I've seen a few files that are compressed only half or 1/3 of its original size before being un-compressed(ex. 150MB -> 500MB). Does anyone know how that was done?
I tried WinRAR & 7Zip with the highest level of compression but none of them were even close to that. I'm trying to compress a bunch of .rmvb video files(around 250MB per file), after using 7 Zip with the highest settings it only saved me 50MB of space(quite useless).