st->codecpar->sample_rate = sample_rate;
st->codecpar->bits_per_coded_sample = 32;
- st->codecpar->bit_rate = st->codecpar->sample_rate *
+ st->codecpar->bit_rate = (int64_t)st->codecpar->sample_rate *
st->codecpar->bits_per_coded_sample *
st->codecpar->channels;
st->codecpar->block_align = st->codecpar->bits_per_coded_sample *