enc->frame_size = fifo_bytes / (2 * enc->channels);
av_fifo_generic_read(ost->fifo, samples, fifo_bytes, NULL);
ret = avcodec_encode_audio(enc, bit_buffer, bit_buffer_size, samples);
+ pkt.duration = av_rescale((int64_t)enc->frame_size*ost->st->time_base.den,
+ ost->st->time_base.num, enc->sample_rate);
enc->frame_size = fs_tmp;
}
if(ret <= 0) {