par->codec_type = AVMEDIA_TYPE_AUDIO;
par->codec_id = s->iformat->raw_codec_id;
- par->bit_rate = par->sample_rate * par->channels * BLOCK_SIZE * 8LL / BLOCK_SAMPLES;
+ par->bit_rate = (int64_t)par->sample_rate * par->channels * BLOCK_SIZE * 8LL / BLOCK_SAMPLES;
avpriv_set_pts_info(st, 64, BLOCK_SAMPLES, par->sample_rate);