avctx->bits_per_coded_sample = av_get_bits_per_sample(avctx->codec->id);
avctx->block_align = avctx->channels * avctx->bits_per_coded_sample / 8;
- avctx->bit_rate = avctx->block_align * avctx->sample_rate * 8;
+ avctx->bit_rate = avctx->block_align * 8LL * avctx->sample_rate;
return 0;
}