While the weather is stewing here and there’s no desire to do anything, I suppose this is a good occasion to talk about two formats with the same extension that I’m not going to support.
The first TWV format comes from Reality Pump games like Knightshift and World War III: Black Gold. It is not a particularly complex codec but the fact that it’s simplified version of interlaced MPEG-2 or MPEG-4 with an additional layer of headerless deflate compression makes me not want to work on it at all.
The other TWV format comes from Québec and I’ve encountered it in Le Logiciel de Finances Personnel and (mostly with TMV extension) in the game Music Chase. I’ve written about it some time ago, essentially it is QuickTime MOV format with the annoying quirks like all values being little-endian, some additional fields inserted (I suspect that 1-byte version field and 3-byte flags field combination got expanded into two 4-byte fields), and it also uses custom handlers for both audio and video tracks (yes, even pure audio files contain a video track with dummy 17-byte frames). I tried to read the binary specification for the video decompressor but quickly got lost in code for Windows 3.x that Ghidra refused to decompile. The same applies to their special BMP compression (in TBP files).
Hopefully somebody else can fare better but I don’t expect to see these formats supported even in librempeg.
Well, if I wanted to add support for it I would hire good LLM coding model and it would both RE and write new decoder out in couple sessions. But I have 0 sponsors so that is out of way for now.
Nobody sponsors my work either (not even me). At least since I’m more interested in learning how it works and not in having a decoder for every imaginable format, not working on stuff is fine too.