Canonical way to use mplex with lpcm sound seems to involve sox https://marc.info/?l=mjpeg-users&m=112004582102258&w=2 ==== 1. sox NAME.wav -t raw -x -s -w -c2 -r48000 NAME.lpcm 2. mplex -S 0 -f 8 -V -o NAME.mpg NAME.lpcm NAME.m2v === I also found at mjpeg-users list this utility that makes wavs into lpcm http://dvd-audio.sourceforge.net/wav2lpcm.tar.gz only 48/96 khz, 16/24bits stereo wavs are supported Also, this little table suggest there IS dynamic range bit in lpcm header https://dvd.sourceforge.net/dvdinfo/lpcm.html dynamic_range X 3 X High 3 bits of byte. dynamic_range Y 5 Y Lower 5 bits of byte linear gain = 2^(4-(X+(Y/30))) in dB gain = 24.082 - 6.0206 X - 0.2007 Y Also, according to this post 24-bit lpcm worked around mjpegtools-1.8.0 release: https://marc.info/?l=mjpeg-users&m=112912922124144&w=2 all this quite theoretical at this point, not tried it yet.