st->codec->bits_per_coded_sample = imgfmt.bmiHeader.biBitCount;
st->codec->bit_rate = (uint64_t)stream->info.dwSampleSize * (uint64_t)stream->info.dwRate * 8 / (uint64_t)stream->info.dwScale;
st->codec->codec_tag = imgfmt.bmiHeader.biCompression;
st->codec->bits_per_coded_sample = imgfmt.bmiHeader.biBitCount;
st->codec->bit_rate = (uint64_t)stream->info.dwSampleSize * (uint64_t)stream->info.dwRate * 8 / (uint64_t)stream->info.dwScale;
st->codec->codec_tag = imgfmt.bmiHeader.biCompression;