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flvenc: use first packet delay as global delay. 

This keeps the streams sychronized. The packets must be interleaved per-DTS.
This commit is contained in:
Justin Ruggles 2011-10-26 12:43:18 -04:00
parent c2d9a65bc0
commit 905de11907
1 changed files with 12 additions and 5 deletions
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17
libavformat/flvenc.c
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@ -57,10 +57,10 @@ typedef struct FLVContext {
int64_t duration_offset;
int64_t filesize_offset;
int64_t duration;
int64_t delay; ///< first dts delay (needed for AVC & Speex)
} FLVContext;
typedef struct FLVStreamContext {
int delay; ///< first dts delay for each stream (needed for AVC & Speex)
int64_t last_ts; ///< last timestamp for each stream
} FLVStreamContext;
@ -207,6 +207,8 @@ static int flv_write_header(AVFormatContext *s)
s->streams[i]->priv_data = sc;
sc->last_ts = -1;
}
flv->delay = AV_NOPTS_VALUE;
avio_write(pb, "FLV", 3);
avio_w8(pb,1);
avio_w8(pb, FLV_HEADER_FLAG_HASAUDIO * !!audio_enc
@ -416,10 +418,15 @@ static int flv_write_packet(AVFormatContext *s, AVPacket *pkt)
return -1;
}
}
if (!sc->delay && pkt->dts < 0)
sc->delay = -pkt->dts;
if (flv->delay == AV_NOPTS_VALUE)
flv->delay = -pkt->dts;
if (pkt->dts < -flv->delay) {
av_log(s, AV_LOG_WARNING, "Packets are not in the proper order with "
"respect to DTS\n");
return AVERROR(EINVAL);
}
ts = pkt->dts + sc->delay; // add delay to force positive dts
ts = pkt->dts + flv->delay; // add delay to force positive dts
/* check Speex packet duration */
if (enc->codec_id == CODEC_ID_SPEEX && ts - sc->last_ts > 160) {
@ -450,7 +457,7 @@ static int flv_write_packet(AVFormatContext *s, AVPacket *pkt)
avio_write(pb, data ? data : pkt->data, size);
avio_wb32(pb,size+flags_size+11); // previous tag size
flv->duration = FFMAX(flv->duration, pkt->pts + sc->delay + pkt->duration);
flv->duration = FFMAX(flv->duration, pkt->pts + flv->delay + pkt->duration);
avio_flush(pb);