static int mxf_set_audio_pts(MXFContext *mxf, AVCodecContext *codec, AVPacket *pkt) { MXFTrack *track = mxf->fc->streams[pkt->stream_index]->priv_data; pkt->pts = track->sample_count; if (codec->channels <= 0 || av_get_bits_per_sample(codec->codec_id) <= 0) return AVERROR(EINVAL); track->sample_count += pkt->size / (codec->channels * av_get_bits_per_sample(codec->codec_id) / 8); return 0; }