* fall back on using AVCodecContext.frame_size, which is not as reliable
* for indicating packet duration. */
frame_size = av_get_audio_frame_duration(enc, enc->block_align);
- if (!frame_size)
- frame_size = enc->frame_size;
waveformatextensible = (enc->channels > 2 && enc->channel_layout) ||
enc->sample_rate > 48000 ||
enc->bits_per_coded_sample, bps);
}
- if (enc->codec_id == AV_CODEC_ID_MP2 ||
- enc->codec_id == AV_CODEC_ID_MP3) {
- /* This is wrong, but it seems many demuxers do not work if this
- * is set correctly. */
+ if (enc->codec_id == AV_CODEC_ID_MP2) {
blkalign = frame_size;
- // blkalign = 144 * enc->bit_rate/enc->sample_rate;
+ } else if (enc->codec_id == AV_CODEC_ID_MP3) {
+ blkalign = 576 * (enc->sample_rate <= (24000 + 32000)/2 ? 1 : 2);
} else if (enc->codec_id == AV_CODEC_ID_AC3) {
blkalign = 3840; /* maximum bytes per frame */
} else if (enc->codec_id == AV_CODEC_ID_AAC) {