@@ -2979,6 +2979,7 @@ static int opt_qscale(const char *opt, const char *arg)

 static int opt_top_field_first(const char *opt, const char *arg)

 {

     top_field_first = parse_number_or_die(opt, arg, OPT_INT, 0, 1);

+    opt_default(opt, arg);

     return 0;

 }

@@ -29,15 +29,24 @@

 #include "raw.h"

 #include "libavutil/intreadwrite.h"

 #include "libavutil/imgutils.h"

+#include "libavutil/opt.h"

 typedef struct RawVideoContext {

+    AVClass *av_class;

     uint32_t palette[AVPALETTE_COUNT];

     unsigned char * buffer;  /* block of memory for holding one frame */

     int             length;  /* number of bytes in buffer */

     int flip;

     AVFrame pic;             ///< AVCodecContext.coded_frame

+    int tff;

 } RawVideoContext;

+static const AVOption options[]={

+{"top", "top field first", offsetof(RawVideoContext, tff), FF_OPT_TYPE_INT, {.dbl = -1}, -1, 1, AV_OPT_FLAG_DECODING_PARAM|AV_OPT_FLAG_VIDEO_PARAM},

+{NULL}

+};

+static const AVClass class = { "rawdec", NULL, options, LIBAVUTIL_VERSION_INT };

+

 static const PixelFormatTag pix_fmt_bps_avi[] = {

     { PIX_FMT_MONOWHITE, 1 },

     { PIX_FMT_PAL8,    2 },

@@ -130,6 +139,11 @@ static int raw_decode(AVCodecContext *avctx,

     frame->pkt_pts          = avctx->pkt->pts;

     frame->pkt_pos          = avctx->pkt->pos;

+    if(context->tff>=0){

+        frame->interlaced_frame = 1;

+        frame->top_field_first  = context->tff;

+    }

+

     //2bpp and 4bpp raw in avi and mov (yes this is ugly ...)

     if (context->buffer) {

         int i;

@@ -214,4 +228,5 @@ AVCodec ff_rawvideo_decoder = {

     raw_close_decoder,

     raw_decode,

     .long_name = NULL_IF_CONFIG_SMALL("raw video"),

+    .priv_class= &class,

 };