@@ -831,6 +831,7 @@ typedef struct AVStreamInternal AVStreamInternal;
#define AV_DISPOSITION_METADATA 0x40000
#define AV_DISPOSITION_DEPENDENT 0x80000 ///< dependent audio stream (mix_type=0 in mpegts)
#define AV_DISPOSITION_STILL_IMAGE 0x100000 ///< still images in video stream (still_picture_flag=1 in mpegts)
+#define AV_DISPOSITION_URGENT 0x200000 ///< stream which is expected to be shown immediately as received (emergency alert)
/**
* Options for behavior on timestamp wrap detection.
@@ -610,6 +610,8 @@ static void dump_stream_format(const AVFormatContext *ic, int i,
av_log(NULL, AV_LOG_INFO, " (dependent)");
if (st->disposition & AV_DISPOSITION_STILL_IMAGE)
av_log(NULL, AV_LOG_INFO, " (still image)");
+ if (st->disposition & AV_DISPOSITION_URGENT)
+ av_log(NULL, AV_LOG_INFO, " (urgent)");
av_log(NULL, AV_LOG_INFO, "\n");
dump_metadata(NULL, st->metadata, " ");
This patchset introduces AV_DISPOSITION_URGENT disposition flag for marking stuffs which is expected to be shown immediately as received, and adds recognization/remuxing support for ARIB superimpose stream. ARIB superimpose is almost same as ARIB caption but is utilized to transmit emergency alert and newsflash in Japan DTV. Since superimpose is designed to be displayed immediately as received, ARIB superimpose utilizes mpegts private_stream_2 rather than the private_stream_1 that is used by arib_caption, which means superimpose packet doesn't have PTS/DTS (AV_NOPTS_VALUE). Purpose of introducing AV_DISPOSITION_URGENT is mainly: 1) To be able to mark stuffs as "show as received", which could be NOPTS 2) Let ffmpeg-based player to be able to recognize these stuffs such as ARIB superimpose stream, and extract data to render it onto screen 3) Let mpegtsenc to be able to remux ARIB superimpose stream correctly Signed-off-by: zheng qian <xqq@xqq.im> --- libavformat/avformat.h | 1 + libavformat/dump.c | 2 ++ 2 files changed, 3 insertions(+)