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Code Issues Releases Activity

flvenc: check packet duration in speex using timestamps

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Using AVCodecContext.frame_size is not reliable.
This commit is contained in:
Justin Ruggles 2011-10-19 13:20:15 -04:00
parent b606a01759
commit 4ee247a2bd
1 changed files with 13 additions and 11 deletions
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24
libavformat/flvenc.c
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@ -58,7 +58,7 @@ typedef struct FLVContext {
int64_t filesize_offset;
int64_t duration;
int delay; ///< first dts delay for AVC
int64_t last_video_ts;
int64_t last_ts;
} FLVContext;
static int get_audio_flags(AVCodecContext *enc){
@ -75,11 +75,6 @@ static int get_audio_flags(AVCodecContext *enc){
av_log(enc, AV_LOG_ERROR, "flv only supports mono Speex audio\n");
return -1;
}
if (enc->frame_size / 320 > 8) {
av_log(enc, AV_LOG_WARNING, "Warning: Speex stream has more than "
"8 frames per packet. Adobe Flash "
"Player cannot handle this!\n");
}
return FLV_CODECID_SPEEX | FLV_SAMPLERATE_11025HZ | FLV_SAMPLESSIZE_16BIT;
} else {
switch (enc->sample_rate) {
@ -220,7 +215,7 @@ static int flv_write_header(AVFormatContext *s)
}
}
flv->last_video_ts = -1;
flv->last_ts = -1;
/* write meta_tag */
avio_w8(pb, 18); // tag type META
@ -349,7 +344,7 @@ static int flv_write_trailer(AVFormatContext *s)
AVCodecContext *enc = s->streams[i]->codec;
if (enc->codec_type == AVMEDIA_TYPE_VIDEO &&
enc->codec_id == CODEC_ID_H264) {
put_avc_eos_tag(pb, flv->last_video_ts);
put_avc_eos_tag(pb, flv->last_ts);
}
}
@ -415,10 +410,17 @@ static int flv_write_packet(AVFormatContext *s, AVPacket *pkt)
flv->delay = -pkt->dts;
ts = pkt->dts + flv->delay; // add delay to force positive dts
if (enc->codec_type == AVMEDIA_TYPE_VIDEO) {
if (flv->last_video_ts < ts)
flv->last_video_ts = ts;
/* check Speex packet duration */
if (enc->codec_id == CODEC_ID_SPEEX && ts - flv->last_ts > 160) {
av_log(s, AV_LOG_WARNING, "Warning: Speex stream has more than "
"8 frames per packet. Adobe Flash "
"Player cannot handle this!\n");
}
if (flv->last_ts < ts)
flv->last_ts = ts;
avio_wb24(pb,size + flags_size);
avio_wb24(pb,ts);
avio_w8(pb,(ts >> 24) & 0x7F); // timestamps are 32bits _signed_