@Mosu,
what does mkvtoolnix do with WAV files that are bigger than 2GB (or 4GB)? Does it support them? You know, the WAV header is limited to 2GB/4GB. Could you please:
(1) Either ignore the size information in the header, if the WAV file is bigger than 2GB/4GB?
(2) Or add support for wav64 or rf64 files?
In any case there should be some "official" way to feed mkvtoolnix with a >4GB WAV/PCM file.
Thanks!
Edit: Just noticed that mkvtoolnix does in fact support >4GB WAV files. So all is fine!