How much compression you actually achieve will depend on the binary data in the file and on the algorithm you use. You can use any lossless compression algorithm to compress the file (e.g., add the ISO to a ZIP file, etc.).

If you've got the original disk though you can always re-rip it if you absolutely need the original.Īs far as doing all this as a batch instead of one-by-one. The data inside the ISO image is structured based on the file system that was used on the optical disc from which it was created. However, it's theoretically possible to unscrub a scrubbed game - tools exist to unscrub Wii ISOs, one just needs to be written for GameCube ISOs. THEN compress trimmed ISO in Dolphin (resulting. I found this post on the Dolphin Forums, where someone was doing this to save a alot of space with 4x4 EVO 2: Trim the ISO with GameCube ISO Tool. There have been some 'guides' and posts that I found searching but I couldn't find anything specific. Yes, you heard it right a 900mb file to a mere 3mb file, but do remember that this totally depends on the type of file. I would like to compress GameCube ISOs in batch. The only caveat of scrubbing is that you won't be able to restore the exact untrimmed file, which is only a concern for archival purposes (the MD5 sum of the trimmed ISO won't match the original file and also won't match databases such as Redump). Answer (1 of 2): OK, so I use this technique usually and it helped me reduce a 900mb ISO file to a 3mb.

Trimming an ISO changes the underlying data structure of the game, which can break compatibility, plus it makes no difference if you're going to be compressing them anyway. Scrubbing an ISO only removes garbage data and leaves the rest of the ISO intact, which preserves compatibility with both Dolphin and the original GameCube / Wii hardware (should you choose to, say, boot your games from a USB hard drive on a softmodded Wii). This is what I've done with my entire GameCube library. I recommend scrubbing your ISOs (instead of trimming them) with GCIT before compressing them into a GCZ with Dolphin.

How to compress iso