@@ -13,6 +13,9 @@ libavutil:     2011-04-18

 API changes, most recent first:

+2012-07-xx - xxxxxxx - lavf 54.13.0 - avformat.h

+  Add AVFMT_FLAG_NOBUFFER for low latency use cases.

+

 2012-07-xx - xxxxxxx - lavfi 3.0.0 - avfilter.h

   Add avfilter_unref_bufferp().

@@ -887,6 +887,7 @@ typedef struct AVFormatContext {

 #define AVFMT_FLAG_IGNDTS       0x0008 ///< Ignore DTS on frames that contain both DTS & PTS

 #define AVFMT_FLAG_NOFILLIN     0x0010 ///< Do not infer any values from other values, just return what is stored in the container

 #define AVFMT_FLAG_NOPARSE      0x0020 ///< Do not use AVParsers, you also must set AVFMT_FLAG_NOFILLIN as the fillin code works on frames and no parsing -> no frames. Also seeking to frames can not work if parsing to find frame boundaries has been disabled

+#define AVFMT_FLAG_NOBUFFER     0x0040 ///< Do not buffer frames when possible

 #define AVFMT_FLAG_CUSTOM_IO    0x0080 ///< The caller has supplied a custom AVIOContext, don't avio_close() it.

 #define AVFMT_FLAG_DISCARD_CORRUPT  0x0100 ///< Discard frames marked corrupted

@@ -40,6 +40,7 @@ static const AVOption options[]={

 {"noparse", "disable AVParsers, this needs nofillin too", 0, AV_OPT_TYPE_CONST, {.dbl = AVFMT_FLAG_NOPARSE }, INT_MIN, INT_MAX, D, "fflags"},

 {"igndts", "ignore dts", 0, AV_OPT_TYPE_CONST, {.dbl = AVFMT_FLAG_IGNDTS }, INT_MIN, INT_MAX, D, "fflags"},

 {"discardcorrupt", "discard corrupted frames", 0, AV_OPT_TYPE_CONST, {.dbl = AVFMT_FLAG_DISCARD_CORRUPT }, INT_MIN, INT_MAX, D, "fflags"},

+{"nobuffer", "reduce the latency introduced by optional buffering", 0, AV_OPT_TYPE_CONST, {.dbl = AVFMT_FLAG_NOBUFFER }, 0, INT_MAX, D, "fflags"},

 {"analyzeduration", "how many microseconds are analyzed to estimate duration", OFFSET(max_analyze_duration), AV_OPT_TYPE_INT, {.dbl = 5*AV_TIME_BASE }, 0, INT_MAX, D},

 {"cryptokey", "decryption key", OFFSET(key), AV_OPT_TYPE_BINARY, {.dbl = 0}, 0, 0, D},

 {"indexmem", "max memory used for timestamp index (per stream)", OFFSET(max_index_size), AV_OPT_TYPE_INT, {.dbl = 1<<20 }, 0, INT_MAX, D},

@@ -2383,9 +2383,14 @@ int avformat_find_stream_info(AVFormatContext *ic, AVDictionary **options)

             break;

         }

-        pkt= add_to_pktbuf(&ic->packet_buffer, &pkt1, &ic->packet_buffer_end);

-        if ((ret = av_dup_packet(pkt)) < 0)

-            goto find_stream_info_err;

+        if (ic->flags & AVFMT_FLAG_NOBUFFER) {

+            pkt = &pkt1;

+        } else {

+            pkt = add_to_pktbuf(&ic->packet_buffer, &pkt1,

+                                &ic->packet_buffer_end);

+            if ((ret = av_dup_packet(pkt)) < 0)

+                goto find_stream_info_err;

+        }

         read_size += pkt->size;

@@ -30,8 +30,8 @@

 #include "libavutil/avutil.h"

 #define LIBAVFORMAT_VERSION_MAJOR 54

-#define LIBAVFORMAT_VERSION_MINOR 12

-#define LIBAVFORMAT_VERSION_MICRO  1

+#define LIBAVFORMAT_VERSION_MINOR 13

+#define LIBAVFORMAT_VERSION_MICRO  0

 #define LIBAVFORMAT_VERSION_INT AV_VERSION_INT(LIBAVFORMAT_VERSION_MAJOR, \

                                                LIBAVFORMAT_VERSION_MINOR, \