sampletype will be corrupted
The output file will be corrupted when compressing. "sampletype" becomes invalid and cannot be loaded by MuseScore/fluidsynth.
Hey @KKQ-KKQ, as this repository appears to be pretty much dead, could you maybe enable issue reporting on your fork? Maybe it can eventually replace this repository. I did find an issue with large soundfonts (probably any soundfont > 2GB will fail to load, at least on Windows) but I don't see much of a point in reporting it right here if the fix will never land in this repository.
@sagamusix Thanks for reporting. Now it is fixed on my repo. It probably works though it needs a lot of memory. https://github.com/KKQ-KKQ/sf2convert