/*

  * ffmpeg main

  * Copyright (c) 2000-2003 Fabrice Bellard

  *

  * This file is part of FFmpeg.
  *
  * FFmpeg is free software; you can redistribute it and/or

  * modify it under the terms of the GNU Lesser General Public
  * License as published by the Free Software Foundation; either

  * version 2.1 of the License, or (at your option) any later version.

  *

  * FFmpeg is distributed in the hope that it will be useful,

  * but WITHOUT ANY WARRANTY; without even the implied warranty of

  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  * Lesser General Public License for more details.

  *

  * You should have received a copy of the GNU Lesser General Public

  * License along with FFmpeg; if not, write to the Free Software

  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA

  */

 #include "config.h"
 #include <ctype.h>
 #include <string.h>
 #include <math.h>
 #include <stdlib.h>
 #include <errno.h>

 #include <signal.h>

 #include <limits.h>

 #include <unistd.h>

 #include "libavformat/avformat.h"
 #include "libavdevice/avdevice.h"
 #include "libswscale/swscale.h"

 #include "libavutil/opt.h"

 #include "libavcodec/audioconvert.h"

 #include "libavutil/audioconvert.h"
 #include "libavutil/parseutils.h"
 #include "libavutil/samplefmt.h"

 #include "libavutil/colorspace.h"

 #include "libavutil/fifo.h"

 #include "libavutil/intreadwrite.h"

 #include "libavutil/dict.h"

 #include "libavutil/pixdesc.h"

 #include "libavutil/avstring.h"

 #include "libavutil/libm.h"

 #include "libavformat/os_support.h"

 #include "libavformat/ffm.h" // not public API
 

 #if CONFIG_AVFILTER

 # include "libavfilter/avcodec.h"

 # include "libavfilter/avfilter.h"
 # include "libavfilter/avfiltergraph.h"

 # include "libavfilter/vsink_buffer.h"

 # include "libavfilter/vsrc_buffer.h"
 #endif
 

 #if HAVE_SYS_RESOURCE_H

 #include <sys/types.h>

 #include <sys/time.h>

 #include <sys/resource.h>

 #elif HAVE_GETPROCESSTIMES

 #include <windows.h>
 #endif

 #if HAVE_GETPROCESSMEMORYINFO
 #include <windows.h>
 #include <psapi.h>
 #endif

 #if HAVE_SYS_SELECT_H

 #include <sys/select.h>
 #endif
 

 #if HAVE_TERMIOS_H
 #include <fcntl.h>
 #include <sys/ioctl.h>
 #include <sys/time.h>
 #include <termios.h>
 #elif HAVE_KBHIT

 #include <conio.h>

 #endif

 #include <time.h>

 #include "cmdutils.h"
 

 #include "libavutil/avassert.h"

 const char program_name[] = "ffmpeg";

 const int program_birth_year = 2000;

 /* select an input stream for an output stream */
 typedef struct AVStreamMap {
     int file_index;
     int stream_index;

     int sync_file_index;
     int sync_stream_index;

 } AVStreamMap;
 

 /**
  * select an input file for an output file
  */

 typedef struct AVMetaDataMap {

     int  file;      //< file index
     char type;      //< type of metadata to copy -- (g)lobal, (s)tream, (c)hapter or (p)rogram
     int  index;     //< stream/chapter/program number

 } AVMetaDataMap;
 

 typedef struct AVChapterMap {
     int in_file;
     int out_file;
 } AVChapterMap;
 

 static const OptionDef options[];

 #define MAX_FILES 100

 #define MAX_STREAMS 1024    /* arbitrary sanity check value */

 static const char *last_asked_format = NULL;

 static int64_t input_files_ts_offset[MAX_FILES];

 static double *input_files_ts_scale[MAX_FILES] = {NULL};

 static AVCodec **input_codecs = NULL;
 static int nb_input_codecs = 0;

 static int nb_input_files_ts_scale[MAX_FILES] = {0};

 
 static AVFormatContext *output_files[MAX_FILES];
 static int nb_output_files = 0;
 

 static AVStreamMap *stream_maps = NULL;

 static int nb_stream_maps;
 

 /* first item specifies output metadata, second is input */
 static AVMetaDataMap (*meta_data_maps)[2] = NULL;

 static int nb_meta_data_maps;

 static int metadata_global_autocopy   = 1;

 static int metadata_streams_autocopy  = 1;
 static int metadata_chapters_autocopy = 1;

 static AVChapterMap *chapter_maps = NULL;
 static int nb_chapter_maps;
 

 /* indexed by output file stream index */

 static int *streamid_map = NULL;
 static int nb_streamid_map = 0;

 static int frame_width  = 0;
 static int frame_height = 0;

 static float frame_aspect_ratio = 0;

 static enum PixelFormat frame_pix_fmt = PIX_FMT_NONE;

 static int frame_bits_per_raw_sample = 0;

 static enum AVSampleFormat audio_sample_fmt = AV_SAMPLE_FMT_NONE;

 static int max_frames[4] = {INT_MAX, INT_MAX, INT_MAX, INT_MAX};

 static AVRational frame_rate;

 static float video_qscale = 0;

 static uint16_t *intra_matrix = NULL;
 static uint16_t *inter_matrix = NULL;

 static const char *video_rc_override_string=NULL;

 static int video_disable = 0;

 static int video_discard = 0;

 static char *video_codec_name = NULL;

 static unsigned int video_codec_tag = 0;

 static char *video_language = NULL;

 static int same_quality = 0;

 static int do_deinterlace = 0;

 static int top_field_first = -1;

 static int me_threshold = 0;

 static int intra_dc_precision = 8;

 static int loop_input = 0;

 static int loop_output = AVFMT_NOOUTPUTLOOP;

 static int qp_hist = 0;

 #if CONFIG_AVFILTER
 static char *vfilters = NULL;
 #endif

 
 static int intra_only = 0;

 static int audio_sample_rate = 0;

 static int64_t channel_layout = 0;

 #define QSCALE_NONE -99999
 static float audio_qscale = QSCALE_NONE;

 static int audio_disable = 0;

 static int audio_channels = 0;

 static char  *audio_codec_name = NULL;

 static unsigned int audio_codec_tag = 0;

 static char *audio_language = NULL;
 

 static int subtitle_disable = 0;

 static char *subtitle_codec_name = NULL;

 static char *subtitle_language = NULL;

 static unsigned int subtitle_codec_tag = 0;

 static int data_disable = 0;
 static char *data_codec_name = NULL;
 static unsigned int data_codec_tag = 0;
 

 static float mux_preload= 0.5;
 static float mux_max_delay= 0.7;

 static int64_t recording_time = INT64_MAX;

 static int64_t start_time = 0;

 static int64_t recording_timestamp = 0;

 static int64_t input_ts_offset = 0;

 static int file_overwrite = 0;

 static AVDictionary *metadata;

 static int do_benchmark = 0;

 static int do_hex_dump = 0;

 static int do_pkt_dump = 0;

 static int do_psnr = 0;

 static int do_pass = 0;

 static const char *pass_logfilename_prefix;

 static int audio_stream_copy = 0;
 static int video_stream_copy = 0;

 static int subtitle_stream_copy = 0;

 static int data_stream_copy = 0;

 static int video_sync_method= -1;

 static int audio_sync_method= 0;

 static float audio_drift_threshold= 0.1;

 static int copy_ts= 0;

 static int copy_tb= 0;

 static int opt_shortest = 0;

 static char *vstats_filename;

 static FILE *vstats_file;

 static int opt_programid = 0;

 static int copy_initial_nonkeyframes = 0;

 static int rate_emu = 0;
 

 static int  video_channel = 0;

 static char *video_standard;

 static int audio_volume = 256;

 static int exit_on_error = 0;

 static int using_stdin = 0;

 static int verbose = 1;

 static int run_as_daemon  = 0;

 static int thread_count= 1;

 static int q_pressed = 0;

 static int64_t video_size = 0;
 static int64_t audio_size = 0;
 static int64_t extra_size = 0;

 static int nb_frames_dup = 0;
 static int nb_frames_drop = 0;

 static int input_sync;

 static uint64_t limit_filesize = 0;

 static int force_fps = 0;

 static char *forced_key_frames = NULL;

 static float dts_delta_threshold = 10;

 static int64_t timer_start;

 static uint8_t *audio_buf;
 static uint8_t *audio_out;

 static unsigned int allocated_audio_out_size, allocated_audio_buf_size;

 
 static short *samples;
 

 static AVBitStreamFilterContext *video_bitstream_filters=NULL;
 static AVBitStreamFilterContext *audio_bitstream_filters=NULL;

 static AVBitStreamFilterContext *subtitle_bitstream_filters=NULL;

 #define DEFAULT_PASS_LOGFILENAME_PREFIX "ffmpeg2pass"

 struct AVInputStream;
 

 typedef struct AVOutputStream {
     int file_index;          /* file index */
     int index;               /* stream index in the output file */
     int source_index;        /* AVInputStream index */
     AVStream *st;            /* stream in the output file */

     int encoding_needed;     /* true if encoding needed for this stream */
     int frame_number;
     /* input pts and corresponding output pts
        for A/V sync */

     //double sync_ipts;        /* dts from the AVPacket of the demuxer in second units */
     struct AVInputStream *sync_ist; /* input stream to sync against */

     int64_t sync_opts;       /* output frame counter, could be changed to some true timestamp */ //FIXME look at frame_number

     AVBitStreamFilterContext *bitstream_filters;

     AVCodec *enc;
 

     /* video only */

     int video_resample;

     AVFrame resample_frame;              /* temporary frame for image resampling */

     struct SwsContext *img_resample_ctx; /* for image resampling */
     int resample_height;

     int resample_width;

     int resample_pix_fmt;

     AVRational frame_rate;

     float frame_aspect_ratio;

     /* forced key frames */
     int64_t *forced_kf_pts;
     int forced_kf_count;
     int forced_kf_index;
 

     /* audio only */
     int audio_resample;
     ReSampleContext *resample; /* for audio resampling */

     int resample_sample_fmt;
     int resample_channels;
     int resample_sample_rate;

     int reformat_pair;
     AVAudioConvert *reformat_ctx;

     AVFifoBuffer *fifo;     /* for compression: one audio fifo per codec */

     FILE *logfile;

 
 #if CONFIG_AVFILTER
     AVFilterContext *output_video_filter;
     AVFilterContext *input_video_filter;
     AVFilterBufferRef *picref;
     char *avfilter;
     AVFilterGraph *graph;
 #endif

    int sws_flags;

 } AVOutputStream;
 

 static AVOutputStream **output_streams_for_file[MAX_FILES] = { NULL };
 static int nb_output_streams_for_file[MAX_FILES] = { 0 };
 

 typedef struct AVInputStream {
     int file_index;
     AVStream *st;
     int discard;             /* true if stream data should be discarded */
     int decoding_needed;     /* true if the packets must be decoded in 'raw_fifo' */

     int64_t sample_index;      /* current sample */

 
     int64_t       start;     /* time when read started */

     int64_t       next_pts;  /* synthetic pts for cases where pkt.pts
                                 is not defined */

     int64_t       pts;       /* current pts */

     int is_start;            /* is 1 at the start and after a discontinuity */

     int showed_multi_packet_warning;

     int is_past_recording_time;

 #if CONFIG_AVFILTER
     AVFrame *filter_frame;
     int has_filter_frame;
 #endif

 } AVInputStream;
 
 typedef struct AVInputFile {

     AVFormatContext *ctx;

     int eof_reached;      /* true if eof reached */
     int ist_index;        /* index of first stream in ist_table */
     int buffer_size;      /* current total buffer size */

     int nb_streams;       /* nb streams we are aware of */

 } AVInputFile;
 

 #if HAVE_TERMIOS_H
 
 /* init terminal so that we can grab keys */
 static struct termios oldtty;
 #endif
 

 static AVInputStream *input_streams = NULL;
 static int         nb_input_streams = 0;
 static AVInputFile   *input_files   = NULL;
 static int         nb_input_files   = 0;
 

 #if CONFIG_AVFILTER
 

 static int configure_video_filters(AVInputStream *ist, AVOutputStream *ost)

 {

     AVFilterContext *last_filter, *filter;

     /** filter graph containing all filters including input & output */
     AVCodecContext *codec = ost->st->codec;
     AVCodecContext *icodec = ist->st->codec;

     enum PixelFormat pix_fmts[] = { codec->pix_fmt, PIX_FMT_NONE };

     AVRational sample_aspect_ratio;

     char args[255];

     int ret;

     ost->graph = avfilter_graph_alloc();

     if (ist->st->sample_aspect_ratio.num){
         sample_aspect_ratio = ist->st->sample_aspect_ratio;
     }else
         sample_aspect_ratio = ist->st->codec->sample_aspect_ratio;
 
     snprintf(args, 255, "%d:%d:%d:%d:%d:%d:%d", ist->st->codec->width,
              ist->st->codec->height, ist->st->codec->pix_fmt, 1, AV_TIME_BASE,
              sample_aspect_ratio.num, sample_aspect_ratio.den);
 

     ret = avfilter_graph_create_filter(&ost->input_video_filter, avfilter_get_by_name("buffer"),
                                        "src", args, NULL, ost->graph);

     if (ret < 0)

         return ret;

     ret = avfilter_graph_create_filter(&ost->output_video_filter, avfilter_get_by_name("buffersink"),
                                        "out", NULL, pix_fmts, ost->graph);

     if (ret < 0)

         return ret;

     last_filter = ost->input_video_filter;

     if (codec->width  != icodec->width || codec->height != icodec->height) {

         snprintf(args, 255, "%d:%d:flags=0x%X",

                  codec->width,
                  codec->height,

                  ost->sws_flags);

         if ((ret = avfilter_graph_create_filter(&filter, avfilter_get_by_name("scale"),

                                                 NULL, args, NULL, ost->graph)) < 0)

             return ret;
         if ((ret = avfilter_link(last_filter, 0, filter, 0)) < 0)
             return ret;

         last_filter = filter;

     }
 

     snprintf(args, sizeof(args), "flags=0x%X", ost->sws_flags);

     ost->graph->scale_sws_opts = av_strdup(args);

     if (ost->avfilter) {

         AVFilterInOut *outputs = avfilter_inout_alloc();
         AVFilterInOut *inputs  = avfilter_inout_alloc();

 
         outputs->name    = av_strdup("in");

         outputs->filter_ctx = last_filter;

         outputs->pad_idx = 0;
         outputs->next    = NULL;
 
         inputs->name    = av_strdup("out");

         inputs->filter_ctx = ost->output_video_filter;

         inputs->pad_idx = 0;
         inputs->next    = NULL;
 

         if ((ret = avfilter_graph_parse(ost->graph, ost->avfilter, &inputs, &outputs, NULL)) < 0)

             return ret;

         av_freep(&ost->avfilter);

     } else {

         if ((ret = avfilter_link(last_filter, 0, ost->output_video_filter, 0)) < 0)

             return ret;

     }
 

     if ((ret = avfilter_graph_config(ost->graph, NULL)) < 0)

         return ret;

     codec->width  = ost->output_video_filter->inputs[0]->w;
     codec->height = ost->output_video_filter->inputs[0]->h;

     codec->sample_aspect_ratio = ost->st->sample_aspect_ratio =

         ost->frame_aspect_ratio ? // overriden by the -aspect cli option
         av_d2q(ost->frame_aspect_ratio*codec->height/codec->width, 255) :

         ost->output_video_filter->inputs[0]->sample_aspect_ratio;

 
     return 0;
 }
 #endif /* CONFIG_AVFILTER */
 

 static void term_exit(void)
 {

     av_log(NULL, AV_LOG_QUIET, "%s", "");

 #if HAVE_TERMIOS_H

     if(!run_as_daemon)

         tcsetattr (0, TCSANOW, &oldtty);

 #endif

 }

 static volatile int received_sigterm = 0;

 
 static void
 sigterm_handler(int sig)
 {
     received_sigterm = sig;

     q_pressed++;

     term_exit();
 }
 

 static void term_init(void)
 {

 #if HAVE_TERMIOS_H

     if(!run_as_daemon){

     struct termios tty;
 
     tcgetattr (0, &tty);
     oldtty = tty;
     atexit(term_exit);
 
     tty.c_iflag &= ~(IGNBRK|BRKINT|PARMRK|ISTRIP
                           |INLCR|IGNCR|ICRNL|IXON);
     tty.c_oflag |= OPOST;
     tty.c_lflag &= ~(ECHO|ECHONL|ICANON|IEXTEN);
     tty.c_cflag &= ~(CSIZE|PARENB);
     tty.c_cflag |= CS8;
     tty.c_cc[VMIN] = 1;
     tty.c_cc[VTIME] = 0;
 
     tcsetattr (0, TCSANOW, &tty);
     signal(SIGQUIT, sigterm_handler); /* Quit (POSIX).  */

     }

 #endif
 

     signal(SIGINT , sigterm_handler); /* Interrupt (ANSI).  */
     signal(SIGTERM, sigterm_handler); /* Termination (ANSI).  */

 #ifdef SIGXCPU
     signal(SIGXCPU, sigterm_handler);
 #endif

 }
 
 /* read a key without blocking */
 static int read_key(void)
 {

 #if HAVE_TERMIOS_H
     int n = 1;
     unsigned char ch;
     struct timeval tv;
     fd_set rfds;
 

     if(run_as_daemon)

         return -1;
 

     FD_ZERO(&rfds);
     FD_SET(0, &rfds);
     tv.tv_sec = 0;
     tv.tv_usec = 0;
     n = select(1, &rfds, NULL, NULL, &tv);
     if (n > 0) {
         n = read(0, &ch, 1);
         if (n == 1)
             return ch;
 
         return n;
     }
 #elif HAVE_KBHIT

     if(kbhit())
         return(getch());

 #endif

     return -1;
 }
 

 static int decode_interrupt_cb(void)
 {

     q_pressed += read_key() == 'q';
     return q_pressed > 1;

 }
 

 static int ffmpeg_exit(int ret)

 {
     int i;
 
     /* close files */
     for(i=0;i<nb_output_files;i++) {
         AVFormatContext *s = output_files[i];

         if (!(s->oformat->flags & AVFMT_NOFILE) && s->pb)

             avio_close(s->pb);

         avformat_free_context(s);

         av_free(output_streams_for_file[i]);

     }

     for(i=0;i<nb_input_files;i++) {

         av_close_input_file(input_files[i].ctx);

         av_free(input_files_ts_scale[i]);
     }

 
     av_free(intra_matrix);
     av_free(inter_matrix);
 
     if (vstats_file)
         fclose(vstats_file);
     av_free(vstats_filename);
 

     av_free(streamid_map);

     av_free(input_codecs);

     av_free(stream_maps);

     av_free(meta_data_maps);

     av_freep(&input_streams);
     av_freep(&input_files);
 

     av_free(video_codec_name);
     av_free(audio_codec_name);
     av_free(subtitle_codec_name);

     av_free(data_codec_name);

 
     av_free(video_standard);
 

     uninit_opts();

     av_free(audio_buf);
     av_free(audio_out);

     allocated_audio_buf_size= allocated_audio_out_size= 0;

     av_free(samples);

 #if CONFIG_AVFILTER
     avfilter_uninit();
 #endif
 

     if (received_sigterm) {
         fprintf(stderr,
             "Received signal %d: terminating.\n",
             (int) received_sigterm);
         exit (255);
     }
 

     exit(ret); /* not all OS-es handle main() return value */
     return ret;

 }
 
 /* similar to ff_dynarray_add() and av_fast_realloc() */
 static void *grow_array(void *array, int elem_size, int *size, int new_size)
 {
     if (new_size >= INT_MAX / elem_size) {
         fprintf(stderr, "Array too big.\n");
         ffmpeg_exit(1);
     }
     if (*size < new_size) {
         uint8_t *tmp = av_realloc(array, new_size*elem_size);
         if (!tmp) {
             fprintf(stderr, "Could not alloc buffer.\n");
             ffmpeg_exit(1);
         }
         memset(tmp + *size*elem_size, 0, (new_size-*size) * elem_size);
         *size = new_size;
         return tmp;
     }
     return array;

 }
 

 static void choose_sample_fmt(AVStream *st, AVCodec *codec)
 {
     if(codec && codec->sample_fmts){

         const enum AVSampleFormat *p= codec->sample_fmts;

         for(; *p!=-1; p++){
             if(*p == st->codec->sample_fmt)
                 break;
         }

         if (*p == -1) {

             if((codec->capabilities & CODEC_CAP_LOSSLESS) && av_get_sample_fmt_name(st->codec->sample_fmt) > av_get_sample_fmt_name(codec->sample_fmts[0]))
                 av_log(NULL, AV_LOG_ERROR, "Convertion will not be lossless'\n");

             av_log(NULL, AV_LOG_WARNING,
                    "Incompatible sample format '%s' for codec '%s', auto-selecting format '%s'\n",
                    av_get_sample_fmt_name(st->codec->sample_fmt),
                    codec->name,
                    av_get_sample_fmt_name(codec->sample_fmts[0]));

             st->codec->sample_fmt = codec->sample_fmts[0];

         }

     }
 }
 

 static void choose_sample_rate(AVStream *st, AVCodec *codec)
 {
     if(codec && codec->supported_samplerates){
         const int *p= codec->supported_samplerates;

         int best=0;

         int best_dist=INT_MAX;
         for(; *p; p++){
             int dist= abs(st->codec->sample_rate - *p);
             if(dist < best_dist){
                 best_dist= dist;
                 best= *p;
             }
         }

         if(best_dist){
             av_log(st->codec, AV_LOG_WARNING, "Requested sampling rate unsupported using closest supported (%d)\n", best);
         }

         st->codec->sample_rate= best;
     }
 }
 

 static void choose_pixel_fmt(AVStream *st, AVCodec *codec)
 {
     if(codec && codec->pix_fmts){
         const enum PixelFormat *p= codec->pix_fmts;

         if(st->codec->strict_std_compliance <= FF_COMPLIANCE_UNOFFICIAL){
             if(st->codec->codec_id==CODEC_ID_MJPEG){
                 p= (const enum PixelFormat[]){PIX_FMT_YUVJ420P, PIX_FMT_YUVJ422P, PIX_FMT_YUV420P, PIX_FMT_YUV422P, PIX_FMT_NONE};
             }else if(st->codec->codec_id==CODEC_ID_LJPEG){
                 p= (const enum PixelFormat[]){PIX_FMT_YUVJ420P, PIX_FMT_YUVJ422P, PIX_FMT_YUVJ444P, PIX_FMT_YUV420P, PIX_FMT_YUV422P, PIX_FMT_YUV444P, PIX_FMT_BGRA, PIX_FMT_NONE};
             }
         }

         for(; *p!=-1; p++){
             if(*p == st->codec->pix_fmt)
                 break;
         }

         if (*p == -1) {

             if(st->codec->pix_fmt != PIX_FMT_NONE)

                 av_log(NULL, AV_LOG_WARNING,
                         "Incompatible pixel format '%s' for codec '%s', auto-selecting format '%s'\n",
                         av_pix_fmt_descriptors[st->codec->pix_fmt].name,
                         codec->name,
                         av_pix_fmt_descriptors[codec->pix_fmts[0]].name);

             st->codec->pix_fmt = codec->pix_fmts[0];

         }

     }
 }
 

 static AVOutputStream *new_output_stream(AVFormatContext *oc, int file_idx)
 {
     int idx = oc->nb_streams - 1;
     AVOutputStream *ost;
 
     output_streams_for_file[file_idx] =
         grow_array(output_streams_for_file[file_idx],
                    sizeof(*output_streams_for_file[file_idx]),
                    &nb_output_streams_for_file[file_idx],
                    oc->nb_streams);
     ost = output_streams_for_file[file_idx][idx] =
         av_mallocz(sizeof(AVOutputStream));
     if (!ost) {
         fprintf(stderr, "Could not alloc output stream\n");
         ffmpeg_exit(1);
     }
     ost->file_index = file_idx;
     ost->index = idx;

 
     ost->sws_flags = av_get_int(sws_opts, "sws_flags", NULL);

     return ost;
 }
 

 static int read_ffserver_streams(AVFormatContext *s, const char *filename)

 {

     int i, err;

     AVFormatContext *ic;

     int nopts = 0;

     err = av_open_input_file(&ic, filename, NULL, FFM_PACKET_SIZE, NULL);
     if (err < 0)
         return err;

     /* copy stream format */

     s->nb_streams = 0;

     s->streams = av_mallocz(sizeof(AVStream *) * ic->nb_streams);

     for(i=0;i<ic->nb_streams;i++) {
         AVStream *st;

         AVCodec *codec;

         s->nb_streams++;
 

         // FIXME: a more elegant solution is needed

         st = av_mallocz(sizeof(AVStream));

         memcpy(st, ic->streams[i], sizeof(AVStream));

         st->info = av_malloc(sizeof(*st->info));
         memcpy(st->info, ic->streams[i]->info, sizeof(*st->info));

         st->codec = avcodec_alloc_context();

         if (!st->codec) {
             print_error(filename, AVERROR(ENOMEM));

             ffmpeg_exit(1);

         }

         avcodec_copy_context(st->codec, ic->streams[i]->codec);

         s->streams[i] = st;

         codec = avcodec_find_encoder(st->codec->codec_id);
         if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
             if (audio_stream_copy) {
                 st->stream_copy = 1;
             } else
                 choose_sample_fmt(st, codec);
         } else if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
             if (video_stream_copy) {
                 st->stream_copy = 1;
             } else
                 choose_pixel_fmt(st, codec);
         }

         if(st->codec->flags & CODEC_FLAG_BITEXACT)
             nopts = 1;

 
         new_output_stream(s, nb_output_files);

     }
 

     if (!nopts)
         s->timestamp = av_gettime();
 

     av_close_input_file(ic);
     return 0;
 }
 

 static double
 get_sync_ipts(const AVOutputStream *ost)
 {
     const AVInputStream *ist = ost->sync_ist;

     return (double)(ist->pts - start_time)/AV_TIME_BASE;

 }
 

 static void write_frame(AVFormatContext *s, AVPacket *pkt, AVCodecContext *avctx, AVBitStreamFilterContext *bsfc){

     int ret;
 

     while(bsfc){
         AVPacket new_pkt= *pkt;
         int a= av_bitstream_filter_filter(bsfc, avctx, NULL,
                                           &new_pkt.data, &new_pkt.size,
                                           pkt->data, pkt->size,

                                           pkt->flags & AV_PKT_FLAG_KEY);

         if(a>0){

             av_free_packet(pkt);
             new_pkt.destruct= av_destruct_packet;

         } else if(a<0){

             fprintf(stderr, "%s failed for stream %d, codec %s",
                     bsfc->filter->name, pkt->stream_index,
                     avctx->codec ? avctx->codec->name : "copy");

             print_error("", a);

             if (exit_on_error)

                 ffmpeg_exit(1);

         }
         *pkt= new_pkt;
 
         bsfc= bsfc->next;
     }
 

     ret= av_interleaved_write_frame(s, pkt);
     if(ret < 0){
         print_error("av_interleaved_write_frame()", ret);

         ffmpeg_exit(1);

     }

 }
 

 #define MAX_AUDIO_PACKET_SIZE (128 * 1024)

 static void do_audio_out(AVFormatContext *s,
                          AVOutputStream *ost,

                          AVInputStream *ist,
                          unsigned char *buf, int size)
 {

     uint8_t *buftmp;

     int64_t audio_out_size, audio_buf_size;

     int64_t allocated_for_size= size;

     int size_out, frame_bytes, ret, resample_changed;

     AVCodecContext *enc= ost->st->codec;

     AVCodecContext *dec= ist->st->codec;

     int osize = av_get_bytes_per_sample(enc->sample_fmt);
     int isize = av_get_bytes_per_sample(dec->sample_fmt);

     const int coded_bps = av_get_bits_per_sample(enc->codec->id);
 

 need_realloc:
     audio_buf_size= (allocated_for_size + isize*dec->channels - 1) / (isize*dec->channels);

     audio_buf_size= (audio_buf_size*enc->sample_rate + dec->sample_rate) / dec->sample_rate;

     audio_buf_size= audio_buf_size*2 + 10000; //safety factors for the deprecated resampling API

     audio_buf_size= FFMAX(audio_buf_size, enc->frame_size);

     audio_buf_size*= osize*enc->channels;
 
     audio_out_size= FFMAX(audio_buf_size, enc->frame_size * osize * enc->channels);
     if(coded_bps > 8*osize)
         audio_out_size= audio_out_size * coded_bps / (8*osize);
     audio_out_size += FF_MIN_BUFFER_SIZE;
 
     if(audio_out_size > INT_MAX || audio_buf_size > INT_MAX){
         fprintf(stderr, "Buffer sizes too large\n");

         ffmpeg_exit(1);

     }

     av_fast_malloc(&audio_buf, &allocated_audio_buf_size, audio_buf_size);
     av_fast_malloc(&audio_out, &allocated_audio_out_size, audio_out_size);

     if (!audio_buf || !audio_out){
         fprintf(stderr, "Out of memory in do_audio_out\n");

         ffmpeg_exit(1);

     }

     if (enc->channels != dec->channels)
         ost->audio_resample = 1;
 

     resample_changed = ost->resample_sample_fmt  != dec->sample_fmt ||
                        ost->resample_channels    != dec->channels   ||
                        ost->resample_sample_rate != dec->sample_rate;
 
     if ((ost->audio_resample && !ost->resample) || resample_changed) {
         if (resample_changed) {
             av_log(NULL, AV_LOG_INFO, "Input stream #%d.%d frame changed from rate:%d fmt:%s ch:%d to rate:%d fmt:%s ch:%d\n",

                    ist->file_index, ist->st->index,

                    ost->resample_sample_rate, av_get_sample_fmt_name(ost->resample_sample_fmt), ost->resample_channels,
                    dec->sample_rate, av_get_sample_fmt_name(dec->sample_fmt), dec->channels);
             ost->resample_sample_fmt  = dec->sample_fmt;
             ost->resample_channels    = dec->channels;
             ost->resample_sample_rate = dec->sample_rate;
             if (ost->resample)
                 audio_resample_close(ost->resample);
         }

         /* if audio_sync_method is >1 the resampler is needed for audio drift compensation */
         if (audio_sync_method <= 1 &&
             ost->resample_sample_fmt  == enc->sample_fmt &&

             ost->resample_channels    == enc->channels   &&
             ost->resample_sample_rate == enc->sample_rate) {
             ost->resample = NULL;
             ost->audio_resample = 0;
         } else {

             if (dec->sample_fmt != AV_SAMPLE_FMT_S16)
                 fprintf(stderr, "Warning, using s16 intermediate sample format for resampling\n");
             ost->resample = av_audio_resample_init(enc->channels,    dec->channels,
                                                    enc->sample_rate, dec->sample_rate,
                                                    enc->sample_fmt,  dec->sample_fmt,
                                                    16, 10, 0, 0.8);
             if (!ost->resample) {
                 fprintf(stderr, "Can not resample %d channels @ %d Hz to %d channels @ %d Hz\n",
                         dec->channels, dec->sample_rate,
                         enc->channels, enc->sample_rate);
                 ffmpeg_exit(1);
             }

         }

     }
 

 #define MAKE_SFMT_PAIR(a,b) ((a)+AV_SAMPLE_FMT_NB*(b))

     if (!ost->audio_resample && dec->sample_fmt!=enc->sample_fmt &&

         MAKE_SFMT_PAIR(enc->sample_fmt,dec->sample_fmt)!=ost->reformat_pair) {
         if (ost->reformat_ctx)
             av_audio_convert_free(ost->reformat_ctx);
         ost->reformat_ctx = av_audio_convert_alloc(enc->sample_fmt, 1,
                                                    dec->sample_fmt, 1, NULL, 0);
         if (!ost->reformat_ctx) {
             fprintf(stderr, "Cannot convert %s sample format to %s sample format\n",

                 av_get_sample_fmt_name(dec->sample_fmt),
                 av_get_sample_fmt_name(enc->sample_fmt));

             ffmpeg_exit(1);

         }
         ost->reformat_pair=MAKE_SFMT_PAIR(enc->sample_fmt,dec->sample_fmt);
     }
 

     if(audio_sync_method){

         double delta = get_sync_ipts(ost) * enc->sample_rate - ost->sync_opts

                 - av_fifo_size(ost->fifo)/(enc->channels * 2);
         double idelta= delta*dec->sample_rate / enc->sample_rate;

         int byte_delta= ((int)idelta)*2*dec->channels;

         //FIXME resample delay
         if(fabs(delta) > 50){

             if(ist->is_start || fabs(delta) > audio_drift_threshold*enc->sample_rate){

                 if(byte_delta < 0){

                     byte_delta= FFMAX(byte_delta, -size);

                     size += byte_delta;
                     buf  -= byte_delta;
                     if(verbose > 2)
                         fprintf(stderr, "discarding %d audio samples\n", (int)-delta);
                     if(!size)
                         return;
                     ist->is_start=0;
                 }else{
                     static uint8_t *input_tmp= NULL;
                     input_tmp= av_realloc(input_tmp, byte_delta + size);
 

                     if(byte_delta > allocated_for_size - size){
                         allocated_for_size= byte_delta + (int64_t)size;
                         goto need_realloc;
                     }
                     ist->is_start=0;

 
                     memset(input_tmp, 0, byte_delta);
                     memcpy(input_tmp + byte_delta, buf, size);
                     buf= input_tmp;
                     size += byte_delta;
                     if(verbose > 2)
                         fprintf(stderr, "adding %d audio samples of silence\n", (int)delta);
                 }
             }else if(audio_sync_method>1){

                 int comp= av_clip(delta, -audio_sync_method, audio_sync_method);

                 av_assert0(ost->audio_resample);

                 if(verbose > 2)
                     fprintf(stderr, "compensating audio timestamp drift:%f compensation:%d in:%d\n", delta, comp, enc->sample_rate);

 //                fprintf(stderr, "drift:%f len:%d opts:%"PRId64" ipts:%"PRId64" fifo:%d\n", delta, -1, ost->sync_opts, (int64_t)(get_sync_ipts(ost) * enc->sample_rate), av_fifo_size(ost->fifo)/(ost->st->codec->channels * 2));

                 av_resample_compensate(*(struct AVResampleContext**)ost->resample, comp, enc->sample_rate);
             }

         }

     }else

         ost->sync_opts= lrintf(get_sync_ipts(ost) * enc->sample_rate)

                         - av_fifo_size(ost->fifo)/(enc->channels * 2); //FIXME wrong

 
     if (ost->audio_resample) {
         buftmp = audio_buf;

         size_out = audio_resample(ost->resample,

                                   (short *)buftmp, (short *)buf,

                                   size / (dec->channels * isize));

         size_out = size_out * enc->channels * osize;

     } else {
         buftmp = buf;
         size_out = size;
     }
 

     if (!ost->audio_resample && dec->sample_fmt!=enc->sample_fmt) {

         const void *ibuf[6]= {buftmp};

         void *obuf[6]= {audio_buf};

         int istride[6]= {isize};
         int ostride[6]= {osize};

         int len= size_out/istride[0];
         if (av_audio_convert(ost->reformat_ctx, obuf, ostride, ibuf, istride, len)<0) {
             printf("av_audio_convert() failed\n");

             if (exit_on_error)

                 ffmpeg_exit(1);

             return;
         }

         buftmp = audio_buf;

         size_out = len*osize;

     }
 

     /* now encode as many frames as possible */

     if (enc->frame_size > 1) {

         /* output resampled raw samples */

         if (av_fifo_realloc2(ost->fifo, av_fifo_size(ost->fifo) + size_out) < 0) {

             fprintf(stderr, "av_fifo_realloc2() failed\n");

             ffmpeg_exit(1);

         }

         av_fifo_generic_write(ost->fifo, buftmp, size_out, NULL);

         frame_bytes = enc->frame_size * osize * enc->channels;

         while (av_fifo_size(ost->fifo) >= frame_bytes) {

             AVPacket pkt;
             av_init_packet(&pkt);
 

             av_fifo_generic_read(ost->fifo, audio_buf, frame_bytes, NULL);

             //FIXME pass ost->sync_opts as AVFrame.pts in avcodec_encode_audio()
 

             ret = avcodec_encode_audio(enc, audio_out, audio_out_size,

                                        (short *)audio_buf);

             if (ret < 0) {
                 fprintf(stderr, "Audio encoding failed\n");

                 ffmpeg_exit(1);

             }

             audio_size += ret;

             pkt.stream_index= ost->index;
             pkt.data= audio_out;
             pkt.size= ret;

             if(enc->coded_frame && enc->coded_frame->pts != AV_NOPTS_VALUE)

                 pkt.pts= av_rescale_q(enc->coded_frame->pts, enc->time_base, ost->st->time_base);

             pkt.flags |= AV_PKT_FLAG_KEY;

             write_frame(s, &pkt, enc, ost->bitstream_filters);

             ost->sync_opts += enc->frame_size;

         }
     } else {

         AVPacket pkt;
         av_init_packet(&pkt);

         ost->sync_opts += size_out / (osize * enc->channels);

         /* output a pcm frame */

         /* determine the size of the coded buffer */
         size_out /= osize;
         if (coded_bps)

             size_out = size_out*coded_bps/8;

         if(size_out > audio_out_size){
             fprintf(stderr, "Internal error, buffer size too small\n");

             ffmpeg_exit(1);

         }
 

         //FIXME pass ost->sync_opts as AVFrame.pts in avcodec_encode_audio()

         ret = avcodec_encode_audio(enc, audio_out, size_out,

                                    (short *)buftmp);

         if (ret < 0) {
             fprintf(stderr, "Audio encoding failed\n");

             ffmpeg_exit(1);

         }

         audio_size += ret;

         pkt.stream_index= ost->index;
         pkt.data= audio_out;
         pkt.size= ret;

         if(enc->coded_frame && enc->coded_frame->pts != AV_NOPTS_VALUE)

             pkt.pts= av_rescale_q(enc->coded_frame->pts, enc->time_base, ost->st->time_base);

         pkt.flags |= AV_PKT_FLAG_KEY;

         write_frame(s, &pkt, enc, ost->bitstream_filters);

     }
 }
 

 static void pre_process_video_frame(AVInputStream *ist, AVPicture *picture, void **bufp)
 {
     AVCodecContext *dec;
     AVPicture *picture2;
     AVPicture picture_tmp;

     uint8_t *buf = 0;

     dec = ist->st->codec;

 
     /* deinterlace : must be done before any resize */

     if (do_deinterlace) {

         int size;
 
         /* create temporary picture */
         size = avpicture_get_size(dec->pix_fmt, dec->width, dec->height);
         buf = av_malloc(size);
         if (!buf)
             return;

         picture2 = &picture_tmp;
         avpicture_fill(picture2, buf, dec->pix_fmt, dec->width, dec->height);
 

         if(avpicture_deinterlace(picture2, picture,
                                  dec->pix_fmt, dec->width, dec->height) < 0) {
             /* if error, do not deinterlace */
             fprintf(stderr, "Deinterlacing failed\n");
             av_free(buf);
             buf = NULL;
             picture2 = picture;
         }

     } else {
         picture2 = picture;
     }
 
     if (picture != picture2)
         *picture = *picture2;
     *bufp = buf;
 }
 

 /* we begin to correct av delay at this threshold */
 #define AV_DELAY_MAX 0.100

 static void do_subtitle_out(AVFormatContext *s,
                             AVOutputStream *ost,

                             AVInputStream *ist,
                             AVSubtitle *sub,
                             int64_t pts)
 {
     static uint8_t *subtitle_out = NULL;

     int subtitle_out_max_size = 1024 * 1024;

     int subtitle_out_size, nb, i;
     AVCodecContext *enc;
     AVPacket pkt;
 
     if (pts == AV_NOPTS_VALUE) {
         fprintf(stderr, "Subtitle packets must have a pts\n");

         if (exit_on_error)

             ffmpeg_exit(1);

         return;
     }
 

     enc = ost->st->codec;

 
     if (!subtitle_out) {
         subtitle_out = av_malloc(subtitle_out_max_size);
     }
 
     /* Note: DVB subtitle need one packet to draw them and one other
        packet to clear them */
     /* XXX: signal it in the codec context ? */
     if (enc->codec_id == CODEC_ID_DVB_SUBTITLE)
         nb = 2;
     else
         nb = 1;
 
     for(i = 0; i < nb; i++) {

         sub->pts = av_rescale_q(pts, ist->st->time_base, AV_TIME_BASE_Q);

         // start_display_time is required to be 0
         sub->pts              += av_rescale_q(sub->start_display_time, (AVRational){1, 1000}, AV_TIME_BASE_Q);
         sub->end_display_time -= sub->start_display_time;
         sub->start_display_time = 0;

         subtitle_out_size = avcodec_encode_subtitle(enc, subtitle_out,

                                                     subtitle_out_max_size, sub);

         if (subtitle_out_size < 0) {
             fprintf(stderr, "Subtitle encoding failed\n");

             ffmpeg_exit(1);

         }

         av_init_packet(&pkt);
         pkt.stream_index = ost->index;
         pkt.data = subtitle_out;
         pkt.size = subtitle_out_size;

         pkt.pts = av_rescale_q(sub->pts, AV_TIME_BASE_Q, ost->st->time_base);

         if (enc->codec_id == CODEC_ID_DVB_SUBTITLE) {
             /* XXX: the pts correction is handled here. Maybe handling
                it in the codec would be better */
             if (i == 0)
                 pkt.pts += 90 * sub->start_display_time;
             else
                 pkt.pts += 90 * sub->end_display_time;
         }

         write_frame(s, &pkt, ost->st->codec, ost->bitstream_filters);

     }
 }
 

 static int bit_buffer_size= 1024*256;

 static uint8_t *bit_buffer= NULL;

 static void do_video_out(AVFormatContext *s,
                          AVOutputStream *ost,

                          AVInputStream *ist,

                          AVFrame *in_picture,

                          int *frame_size)

 {

     int nb_frames, i, ret, av_unused resample_changed;

     AVFrame *final_picture, *formatted_picture;

     AVCodecContext *enc, *dec;

     double sync_ipts;

     enc = ost->st->codec;
     dec = ist->st->codec;

     sync_ipts = get_sync_ipts(ost) / av_q2d(enc->time_base);
 

     /* by default, we output a single frame */
     nb_frames = 1;
 

     *frame_size = 0;
 

     if(video_sync_method){

         double vdelta = sync_ipts - ost->sync_opts;

         //FIXME set to 0.5 after we fix some dts/pts bugs like in avidec.c
         if (vdelta < -1.1)
             nb_frames = 0;

         else if (video_sync_method == 2 || (video_sync_method<0 && (s->oformat->flags & AVFMT_VARIABLE_FPS))){
             if(vdelta<=-0.6){
                 nb_frames=0;
             }else if(vdelta>0.6)

                 ost->sync_opts= lrintf(sync_ipts);

         }else if (vdelta > 1.1)

             nb_frames = lrintf(vdelta);

 //fprintf(stderr, "vdelta:%f, ost->sync_opts:%"PRId64", ost->sync_ipts:%f nb_frames:%d\n", vdelta, ost->sync_opts, get_sync_ipts(ost), nb_frames);

         if (nb_frames == 0){
             ++nb_frames_drop;
             if (verbose>2)
                 fprintf(stderr, "*** drop!\n");

         }else if (nb_frames > 1) {

             nb_frames_dup += nb_frames - 1;

             if (verbose>2)

                 fprintf(stderr, "*** %d dup!\n", nb_frames-1);

         }
     }else

         ost->sync_opts= lrintf(sync_ipts);

     nb_frames= FFMIN(nb_frames, max_frames[AVMEDIA_TYPE_VIDEO] - ost->frame_number);

     if (nb_frames <= 0)

         return;

     formatted_picture = in_picture;

     final_picture = formatted_picture;
 

 #if !CONFIG_AVFILTER

     resample_changed = ost->resample_width   != dec->width  ||
                        ost->resample_height  != dec->height ||
                        ost->resample_pix_fmt != dec->pix_fmt;
 
     if (resample_changed) {

         av_log(NULL, AV_LOG_INFO,
                "Input stream #%d.%d frame changed from size:%dx%d fmt:%s to size:%dx%d fmt:%s\n",

                ist->file_index, ist->st->index,

                ost->resample_width, ost->resample_height, av_get_pix_fmt_name(ost->resample_pix_fmt),
                dec->width         , dec->height         , av_get_pix_fmt_name(dec->pix_fmt));

         ost->resample_width   = dec->width;
         ost->resample_height  = dec->height;
         ost->resample_pix_fmt = dec->pix_fmt;

     }
 

     ost->video_resample = dec->width   != enc->width  ||
                           dec->height  != enc->height ||
                           dec->pix_fmt != enc->pix_fmt;
 

     if (ost->video_resample) {

         final_picture = &ost->resample_frame;

         if (!ost->img_resample_ctx || resample_changed) {
             /* initialize the destination picture */

             if (!ost->resample_frame.data[0]) {
                 avcodec_get_frame_defaults(&ost->resample_frame);
                 if (avpicture_alloc((AVPicture *)&ost->resample_frame, enc->pix_fmt,

                                     enc->width, enc->height)) {
                     fprintf(stderr, "Cannot allocate temp picture, check pix fmt\n");
                     ffmpeg_exit(1);
                 }
             }

             /* initialize a new scaler context */
             sws_freeContext(ost->img_resample_ctx);

             ost->img_resample_ctx = sws_getContext(dec->width, dec->height, dec->pix_fmt,
                                                    enc->width, enc->height, enc->pix_fmt,

                                                    ost->sws_flags, NULL, NULL, NULL);

             if (ost->img_resample_ctx == NULL) {
                 fprintf(stderr, "Cannot get resampling context\n");

                 ffmpeg_exit(1);

             }
         }

         sws_scale(ost->img_resample_ctx, formatted_picture->data, formatted_picture->linesize,

               0, ost->resample_height, final_picture->data, final_picture->linesize);

     }

 #endif

     /* duplicates frame if needed */

     for(i=0;i<nb_frames;i++) {

         AVPacket pkt;
         av_init_packet(&pkt);
         pkt.stream_index= ost->index;
 

         if (s->oformat->flags & AVFMT_RAWPICTURE) {
             /* raw pictures are written as AVPicture structure to
                avoid any copies. We support temorarily the older
                method. */

             AVFrame* old_frame = enc->coded_frame;

             enc->coded_frame = dec->coded_frame; //FIXME/XXX remove this hack

             pkt.data= (uint8_t *)final_picture;
             pkt.size=  sizeof(AVPicture);

             pkt.pts= av_rescale_q(ost->sync_opts, enc->time_base, ost->st->time_base);

             pkt.flags |= AV_PKT_FLAG_KEY;

             write_frame(s, &pkt, ost->st->codec, ost->bitstream_filters);

             enc->coded_frame = old_frame;

         } else {

             AVFrame big_picture;

 
             big_picture= *final_picture;

             /* better than nothing: use input picture interlaced
                settings */
             big_picture.interlaced_frame = in_picture->interlaced_frame;

             if (ost->st->codec->flags & (CODEC_FLAG_INTERLACED_DCT|CODEC_FLAG_INTERLACED_ME)) {

                 if(top_field_first == -1)
                     big_picture.top_field_first = in_picture->top_field_first;
                 else

                     big_picture.top_field_first = top_field_first;

             }

             /* handles sameq here. This is not correct because it may
                not be a global option */

             big_picture.quality = same_quality ? ist->st->quality : ost->st->quality;

             if(!me_threshold)
                 big_picture.pict_type = 0;

 //            big_picture.pts = AV_NOPTS_VALUE;

             big_picture.pts= ost->sync_opts;
 //            big_picture.pts= av_rescale(ost->sync_opts, AV_TIME_BASE*(int64_t)enc->time_base.num, enc->time_base.den);

 //av_log(NULL, AV_LOG_DEBUG, "%"PRId64" -> encoder\n", ost->sync_opts);

             if (ost->forced_kf_index < ost->forced_kf_count &&
                 big_picture.pts >= ost->forced_kf_pts[ost->forced_kf_index]) {

                 big_picture.pict_type = AV_PICTURE_TYPE_I;

                 ost->forced_kf_index++;
             }

             ret = avcodec_encode_video(enc,

                                        bit_buffer, bit_buffer_size,

                                        &big_picture);

             if (ret < 0) {

                 fprintf(stderr, "Video encoding failed\n");

                 ffmpeg_exit(1);

             }

             if(ret>0){

                 pkt.data= bit_buffer;

                 pkt.size= ret;

                 if(enc->coded_frame->pts != AV_NOPTS_VALUE)

                     pkt.pts= av_rescale_q(enc->coded_frame->pts, enc->time_base, ost->st->time_base);

 /*av_log(NULL, AV_LOG_DEBUG, "encoder -> %"PRId64"/%"PRId64"\n",

    pkt.pts != AV_NOPTS_VALUE ? av_rescale(pkt.pts, enc->time_base.den, AV_TIME_BASE*(int64_t)enc->time_base.num) : -1,
    pkt.dts != AV_NOPTS_VALUE ? av_rescale(pkt.dts, enc->time_base.den, AV_TIME_BASE*(int64_t)enc->time_base.num) : -1);*/

                 if(enc->coded_frame->key_frame)

                     pkt.flags |= AV_PKT_FLAG_KEY;

                 write_frame(s, &pkt, ost->st->codec, ost->bitstream_filters);

                 *frame_size = ret;

                 video_size += ret;

                 //fprintf(stderr,"\nFrame: %3d size: %5d type: %d",
                 //        enc->frame_number-1, ret, enc->pict_type);

                 /* if two pass, output log */
                 if (ost->logfile && enc->stats_out) {
                     fprintf(ost->logfile, "%s", enc->stats_out);
                 }

             }

         }

         ost->sync_opts++;

         ost->frame_number++;

     }
 }
 

 static double psnr(double d){

     return -10.0*log(d)/log(10.0);

 }
 

 static void do_video_stats(AVFormatContext *os, AVOutputStream *ost,

                            int frame_size)

 {
     AVCodecContext *enc;
     int frame_number;
     double ti1, bitrate, avg_bitrate;

     /* this is executed just the first time do_video_stats is called */

     if (!vstats_file) {
         vstats_file = fopen(vstats_filename, "w");
         if (!vstats_file) {

             perror("fopen");

             ffmpeg_exit(1);

         }
     }
 

     enc = ost->st->codec;

     if (enc->codec_type == AVMEDIA_TYPE_VIDEO) {

         frame_number = ost->frame_number;

         fprintf(vstats_file, "frame= %5d q= %2.1f ", frame_number, enc->coded_frame->quality/(float)FF_QP2LAMBDA);

         if (enc->flags&CODEC_FLAG_PSNR)

             fprintf(vstats_file, "PSNR= %6.2f ", psnr(enc->coded_frame->error[0]/(enc->width*enc->height*255.0*255.0)));

         fprintf(vstats_file,"f_size= %6d ", frame_size);

         /* compute pts value */

         ti1 = ost->sync_opts * av_q2d(enc->time_base);

         if (ti1 < 0.01)
             ti1 = 0.01;

         bitrate = (frame_size * 8) / av_q2d(enc->time_base) / 1000.0;

         avg_bitrate = (double)(video_size * 8) / ti1 / 1000.0;

         fprintf(vstats_file, "s_size= %8.0fkB time= %0.3f br= %7.1fkbits/s avg_br= %7.1fkbits/s ",

             (double)video_size / 1024, ti1, bitrate, avg_bitrate);

         fprintf(vstats_file, "type= %c\n", av_get_picture_type_char(enc->coded_frame->pict_type));

     }

 }
 

 static void print_report(AVFormatContext **output_files,

                          AVOutputStream **ost_table, int nb_ostreams,
                          int is_last_report)

 {
     char buf[1024];
     AVOutputStream *ost;

     AVFormatContext *oc;

     int64_t total_size;

     AVCodecContext *enc;
     int frame_number, vid, i;

     double bitrate;
     int64_t pts = INT64_MAX;

     static int64_t last_time = -1;

     static int qp_histogram[52];

     if (!is_last_report) {

         int64_t cur_time;

         /* display the report every 0.5 seconds */
         cur_time = av_gettime();
         if (last_time == -1) {
             last_time = cur_time;
             return;

         }

         if ((cur_time - last_time) < 500000)
             return;
         last_time = cur_time;
     }
 

     oc = output_files[0];
 

     total_size = avio_size(oc->pb);
     if(total_size<0) // FIXME improve avio_size() so it works with non seekable output too

         total_size= avio_tell(oc->pb);

     buf[0] = '\0';
     vid = 0;
     for(i=0;i<nb_ostreams;i++) {

         float q = -1;

         ost = ost_table[i];

         enc = ost->st->codec;

         if (!ost->st->stream_copy && enc->coded_frame)
             q = enc->coded_frame->quality/(float)FF_QP2LAMBDA;

         if (vid && enc->codec_type == AVMEDIA_TYPE_VIDEO) {

             snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "q=%2.1f ", q);

         }

         if (!vid && enc->codec_type == AVMEDIA_TYPE_VIDEO) {

             float t = (av_gettime()-timer_start) / 1000000.0;
 

             frame_number = ost->frame_number;

             snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "frame=%5d fps=%3d q=%3.1f ",

                      frame_number, (t>1)?(int)(frame_number/t+0.5) : 0, q);

             if(is_last_report)

                 snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "L");

             if(qp_hist){

                 int j;

                 int qp = lrintf(q);

                 if(qp>=0 && qp<FF_ARRAY_ELEMS(qp_histogram))

                     qp_histogram[qp]++;
                 for(j=0; j<32; j++)
                     snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "%X", (int)lrintf(log(qp_histogram[j]+1)/log(2)));
             }

             if (enc->flags&CODEC_FLAG_PSNR){
                 int j;
                 double error, error_sum=0;
                 double scale, scale_sum=0;
                 char type[3]= {'Y','U','V'};

                 snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "PSNR=");

                 for(j=0; j<3; j++){
                     if(is_last_report){
                         error= enc->error[j];
                         scale= enc->width*enc->height*255.0*255.0*frame_number;
                     }else{
                         error= enc->coded_frame->error[j];
                         scale= enc->width*enc->height*255.0*255.0;
                     }
                     if(j) scale/=4;
                     error_sum += error;
                     scale_sum += scale;

                     snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "%c:%2.2f ", type[j], psnr(error/scale));

                 }

                 snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "*:%2.2f ", psnr(error_sum/scale_sum));

             }

             vid = 1;
         }
         /* compute min output value */

         pts = FFMIN(pts, av_rescale_q(ost->st->pts.val,
                                       ost->st->time_base, AV_TIME_BASE_Q));

     }

     if (verbose > 0 || is_last_report) {

         int hours, mins, secs, us;
         secs = pts / AV_TIME_BASE;
         us = pts % AV_TIME_BASE;
         mins = secs / 60;
         secs %= 60;
         hours = mins / 60;
         mins %= 60;
 

         bitrate = pts ? total_size * 8 / (pts / 1000.0) : 0;

 
         snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf),

                  "size=%8.0fkB time=", total_size / 1024.0);
         snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf),
                  "%02d:%02d:%02d.%02d ", hours, mins, secs,
                  (100 * us) / AV_TIME_BASE);
         snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf),
                  "bitrate=%6.1fkbits/s", bitrate);

         if (nb_frames_dup || nb_frames_drop)

           snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), " dup=%d drop=%d",
                   nb_frames_dup, nb_frames_drop);

         if (verbose >= 0)
             fprintf(stderr, "%s    \r", buf);
 

         fflush(stderr);
     }

     if (is_last_report && verbose >= 0){
         int64_t raw= audio_size + video_size + extra_size;

         fprintf(stderr, "\n");

         fprintf(stderr, "video:%1.0fkB audio:%1.0fkB global headers:%1.0fkB muxing overhead %f%%\n",
                 video_size/1024.0,
                 audio_size/1024.0,
                 extra_size/1024.0,
                 100.0*(total_size - raw)/raw
         );
     }

 }
 

 static void generate_silence(uint8_t* buf, enum AVSampleFormat sample_fmt, size_t size)
 {
     int fill_char = 0x00;
     if (sample_fmt == AV_SAMPLE_FMT_U8)
         fill_char = 0x80;
     memset(buf, fill_char, size);
 }
 

 /* pkt = NULL means EOF (needed to flush decoder buffers) */
 static int output_packet(AVInputStream *ist, int ist_index,
                          AVOutputStream **ost_table, int nb_ostreams,

                          const AVPacket *pkt)

 {
     AVFormatContext *os;
     AVOutputStream *ost;

     int ret, i;

     int got_output;

     AVFrame picture;

     void *buffer_to_free = NULL;

     static unsigned int samples_size= 0;

     AVSubtitle subtitle, *subtitle_to_free;

     int64_t pkt_pts = AV_NOPTS_VALUE;

 #if CONFIG_AVFILTER

     int frame_available;

 #endif
 

     AVPacket avpkt;

     int bps = av_get_bytes_per_sample(ist->st->codec->sample_fmt);

     if(ist->next_pts == AV_NOPTS_VALUE)
         ist->next_pts= ist->pts;
 

     if (pkt == NULL) {
         /* EOF handling */

         av_init_packet(&avpkt);

         avpkt.data = NULL;
         avpkt.size = 0;

         goto handle_eof;

     } else {
         avpkt = *pkt;

     }
 

     if(pkt->dts != AV_NOPTS_VALUE)
         ist->next_pts = ist->pts = av_rescale_q(pkt->dts, ist->st->time_base, AV_TIME_BASE_Q);

     if(pkt->pts != AV_NOPTS_VALUE)
         pkt_pts = av_rescale_q(pkt->pts, ist->st->time_base, AV_TIME_BASE_Q);

     //while we have more to decode or while the decoder did output something on EOF

     while (avpkt.size > 0 || (!pkt && got_output)) {

         uint8_t *data_buf, *decoded_data_buf;
         int data_size, decoded_data_size;

     handle_eof:

         ist->pts= ist->next_pts;

         if(avpkt.size && avpkt.size != pkt->size &&

            ((!ist->showed_multi_packet_warning && verbose>0) || verbose>1)){

             fprintf(stderr, "Multiple frames in a packet from stream %d\n", pkt->stream_index);

             ist->showed_multi_packet_warning=1;
         }

         /* decode the packet if needed */

         decoded_data_buf = NULL; /* fail safe */
         decoded_data_size= 0;
         data_buf  = avpkt.data;
         data_size = avpkt.size;

         subtitle_to_free = NULL;

         if (ist->decoding_needed) {

             switch(ist->st->codec->codec_type) {

             case AVMEDIA_TYPE_AUDIO:{

                 if(pkt && samples_size < FFMAX(pkt->size*sizeof(*samples), AVCODEC_MAX_AUDIO_FRAME_SIZE)) {
                     samples_size = FFMAX(pkt->size*sizeof(*samples), AVCODEC_MAX_AUDIO_FRAME_SIZE);
                     av_free(samples);
                     samples= av_malloc(samples_size);
                 }

                 decoded_data_size= samples_size;

                     /* XXX: could avoid copy if PCM 16 bits with same
                        endianness as CPU */

                 ret = avcodec_decode_audio3(ist->st->codec, samples, &decoded_data_size,

                                             &avpkt);

                 if (ret < 0)
                     goto fail_decode;

                 avpkt.data += ret;
                 avpkt.size -= ret;

                 data_size   = ret;

                 got_output  = decoded_data_size > 0;

                 /* Some bug in mpeg audio decoder gives */

                 /* decoded_data_size < 0, it seems they are overflows */

                 if (!got_output) {

                     /* no audio frame */
                     continue;
                 }

                 decoded_data_buf = (uint8_t *)samples;
                 ist->next_pts += ((int64_t)AV_TIME_BASE/bps * decoded_data_size) /

                     (ist->st->codec->sample_rate * ist->st->codec->channels);

                 break;}

             case AVMEDIA_TYPE_VIDEO:

                     decoded_data_size = (ist->st->codec->width * ist->st->codec->height * 3) / 2;

                     /* XXX: allocate picture correctly */

                     avcodec_get_frame_defaults(&picture);

                     avpkt.pts = pkt_pts;
                     avpkt.dts = ist->pts;

                     pkt_pts = AV_NOPTS_VALUE;

                     ret = avcodec_decode_video2(ist->st->codec,

                                                 &picture, &got_output, &avpkt);

                     ist->st->quality= picture.quality;

                     if (ret < 0)

                         goto fail_decode;

                     if (!got_output) {

                         /* no picture yet */
                         goto discard_packet;
                     }

                     ist->next_pts = ist->pts = picture.best_effort_timestamp;

                     if (ist->st->codec->time_base.num != 0) {

                         int ticks= ist->st->parser ? ist->st->parser->repeat_pict+1 : ist->st->codec->ticks_per_frame;

                         ist->next_pts += ((int64_t)AV_TIME_BASE *

                                           ist->st->codec->time_base.num * ticks) /

                             ist->st->codec->time_base.den;

                     }

                     avpkt.size = 0;

                     buffer_to_free = NULL;
                     pre_process_video_frame(ist, (AVPicture *)&picture, &buffer_to_free);

                     break;

             case AVMEDIA_TYPE_SUBTITLE:

                 ret = avcodec_decode_subtitle2(ist->st->codec,

                                                &subtitle, &got_output, &avpkt);

                 if (ret < 0)

                     goto fail_decode;

                 if (!got_output) {

                     goto discard_packet;

                 }

                 subtitle_to_free = &subtitle;

                 avpkt.size = 0;

                 break;
             default:
                 goto fail_decode;
             }
         } else {

             switch(ist->st->codec->codec_type) {

             case AVMEDIA_TYPE_AUDIO:

                 ist->next_pts += ((int64_t)AV_TIME_BASE * ist->st->codec->frame_size) /

                     ist->st->codec->sample_rate;

                 break;

             case AVMEDIA_TYPE_VIDEO:

                 if (ist->st->codec->time_base.num != 0) {

                     int ticks= ist->st->parser ? ist->st->parser->repeat_pict+1 : ist->st->codec->ticks_per_frame;

                     ist->next_pts += ((int64_t)AV_TIME_BASE *

                                       ist->st->codec->time_base.num * ticks) /

                         ist->st->codec->time_base.den;

                 }

                 break;

             }

             ret = avpkt.size;
             avpkt.size = 0;

         }

 #if CONFIG_AVFILTER
         if(ist->st->codec->codec_type == AVMEDIA_TYPE_VIDEO)
         if (start_time == 0 || ist->pts >= start_time) {
             for(i=0;i<nb_ostreams;i++) {
                 ost = ost_table[i];
                 if (ost->input_video_filter && ost->source_index == ist_index) {
                     if (!picture.sample_aspect_ratio.num)
                         picture.sample_aspect_ratio = ist->st->sample_aspect_ratio;
                     picture.pts = ist->pts;
 
                     av_vsrc_buffer_add_frame(ost->input_video_filter, &picture, AV_VSRC_BUF_FLAG_OVERWRITE);
                 }
             }
         }
 #endif
 

         // preprocess audio (volume)

         if (ist->st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {

             if (audio_volume != 256) {
                 short *volp;
                 volp = samples;

                 for(i=0;i<(decoded_data_size / sizeof(short));i++) {

                     int v = ((*volp) * audio_volume + 128) >> 8;
                     if (v < -32768) v = -32768;
                     if (v >  32767) v = 32767;
                     *volp++ = v;

                 }
             }

         }

         /* frame rate emulation */

         if (rate_emu) {

             int64_t pts = av_rescale(ist->pts, 1000000, AV_TIME_BASE);

             int64_t now = av_gettime() - ist->start;
             if (pts > now)
                 usleep(pts - now);
         }
         /* if output time reached then transcode raw format,
            encode packets and output them */
         if (start_time == 0 || ist->pts >= start_time)
             for(i=0;i<nb_ostreams;i++) {
                 int frame_size;

                 ost = ost_table[i];
                 if (ost->source_index == ist_index) {

 #if CONFIG_AVFILTER
                 frame_available = ist->st->codec->codec_type != AVMEDIA_TYPE_VIDEO ||
                     !ost->output_video_filter || avfilter_poll_frame(ost->output_video_filter->inputs[0]);
                 while (frame_available) {

                     if (ist->st->codec->codec_type == AVMEDIA_TYPE_VIDEO && ost->output_video_filter) {
                         AVRational ist_pts_tb = ost->output_video_filter->inputs[0]->time_base;
                         if (av_vsink_buffer_get_video_buffer_ref(ost->output_video_filter, &ost->picref, 0) < 0)

                             goto cont;

                         if (ost->picref) {
                             avfilter_fill_frame_from_video_buffer_ref(&picture, ost->picref);
                             ist->pts = av_rescale_q(ost->picref->pts, ist_pts_tb, AV_TIME_BASE_Q);
                         }
                     }

 #endif

                     os = output_files[ost->file_index];

                     /* set the input output pts pairs */
                     //ost->sync_ipts = (double)(ist->pts + input_files_ts_offset[ist->file_index] - start_time)/ AV_TIME_BASE;
 
                     if (ost->encoding_needed) {

                         av_assert0(ist->decoding_needed);

                         switch(ost->st->codec->codec_type) {

                         case AVMEDIA_TYPE_AUDIO:

                             do_audio_out(os, ost, ist, decoded_data_buf, decoded_data_size);

                             break;

                         case AVMEDIA_TYPE_VIDEO:

 #if CONFIG_AVFILTER

                             if (ost->picref->video && !ost->frame_aspect_ratio)

                                 ost->st->codec->sample_aspect_ratio = ost->picref->video->sample_aspect_ratio;

 #endif

                             do_video_out(os, ost, ist, &picture, &frame_size);

                             if (vstats_filename && frame_size)

                                 do_video_stats(os, ost, frame_size);
                             break;

                         case AVMEDIA_TYPE_SUBTITLE:

                             do_subtitle_out(os, ost, ist, &subtitle,
                                             pkt->pts);
                             break;
                         default:

                             abort();

                         }
                     } else {
                         AVFrame avframe; //FIXME/XXX remove this

                         AVPicture pict;

                         AVPacket opkt;

                         int64_t ost_tb_start_time= av_rescale_q(start_time, AV_TIME_BASE_Q, ost->st->time_base);
 

                         av_init_packet(&opkt);
 

                         if ((!ost->frame_number && !(pkt->flags & AV_PKT_FLAG_KEY)) && !copy_initial_nonkeyframes)

 #if !CONFIG_AVFILTER
                             continue;
 #else

                             goto cont;

 #endif

                         /* no reencoding needed : output the packet directly */
                         /* force the input stream PTS */
 
                         avcodec_get_frame_defaults(&avframe);
                         ost->st->codec->coded_frame= &avframe;

                         avframe.key_frame = pkt->flags & AV_PKT_FLAG_KEY;

                         if(ost->st->codec->codec_type == AVMEDIA_TYPE_AUDIO)

                             audio_size += data_size;

                         else if (ost->st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {

                             video_size += data_size;
                             ost->sync_opts++;
                         }
 
                         opkt.stream_index= ost->index;
                         if(pkt->pts != AV_NOPTS_VALUE)

                             opkt.pts= av_rescale_q(pkt->pts, ist->st->time_base, ost->st->time_base) - ost_tb_start_time;

                         else
                             opkt.pts= AV_NOPTS_VALUE;
 

                         if (pkt->dts == AV_NOPTS_VALUE)

                             opkt.dts = av_rescale_q(ist->pts, AV_TIME_BASE_Q, ost->st->time_base);

                         else
                             opkt.dts = av_rescale_q(pkt->dts, ist->st->time_base, ost->st->time_base);

                         opkt.dts -= ost_tb_start_time;

                         opkt.duration = av_rescale_q(pkt->duration, ist->st->time_base, ost->st->time_base);

                         opkt.flags= pkt->flags;
 
                         //FIXME remove the following 2 lines they shall be replaced by the bitstream filters

                         if(   ost->st->codec->codec_id != CODEC_ID_H264
                            && ost->st->codec->codec_id != CODEC_ID_MPEG1VIDEO
                            && ost->st->codec->codec_id != CODEC_ID_MPEG2VIDEO
                            ) {

                             if(av_parser_change(ist->st->parser, ost->st->codec, &opkt.data, &opkt.size, data_buf, data_size, pkt->flags & AV_PKT_FLAG_KEY))

                                 opkt.destruct= av_destruct_packet;

                         } else {
                             opkt.data = data_buf;
                             opkt.size = data_size;
                         }

                         if (os->oformat->flags & AVFMT_RAWPICTURE) {
                             /* store AVPicture in AVPacket, as expected by the output format */
                             avpicture_fill(&pict, opkt.data, ost->st->codec->pix_fmt, ost->st->codec->width, ost->st->codec->height);
                             opkt.data = (uint8_t *)&pict;
                             opkt.size = sizeof(AVPicture);
                             opkt.flags |= AV_PKT_FLAG_KEY;
                         }

                         write_frame(os, &opkt, ost->st->codec, ost->bitstream_filters);

                         ost->st->codec->frame_number++;
                         ost->frame_number++;
                         av_free_packet(&opkt);

                     }

 #if CONFIG_AVFILTER

                     cont:

                     frame_available = (ist->st->codec->codec_type == AVMEDIA_TYPE_VIDEO) &&
                                        ost->output_video_filter && avfilter_poll_frame(ost->output_video_filter->inputs[0]);

                     avfilter_unref_buffer(ost->picref);

                 }
 #endif

                 }

             }

         av_free(buffer_to_free);
         /* XXX: allocate the subtitles in the codec ? */
         if (subtitle_to_free) {

             avsubtitle_free(subtitle_to_free);

             subtitle_to_free = NULL;

         }

     }

  discard_packet:

     if (pkt == NULL) {
         /* EOF handling */

         for(i=0;i<nb_ostreams;i++) {
             ost = ost_table[i];
             if (ost->source_index == ist_index) {

                 AVCodecContext *enc= ost->st->codec;

                 os = output_files[ost->file_index];

                 if(ost->st->codec->codec_type == AVMEDIA_TYPE_AUDIO && enc->frame_size <=1)

                     continue;

                 if(ost->st->codec->codec_type == AVMEDIA_TYPE_VIDEO && (os->oformat->flags & AVFMT_RAWPICTURE))

                     continue;
 
                 if (ost->encoding_needed) {
                     for(;;) {
                         AVPacket pkt;

                         int fifo_bytes;

                         av_init_packet(&pkt);
                         pkt.stream_index= ost->index;

                         switch(ost->st->codec->codec_type) {

                         case AVMEDIA_TYPE_AUDIO:

                             fifo_bytes = av_fifo_size(ost->fifo);

                             ret = 0;
                             /* encode any samples remaining in fifo */

                             if (fifo_bytes > 0) {

                                 int osize = av_get_bytes_per_sample(enc->sample_fmt);

                                 int fs_tmp = enc->frame_size;

                                 av_fifo_generic_read(ost->fifo, audio_buf, fifo_bytes, NULL);

                                 if (enc->codec->capabilities & CODEC_CAP_SMALL_LAST_FRAME) {
                                     enc->frame_size = fifo_bytes / (osize * enc->channels);
                                 } else { /* pad */
                                     int frame_bytes = enc->frame_size*osize*enc->channels;

                                     if (allocated_audio_buf_size < frame_bytes)

                                         ffmpeg_exit(1);

                                     generate_silence(audio_buf+fifo_bytes, enc->sample_fmt, frame_bytes - fifo_bytes);

                                 }
 

                                 ret = avcodec_encode_audio(enc, bit_buffer, bit_buffer_size, (short *)audio_buf);

                                 pkt.duration = av_rescale((int64_t)enc->frame_size*ost->st->time_base.den,
                                                           ost->st->time_base.num, enc->sample_rate);

                                 enc->frame_size = fs_tmp;

                             }
                             if(ret <= 0) {

                                 ret = avcodec_encode_audio(enc, bit_buffer, bit_buffer_size, NULL);
                             }

                             if (ret < 0) {
                                 fprintf(stderr, "Audio encoding failed\n");

                                 ffmpeg_exit(1);

                             }

                             audio_size += ret;

                             pkt.flags |= AV_PKT_FLAG_KEY;

                             break;

                         case AVMEDIA_TYPE_VIDEO:

                             ret = avcodec_encode_video(enc, bit_buffer, bit_buffer_size, NULL);

                             if (ret < 0) {
                                 fprintf(stderr, "Video encoding failed\n");

                                 ffmpeg_exit(1);

                             }

                             video_size += ret;
                             if(enc->coded_frame && enc->coded_frame->key_frame)

                                 pkt.flags |= AV_PKT_FLAG_KEY;

                             if (ost->logfile && enc->stats_out) {
                                 fprintf(ost->logfile, "%s", enc->stats_out);
                             }
                             break;
                         default:
                             ret=-1;
                         }

                         if(ret<=0)
                             break;

                         pkt.data= bit_buffer;

                         pkt.size= ret;

                         if(enc->coded_frame && enc->coded_frame->pts != AV_NOPTS_VALUE)

                             pkt.pts= av_rescale_q(enc->coded_frame->pts, enc->time_base, ost->st->time_base);

                         write_frame(os, &pkt, ost->st->codec, ost->bitstream_filters);

                     }
                 }
             }
         }
     }

     return 0;
  fail_decode:
     return -1;
 }
 

 static void print_sdp(AVFormatContext **avc, int n)
 {
     char sdp[2048];
 

     av_sdp_create(avc, n, sdp, sizeof(sdp));

     printf("SDP:\n%s\n", sdp);

     fflush(stdout);

 }

 static int copy_chapters(int infile, int outfile)
 {

     AVFormatContext *is = input_files[infile].ctx;

     AVFormatContext *os = output_files[outfile];
     int i;
 
     for (i = 0; i < is->nb_chapters; i++) {
         AVChapter *in_ch = is->chapters[i], *out_ch;
         int64_t ts_off   = av_rescale_q(start_time - input_files_ts_offset[infile],
                                       AV_TIME_BASE_Q, in_ch->time_base);
         int64_t rt       = (recording_time == INT64_MAX) ? INT64_MAX :
                            av_rescale_q(recording_time, AV_TIME_BASE_Q, in_ch->time_base);
 
 
         if (in_ch->end < ts_off)
             continue;
         if (rt != INT64_MAX && in_ch->start > rt + ts_off)
             break;
 
         out_ch = av_mallocz(sizeof(AVChapter));
         if (!out_ch)
             return AVERROR(ENOMEM);
 
         out_ch->id        = in_ch->id;
         out_ch->time_base = in_ch->time_base;
         out_ch->start     = FFMAX(0,  in_ch->start - ts_off);
         out_ch->end       = FFMIN(rt, in_ch->end   - ts_off);
 

         if (metadata_chapters_autocopy)

             av_dict_copy(&out_ch->metadata, in_ch->metadata, 0);

 
         os->nb_chapters++;
         os->chapters = av_realloc(os->chapters, sizeof(AVChapter)*os->nb_chapters);
         if (!os->chapters)
             return AVERROR(ENOMEM);
         os->chapters[os->nb_chapters - 1] = out_ch;
     }
     return 0;
 }
 

 static void parse_forced_key_frames(char *kf, AVOutputStream *ost,
                                     AVCodecContext *avctx)
 {
     char *p;
     int n = 1, i;
     int64_t t;
 
     for (p = kf; *p; p++)
         if (*p == ',')
             n++;
     ost->forced_kf_count = n;
     ost->forced_kf_pts = av_malloc(sizeof(*ost->forced_kf_pts) * n);
     if (!ost->forced_kf_pts) {
         av_log(NULL, AV_LOG_FATAL, "Could not allocate forced key frames array.\n");
         ffmpeg_exit(1);
     }
     for (i = 0; i < n; i++) {
         p = i ? strchr(p, ',') + 1 : kf;
         t = parse_time_or_die("force_key_frames", p, 1);
         ost->forced_kf_pts[i] = av_rescale_q(t, AV_TIME_BASE_Q, avctx->time_base);
     }
 }
 

 /*
  * The following code is the main loop of the file converter
  */

 static int transcode(AVFormatContext **output_files,

                      int nb_output_files,

                      AVInputFile *input_files,

                      int nb_input_files,
                      AVStreamMap *stream_maps, int nb_stream_maps)

 {

     int ret = 0, i, j, k, n, nb_ostreams = 0, step;

     AVFormatContext *is, *os;
     AVCodecContext *codec, *icodec;
     AVOutputStream *ost, **ost_table = NULL;

     AVInputStream *ist;

     char error[1024];

     int key;

     int want_sdp = 1;

     uint8_t no_packet[MAX_FILES]={0};
     int no_packet_count=0;

     int nb_frame_threshold[AVMEDIA_TYPE_NB]={0};
     int nb_streams[AVMEDIA_TYPE_NB]={0};

     if (rate_emu)
         for (i = 0; i < nb_input_streams; i++)
             input_streams[i].start = av_gettime();

 
     /* output stream init */
     nb_ostreams = 0;
     for(i=0;i<nb_output_files;i++) {
         os = output_files[i];

         if (!os->nb_streams && !(os->oformat->flags & AVFMT_NOSTREAMS)) {

             av_dump_format(output_files[i], i, output_files[i]->filename, 1);

             fprintf(stderr, "Output file #%d does not contain any stream\n", i);

             ret = AVERROR(EINVAL);
             goto fail;

         }

         nb_ostreams += os->nb_streams;
     }
     if (nb_stream_maps > 0 && nb_stream_maps != nb_ostreams) {
         fprintf(stderr, "Number of stream maps must match number of output streams\n");

         ret = AVERROR(EINVAL);
         goto fail;

     }
 

     /* Sanity check the mapping args -- do the input files & streams exist? */
     for(i=0;i<nb_stream_maps;i++) {
         int fi = stream_maps[i].file_index;
         int si = stream_maps[i].stream_index;

         if (fi < 0 || fi > nb_input_files - 1 ||

             si < 0 || si > input_files[fi].nb_streams - 1) {

             fprintf(stderr,"Could not find input stream #%d.%d\n", fi, si);

             ret = AVERROR(EINVAL);
             goto fail;

         }

         fi = stream_maps[i].sync_file_index;
         si = stream_maps[i].sync_stream_index;
         if (fi < 0 || fi > nb_input_files - 1 ||

             si < 0 || si > input_files[fi].nb_streams - 1) {

             fprintf(stderr,"Could not find sync stream #%d.%d\n", fi, si);

             ret = AVERROR(EINVAL);
             goto fail;

         }

     }

     ost_table = av_mallocz(sizeof(AVOutputStream *) * nb_ostreams);
     if (!ost_table)
         goto fail;

 
     for(k=0;k<nb_output_files;k++) {
         os = output_files[k];
         for(i=0;i<os->nb_streams;i++,n++) {
             nb_streams[os->streams[i]->codec->codec_type]++;
         }
     }
     for(step=1<<30; step; step>>=1){
         int found_streams[AVMEDIA_TYPE_NB]={0};
         for(j=0; j<AVMEDIA_TYPE_NB; j++)
             nb_frame_threshold[j] += step;
 

         for(j=0; j<nb_input_streams; j++) {

             int skip=0;

             ist = &input_streams[j];

             if(opt_programid){
                 int pi,si;

                 AVFormatContext *f= input_files[ ist->file_index ].ctx;

                 skip=1;
                 for(pi=0; pi<f->nb_programs; pi++){
                     AVProgram *p= f->programs[pi];
                     if(p->id == opt_programid)
                         for(si=0; si<p->nb_stream_indexes; si++){
                             if(f->streams[ p->stream_index[si] ] == ist->st)
                                 skip=0;
                         }
                 }
             }
             if (ist->discard && ist->st->discard != AVDISCARD_ALL && !skip
                 && nb_frame_threshold[ist->st->codec->codec_type] <= ist->st->codec_info_nb_frames){
                 found_streams[ist->st->codec->codec_type]++;
             }
         }
         for(j=0; j<AVMEDIA_TYPE_NB; j++)
             if(found_streams[j] < nb_streams[j])
                 nb_frame_threshold[j] -= step;
     }

     n = 0;
     for(k=0;k<nb_output_files;k++) {
         os = output_files[k];

         for(i=0;i<os->nb_streams;i++,n++) {

             int found;

             ost = ost_table[n] = output_streams_for_file[k][i];

             ost->st = os->streams[i];
             if (nb_stream_maps > 0) {

                 ost->source_index = input_files[stream_maps[n].file_index].ist_index +

                     stream_maps[n].stream_index;

                 /* Sanity check that the stream types match */

                 if (input_streams[ost->source_index].st->codec->codec_type != ost->st->codec->codec_type) {

                     int i= ost->file_index;

                     av_dump_format(output_files[i], i, output_files[i]->filename, 1);

                     fprintf(stderr, "Codec type mismatch for mapping #%d.%d -> #%d.%d\n",

                         stream_maps[n].file_index, stream_maps[n].stream_index,

                         ost->file_index, ost->index);

                     ffmpeg_exit(1);

                 }

             } else {

                 /* get corresponding input stream index : we select the first one with the right type */
                 found = 0;

                 for (j = 0; j < nb_input_streams; j++) {

                     int skip=0;

                     ist = &input_streams[j];

                     if(opt_programid){
                         int pi,si;

                         AVFormatContext *f = input_files[ist->file_index].ctx;

                         skip=1;
                         for(pi=0; pi<f->nb_programs; pi++){
                             AVProgram *p= f->programs[pi];
                             if(p->id == opt_programid)
                                 for(si=0; si<p->nb_stream_indexes; si++){
                                     if(f->streams[ p->stream_index[si] ] == ist->st)
                                         skip=0;
                                 }

                         }

                     }
                     if (ist->discard && ist->st->discard != AVDISCARD_ALL && !skip &&

                         ist->st->codec->codec_type == ost->st->codec->codec_type &&
                         nb_frame_threshold[ist->st->codec->codec_type] <= ist->st->codec_info_nb_frames) {

                             ost->source_index = j;
                             found = 1;

                             break;

                     }

                 }

 
                 if (!found) {
                     if(! opt_programid) {
                         /* try again and reuse existing stream */

                         for (j = 0; j < nb_input_streams; j++) {
                             ist = &input_streams[j];

                             if (   ist->st->codec->codec_type == ost->st->codec->codec_type
                                 && ist->st->discard != AVDISCARD_ALL) {

                                 ost->source_index = j;
                                 found = 1;
                             }
                         }

                     }

                     if (!found) {

                         int i= ost->file_index;

                         av_dump_format(output_files[i], i, output_files[i]->filename, 1);

                         fprintf(stderr, "Could not find input stream matching output stream #%d.%d\n",
                                 ost->file_index, ost->index);

                         ffmpeg_exit(1);

                     }
                 }
             }

             ist = &input_streams[ost->source_index];

             ist->discard = 0;

             ost->sync_ist = (nb_stream_maps > 0) ?

                 &input_streams[input_files[stream_maps[n].sync_file_index].ist_index +

                          stream_maps[n].sync_stream_index] : ist;

         }
     }
 
     /* for each output stream, we compute the right encoding parameters */
     for(i=0;i<nb_ostreams;i++) {
         ost = ost_table[i];

         os = output_files[ost->file_index];

         ist = &input_streams[ost->source_index];

         codec = ost->st->codec;
         icodec = ist->st->codec;

         if (metadata_streams_autocopy)

             av_dict_copy(&ost->st->metadata, ist->st->metadata,
                          AV_DICT_DONT_OVERWRITE);

         ost->st->disposition = ist->st->disposition;

         codec->bits_per_raw_sample= icodec->bits_per_raw_sample;

         codec->chroma_sample_location = icodec->chroma_sample_location;

         if (ost->st->stream_copy) {

             uint64_t extra_size = (uint64_t)icodec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE;
 
             if (extra_size > INT_MAX)
                 goto fail;
 

             /* if stream_copy is selected, no need to decode or encode */
             codec->codec_id = icodec->codec_id;
             codec->codec_type = icodec->codec_type;

 
             if(!codec->codec_tag){
                 if(   !os->oformat->codec_tag

                    || av_codec_get_id (os->oformat->codec_tag, icodec->codec_tag) == codec->codec_id

                    || av_codec_get_tag(os->oformat->codec_tag, icodec->codec_id) <= 0)
                     codec->codec_tag = icodec->codec_tag;
             }
 

             codec->bit_rate = icodec->bit_rate;

             codec->rc_max_rate    = icodec->rc_max_rate;
             codec->rc_buffer_size = icodec->rc_buffer_size;

             codec->extradata= av_mallocz(extra_size);
             if (!codec->extradata)
                 goto fail;
             memcpy(codec->extradata, icodec->extradata, icodec->extradata_size);

             codec->extradata_size= icodec->extradata_size;

             if(!copy_tb && av_q2d(icodec->time_base)*icodec->ticks_per_frame > av_q2d(ist->st->time_base) && av_q2d(ist->st->time_base) < 1.0/500){

                 codec->time_base = icodec->time_base;

                 codec->time_base.num *= icodec->ticks_per_frame;

                 av_reduce(&codec->time_base.num, &codec->time_base.den,
                           codec->time_base.num, codec->time_base.den, INT_MAX);

             }else

                 codec->time_base = ist->st->time_base;

             switch(codec->codec_type) {

             case AVMEDIA_TYPE_AUDIO:

                 if(audio_volume != 256) {
                     fprintf(stderr,"-acodec copy and -vol are incompatible (frames are not decoded)\n");

                     ffmpeg_exit(1);

                 }

                 codec->channel_layout = icodec->channel_layout;

                 codec->sample_rate = icodec->sample_rate;
                 codec->channels = icodec->channels;

                 codec->frame_size = icodec->frame_size;

                 codec->audio_service_type = icodec->audio_service_type;

                 codec->block_align= icodec->block_align;

                 if(codec->block_align == 1 && codec->codec_id == CODEC_ID_MP3)
                     codec->block_align= 0;

                 if(codec->codec_id == CODEC_ID_AC3)
                     codec->block_align= 0;

                 break;

             case AVMEDIA_TYPE_VIDEO:

                 codec->pix_fmt = icodec->pix_fmt;

                 codec->width = icodec->width;
                 codec->height = icodec->height;

                 codec->has_b_frames = icodec->has_b_frames;

                 if (!codec->sample_aspect_ratio.num) {
                     codec->sample_aspect_ratio =
                     ost->st->sample_aspect_ratio =
                         ist->st->sample_aspect_ratio.num ? ist->st->sample_aspect_ratio :
                         ist->st->codec->sample_aspect_ratio.num ?
                         ist->st->codec->sample_aspect_ratio : (AVRational){0, 1};
                 }

                 break;

             case AVMEDIA_TYPE_SUBTITLE:

                 codec->width = icodec->width;
                 codec->height = icodec->height;

                 break;

             case AVMEDIA_TYPE_DATA:
                 break;

             default:

                 abort();

             }
         } else {

             if (!ost->enc)
                 ost->enc = avcodec_find_encoder(ost->st->codec->codec_id);

             switch(codec->codec_type) {

             case AVMEDIA_TYPE_AUDIO:

                 ost->fifo= av_fifo_alloc(1024);
                 if(!ost->fifo)

                     goto fail;

                 ost->reformat_pair = MAKE_SFMT_PAIR(AV_SAMPLE_FMT_NONE,AV_SAMPLE_FMT_NONE);

                 if (!codec->sample_rate) {
                     codec->sample_rate = icodec->sample_rate;
                     if (icodec->lowres)
                         codec->sample_rate >>= icodec->lowres;
                 }

                 choose_sample_rate(ost->st, ost->enc);

                 codec->time_base = (AVRational){1, codec->sample_rate};

                 if (!codec->channels)
                     codec->channels = icodec->channels;
                 if (av_get_channel_layout_nb_channels(codec->channel_layout) != codec->channels)
                     codec->channel_layout = 0;

                 ost->audio_resample = codec->sample_rate != icodec->sample_rate || audio_sync_method > 1;
                 icodec->request_channels = codec->channels;

                 ist->decoding_needed = 1;
                 ost->encoding_needed = 1;

                 ost->resample_sample_fmt  = icodec->sample_fmt;
                 ost->resample_sample_rate = icodec->sample_rate;
                 ost->resample_channels    = icodec->channels;

                 break;

             case AVMEDIA_TYPE_VIDEO:

                 if (codec->pix_fmt == PIX_FMT_NONE)
                     codec->pix_fmt = icodec->pix_fmt;
                 choose_pixel_fmt(ost->st, ost->enc);
 

                 if (ost->st->codec->pix_fmt == PIX_FMT_NONE) {

                     fprintf(stderr, "Video pixel format is unknown, stream cannot be encoded\n");

                     ffmpeg_exit(1);

                 }

 
                 if (!codec->width || !codec->height) {
                     codec->width  = icodec->width;
                     codec->height = icodec->height;
                 }
 

                 ost->video_resample = codec->width   != icodec->width  ||
                                       codec->height  != icodec->height ||
                                       codec->pix_fmt != icodec->pix_fmt;

                 if (ost->video_resample) {

                     codec->bits_per_raw_sample= frame_bits_per_raw_sample;

                 }

                 ost->resample_height = icodec->height;
                 ost->resample_width  = icodec->width;

                 ost->resample_pix_fmt= icodec->pix_fmt;

                 ost->encoding_needed = 1;
                 ist->decoding_needed = 1;

                 if (!ost->frame_rate.num)
                     ost->frame_rate = ist->st->r_frame_rate.num ? ist->st->r_frame_rate : (AVRational){25,1};

                 if (ost->enc && ost->enc->supported_framerates && !force_fps) {
                     int idx = av_find_nearest_q_idx(ost->frame_rate, ost->enc->supported_framerates);
                     ost->frame_rate = ost->enc->supported_framerates[idx];

                 }
                 codec->time_base = (AVRational){ost->frame_rate.den, ost->frame_rate.num};

                 if(   av_q2d(codec->time_base) < 0.001 && video_sync_method
                    && (video_sync_method==1 || (video_sync_method<0 && !(os->oformat->flags & AVFMT_VARIABLE_FPS)))){
                     av_log(os, AV_LOG_WARNING, "Frame rate very high for a muxer not effciciently supporting it.\n"
                                                "Please consider specifiying a lower framerate, a different muxer or -vsync 2\n");
                 }

 #if CONFIG_AVFILTER

                 if (configure_video_filters(ist, ost)) {

                     fprintf(stderr, "Error opening filters!\n");
                     exit(1);
                 }
 #endif

                 break;

             case AVMEDIA_TYPE_SUBTITLE:

                 ost->encoding_needed = 1;
                 ist->decoding_needed = 1;
                 break;

             default:

                 abort();

                 break;

             }

             /* two pass mode */

             if (ost->encoding_needed && codec->codec_id != CODEC_ID_H264 &&

                 (codec->flags & (CODEC_FLAG_PASS1 | CODEC_FLAG_PASS2))) {
                 char logfilename[1024];
                 FILE *f;

 
                 snprintf(logfilename, sizeof(logfilename), "%s-%d.log",

                          pass_logfilename_prefix ? pass_logfilename_prefix : DEFAULT_PASS_LOGFILENAME_PREFIX,
                          i);

                 if (codec->flags & CODEC_FLAG_PASS1) {

                     f = fopen(logfilename, "wb");

                     if (!f) {

                         fprintf(stderr, "Cannot write log file '%s' for pass-1 encoding: %s\n", logfilename, strerror(errno));

                         ffmpeg_exit(1);

                     }
                     ost->logfile = f;
                 } else {

                     char  *logbuffer;
                     size_t logbuffer_size;
                     if (read_file(logfilename, &logbuffer, &logbuffer_size) < 0) {
                         fprintf(stderr, "Error reading log file '%s' for pass-2 encoding\n", logfilename);

                         ffmpeg_exit(1);

                     }
                     codec->stats_in = logbuffer;

                 }
             }
         }

         if(codec->codec_type == AVMEDIA_TYPE_VIDEO){

             /* maximum video buffer size is 6-bytes per pixel, plus DPX header size (1664)*/

             int size= codec->width * codec->height;

             bit_buffer_size= FFMAX(bit_buffer_size, 7*size + 10000);

         }

     }
 

     if (!bit_buffer)
         bit_buffer = av_malloc(bit_buffer_size);

     if (!bit_buffer) {

         fprintf(stderr, "Cannot allocate %d bytes output buffer\n",
                 bit_buffer_size);

         ret = AVERROR(ENOMEM);

         goto fail;

     }
 

     /* open each encoder */
     for(i=0;i<nb_ostreams;i++) {
         ost = ost_table[i];
         if (ost->encoding_needed) {

             AVCodec *codec = ost->enc;

             AVCodecContext *dec = input_streams[ost->source_index].st->codec;

             if (!codec) {

                 snprintf(error, sizeof(error), "Encoder (codec id %d) not found for output stream #%d.%d",
                          ost->st->codec->codec_id, ost->file_index, ost->index);

                 ret = AVERROR(EINVAL);
                 goto dump_format;

             }

             if (dec->subtitle_header) {
                 ost->st->codec->subtitle_header = av_malloc(dec->subtitle_header_size);
                 if (!ost->st->codec->subtitle_header) {
                     ret = AVERROR(ENOMEM);
                     goto dump_format;
                 }
                 memcpy(ost->st->codec->subtitle_header, dec->subtitle_header, dec->subtitle_header_size);
                 ost->st->codec->subtitle_header_size = dec->subtitle_header_size;
             }

             if (avcodec_open(ost->st->codec, codec) < 0) {

                 snprintf(error, sizeof(error), "Error while opening encoder for output stream #%d.%d - maybe incorrect parameters such as bit_rate, rate, width or height",

                         ost->file_index, ost->index);

                 ret = AVERROR(EINVAL);
                 goto dump_format;

             }

             extra_size += ost->st->codec->extradata_size;

         }
     }
 
     /* open each decoder */

     for (i = 0; i < nb_input_streams; i++) {
         ist = &input_streams[i];

         if (ist->decoding_needed) {

             AVCodec *codec = i < nb_input_codecs ? input_codecs[i] : NULL;

             if (!codec)

                 codec = avcodec_find_decoder(ist->st->codec->codec_id);

             if (!codec) {

                 snprintf(error, sizeof(error), "Decoder (codec id %d) not found for input stream #%d.%d",

                         ist->st->codec->codec_id, ist->file_index, ist->st->index);

                 ret = AVERROR(EINVAL);
                 goto dump_format;

             }

             if (avcodec_open(ist->st->codec, codec) < 0) {

                 snprintf(error, sizeof(error), "Error while opening decoder for input stream #%d.%d",

                         ist->file_index, ist->st->index);

                 ret = AVERROR(EINVAL);
                 goto dump_format;

             }

             //if (ist->st->codec->codec_type == AVMEDIA_TYPE_VIDEO)

             //    ist->st->codec->flags |= CODEC_FLAG_REPEAT_FIELD;

         }
     }
 
     /* init pts */

     for (i = 0; i < nb_input_streams; i++) {

         AVStream *st;

         ist = &input_streams[i];

         st= ist->st;
         ist->pts = st->avg_frame_rate.num ? - st->codec->has_b_frames*AV_TIME_BASE / av_q2d(st->avg_frame_rate) : 0;

         ist->next_pts = AV_NOPTS_VALUE;

         ist->is_start = 1;

     }

     /* set meta data information from input file if required */
     for (i=0;i<nb_meta_data_maps;i++) {

         AVFormatContext *files[2];

         AVDictionary    **meta[2];

         int j;

 #define METADATA_CHECK_INDEX(index, nb_elems, desc)\
         if ((index) < 0 || (index) >= (nb_elems)) {\
             snprintf(error, sizeof(error), "Invalid %s index %d while processing metadata maps\n",\
                      (desc), (index));\
             ret = AVERROR(EINVAL);\
             goto dump_format;\

         }
 

         int out_file_index = meta_data_maps[i][0].file;
         int in_file_index = meta_data_maps[i][1].file;

         if (in_file_index < 0 || out_file_index < 0)
             continue;

         METADATA_CHECK_INDEX(out_file_index, nb_output_files, "output file")
         METADATA_CHECK_INDEX(in_file_index, nb_input_files, "input file")

         files[0] = output_files[out_file_index];

         files[1] = input_files[in_file_index].ctx;

 
         for (j = 0; j < 2; j++) {
             AVMetaDataMap *map = &meta_data_maps[i][j];
 
             switch (map->type) {
             case 'g':
                 meta[j] = &files[j]->metadata;
                 break;
             case 's':
                 METADATA_CHECK_INDEX(map->index, files[j]->nb_streams, "stream")
                 meta[j] = &files[j]->streams[map->index]->metadata;
                 break;
             case 'c':
                 METADATA_CHECK_INDEX(map->index, files[j]->nb_chapters, "chapter")
                 meta[j] = &files[j]->chapters[map->index]->metadata;
                 break;
             case 'p':
                 METADATA_CHECK_INDEX(map->index, files[j]->nb_programs, "program")
                 meta[j] = &files[j]->programs[map->index]->metadata;
                 break;
             }
         }

         av_dict_copy(meta[0], *meta[1], AV_DICT_DONT_OVERWRITE);

     }

     /* copy global metadata by default */
     if (metadata_global_autocopy) {
 

         for (i = 0; i < nb_output_files; i++)

             av_dict_copy(&output_files[i]->metadata, input_files[0].ctx->metadata,
                          AV_DICT_DONT_OVERWRITE);

     }
 

     /* copy chapters according to chapter maps */
     for (i = 0; i < nb_chapter_maps; i++) {
         int infile  = chapter_maps[i].in_file;
         int outfile = chapter_maps[i].out_file;
 
         if (infile < 0 || outfile < 0)
             continue;
         if (infile >= nb_input_files) {
             snprintf(error, sizeof(error), "Invalid input file index %d in chapter mapping.\n", infile);
             ret = AVERROR(EINVAL);
             goto dump_format;
         }
         if (outfile >= nb_output_files) {
             snprintf(error, sizeof(error), "Invalid output file index %d in chapter mapping.\n",outfile);
             ret = AVERROR(EINVAL);
             goto dump_format;
         }
         copy_chapters(infile, outfile);
     }
 

     /* copy chapters from the first input file that has them*/

     if (!nb_chapter_maps)

         for (i = 0; i < nb_input_files; i++) {

             if (!input_files[i].ctx->nb_chapters)

                 continue;

             for (j = 0; j < nb_output_files; j++)
                 if ((ret = copy_chapters(i, j)) < 0)
                     goto dump_format;

             break;

         }

     /* open files and write file headers */
     for(i=0;i<nb_output_files;i++) {
         os = output_files[i];

         if (av_write_header(os) < 0) {

             snprintf(error, sizeof(error), "Could not write header for output file #%d (incorrect codec parameters ?)", i);

             ret = AVERROR(EINVAL);

             goto dump_format;

         }

         if (strcmp(output_files[i]->oformat->name, "rtp")) {
             want_sdp = 0;
         }
     }

 
  dump_format:
     /* dump the file output parameters - cannot be done before in case
        of stream copy */
     for(i=0;i<nb_output_files;i++) {

         av_dump_format(output_files[i], i, output_files[i]->filename, 1);

     }
 
     /* dump the stream mapping */
     if (verbose >= 0) {
         fprintf(stderr, "Stream mapping:\n");
         for(i=0;i<nb_ostreams;i++) {
             ost = ost_table[i];
             fprintf(stderr, "  Stream #%d.%d -> #%d.%d",

                     input_streams[ost->source_index].file_index,
                     input_streams[ost->source_index].st->index,

                     ost->file_index,
                     ost->index);

             if (ost->sync_ist != &input_streams[ost->source_index])

                 fprintf(stderr, " [sync #%d.%d]",
                         ost->sync_ist->file_index,

                         ost->sync_ist->st->index);

             fprintf(stderr, "\n");
         }
     }
 
     if (ret) {
         fprintf(stderr, "%s\n", error);
         goto fail;
     }
 

     if (want_sdp) {
         print_sdp(output_files, nb_output_files);

     }
 

     if (!using_stdin) {
         if(verbose >= 0)

             fprintf(stderr, "Press [q] to stop, [?] for help\n");

         avio_set_interrupt_cb(decode_interrupt_cb);

     }

     term_init();
 

     timer_start = av_gettime();

     for(; received_sigterm == 0;) {

         int file_index, ist_index;
         AVPacket pkt;

         double ipts_min;
         double opts_min;

     redo:

         ipts_min= 1e100;
         opts_min= 1e100;

         /* if 'q' pressed, exits */

         if (!using_stdin) {

             if (q_pressed)
                 break;

             /* read_key() returns 0 on EOF */
             key = read_key();
             if (key == 'q')
                 break;

             if (key == '+') verbose++;
             if (key == '-') verbose--;
             if (key == 's') qp_hist     ^= 1;
             if (key == 'h'){
                 if (do_hex_dump){
                     do_hex_dump = do_pkt_dump = 0;
                 } else if(do_pkt_dump){
                     do_hex_dump = 1;
                 } else
                     do_pkt_dump = 1;
                 av_log_set_level(AV_LOG_DEBUG);
             }

             if (key == 'd' || key == 'D'){
                 int debug=0;
                 if(key == 'D') {

                     debug = input_streams[0].st->codec->debug<<1;

                     if(!debug) debug = 1;
                     while(debug & (FF_DEBUG_DCT_COEFF|FF_DEBUG_VIS_QP|FF_DEBUG_VIS_MB_TYPE)) //unsupported, would just crash
                         debug += debug;
                 }else
                     scanf("%d", &debug);

                 for(i=0;i<nb_input_streams;i++) {
                     input_streams[i].st->codec->debug = debug;

                 }
                 for(i=0;i<nb_ostreams;i++) {
                     ost = ost_table[i];
                     ost->st->codec->debug = debug;
                 }
                 if(debug) av_log_set_level(AV_LOG_DEBUG);
                 fprintf(stderr,"debug=%d\n", debug);
             }

             if (key == '?'){
                 fprintf(stderr, "key    function\n"
                                 "?      show this help\n"
                                 "+      increase verbosity\n"
                                 "-      decrease verbosity\n"

                                 "D      cycle through available debug modes\n"

                                 "h      dump packets/hex press to cycle through the 3 states\n"
                                 "q      quit\n"
                                 "s      Show QP histogram\n"
                 );
             }

         }

         /* select the stream that we must read now by looking at the
            smallest output pts */

         file_index = -1;

         for(i=0;i<nb_ostreams;i++) {

             double ipts, opts;

             ost = ost_table[i];
             os = output_files[ost->file_index];

             ist = &input_streams[ost->source_index];

             if(ist->is_past_recording_time || no_packet[ist->file_index])

                 continue;

                 opts = ost->st->pts.val * av_q2d(ost->st->time_base);

             ipts = (double)ist->pts;

             if (!input_files[ist->file_index].eof_reached){

                 if(ipts < ipts_min) {
                     ipts_min = ipts;
                     if(input_sync ) file_index = ist->file_index;
                 }
                 if(opts < opts_min) {
                     opts_min = opts;
                     if(!input_sync) file_index = ist->file_index;
                 }

             }

             if(ost->frame_number >= max_frames[ost->st->codec->codec_type]){

                 file_index= -1;
                 break;
             }

         }
         /* if none, if is finished */

         if (file_index < 0) {

             if(no_packet_count){
                 no_packet_count=0;
                 memset(no_packet, 0, sizeof(no_packet));

                 usleep(10000);

                 continue;
             }

             break;

         }
 

         /* finish if limit size exhausted */

         if (limit_filesize != 0 && limit_filesize <= avio_tell(output_files[0]->pb))

             break;
 

         /* read a frame from it and output it in the fifo */

         is = input_files[file_index].ctx;

         ret= av_read_frame(is, &pkt);

         if(ret == AVERROR(EAGAIN)){

             no_packet[file_index]=1;
             no_packet_count++;

             continue;

         }

         if (ret < 0) {

             input_files[file_index].eof_reached = 1;

             if (opt_shortest)
                 break;
             else
                 continue;