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Add AVC EOS tag to H264-encoded FLV files.

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Patch by Thierry Foucu, tfoucu gmail

Originally committed as revision 24820 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Thierry Foucu 2010-08-18 09:39:21 +00:00 committed by Carl Eugen Hoyos
parent 32a15a2441
commit df4f1d5108
1 changed files with 29 additions and 0 deletions
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29
libavformat/flvenc.c
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@ -54,6 +54,7 @@ typedef struct FLVContext {
int64_t filesize_offset;
int64_t duration;
int delay; ///< first dts delay for AVC
int64_t last_video_ts;
} FLVContext;
static int get_audio_flags(AVCodecContext *enc){
@ -144,6 +145,18 @@ static void put_amf_string(ByteIOContext *pb, const char *str)
put_buffer(pb, str, len);
}
static void put_avc_eos_tag(ByteIOContext *pb, unsigned ts) {
put_byte(pb, FLV_TAG_TYPE_VIDEO);
put_be24(pb, 5); /* Tag Data Size */
put_be24(pb, ts); /* lower 24 bits of timestamp in ms*/
put_byte(pb, (ts >> 24) & 0x7F); /* MSB of ts in ms*/
put_be24(pb, 0); /* StreamId = 0 */
put_byte(pb, 23); /* ub[4] FrameType = 1, ub[4] CodecId = 7 */
put_byte(pb, 2); /* AVC end of sequence */
put_be24(pb, 0); /* Always 0 for AVC EOS. */
put_be32(pb, 16); /* Size of FLV tag */
}
static void put_amf_double(ByteIOContext *pb, double d)
{
put_byte(pb, AMF_DATA_TYPE_NUMBER);
@ -202,6 +215,8 @@ static int flv_write_header(AVFormatContext *s)
}
}
flv->last_video_ts = -1;
/* write meta_tag */
put_byte(pb, 18); // tag type META
metadata_size_pos= url_ftell(pb);
@ -309,6 +324,16 @@ static int flv_write_trailer(AVFormatContext *s)
ByteIOContext *pb = s->pb;
FLVContext *flv = s->priv_data;
int i;
/* Add EOS tag */
for (i = 0; i < s->nb_streams; i++) {
AVCodecContext *enc = s->streams[i]->codec;
if (enc->codec_type == CODEC_TYPE_VIDEO &&
enc->codec_id == CODEC_ID_H264) {
put_avc_eos_tag(pb, flv->last_video_ts);
}
}
file_size = url_ftell(pb);
@ -372,6 +397,10 @@ static int flv_write_packet(AVFormatContext *s, AVPacket *pkt)
}
ts = pkt->dts + flv->delay; // add delay to force positive dts
if (enc->codec_type == CODEC_TYPE_VIDEO) {
if (flv->last_video_ts < ts)
flv->last_video_ts = ts;
}
put_be24(pb,size + flags_size);
put_be24(pb,ts);
put_byte(pb,(ts >> 24) & 0x7F); // timestamps are 32bits _signed_