av_reduce(&st->codec->time_base.num, &st->codec->time_base.den,
track->default_duration, 1000000000, 30000);
- if(extradata){
- st->codec->extradata = extradata;
- st->codec->extradata_size = extradata_size;
- } else if(track->codec_priv.data && track->codec_priv.size > 0){
- st->codec->extradata = av_mallocz(track->codec_priv.size +
- FF_INPUT_BUFFER_PADDING_SIZE);
- if(st->codec->extradata == NULL)
- return AVERROR(ENOMEM);
- st->codec->extradata_size = track->codec_priv.size;
- memcpy(st->codec->extradata,
- track->codec_priv.data + extradata_offset,
- track->codec_priv.size);
+ if (!st->codec->extradata) {
+ if(extradata){
+ st->codec->extradata = extradata;
+ st->codec->extradata_size = extradata_size;
+ } else if(track->codec_priv.data && track->codec_priv.size > 0){
+ st->codec->extradata = av_mallocz(track->codec_priv.size +
+ FF_INPUT_BUFFER_PADDING_SIZE);
+ if(st->codec->extradata == NULL)
+ return AVERROR(ENOMEM);
+ st->codec->extradata_size = track->codec_priv.size;
+ memcpy(st->codec->extradata,
+ track->codec_priv.data + extradata_offset,
+ track->codec_priv.size);
+ }
}
if (track->type == MATROSKA_TRACK_TYPE_VIDEO) {