So I'm ripping all of my PS2 games and I noticed that the Sonic Mega Collection Plus is a whole 4.7GB, filling the entire DVD. Given that it's a collection of Genesis games, what could be taking up all that space?
A few dozen megabytes for the games and the launcher
About 1GB in video files
3GB in a file called _DUMMY_.BIN which contains nothing but NUL bytes
@fluffy This is why the Dolphin emulator devs implemented a unique lossless compressed disc format to crunch junk data especially well. An extreme but real example (and the only game I ever worked on that saw store shelves... and it shouldn't have). How often does a file compress to under 0.3% of original size?
Interestingly, Windows' built-in file compression brings this particular ISO down to about 0.6%. RVZ outperforms greatly on games with non-contiguous junk.
@fluffy Oops, used WIA instead of ISO. Still, uncompressed disc image either way.