- st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
- st->codec->codec_tag = id;
- st->codec->codec_id = codec;
- st->codec->channels = 1;
- st->codec->sample_rate = rate;
+ st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
+ st->codecpar->codec_tag = id;
+ st->codecpar->codec_id = codec;
+ st->codecpar->channels = 1;
+ st->codecpar->channel_layout = AV_CH_LAYOUT_MONO;
+ st->codecpar->sample_rate = rate;