Guide to V2 Patches
1. What are V2 patches?
Have you ever downloaded something huge (say, a bloated CoalGirls release), only to have an updated version be released the moment you finish? Well, instead of having to redownload the entire file or mix and match parts to get a 'perfect' version, you can simply use a 'V2 Patch' if one is provided. V2 patches use a neat little program called 'xdelta3' to differentiate between two files and fill in any gaps. V2 patches can be used on any operating system.
2. How do I use a V2 patch?
V2 patches consist of three parts, all of which are typically provided by the releasing group: a .bat file, an .xdelta file, and the xdelta3 executable itself. The patching method differs by operating system.
- Mac OS XSpoiler
For the sake of simplicity, I will format this guide as if I wish to patch Japanese FLAC audio into a fictional Angel Beats release. Let us further assume that I do not want this release's AAC audio or OP/ED/Signs/Titles subtitle tracks.
The hard way:
The easy way:
To distribute your patch, make sure you include the xdelta3 executable, the .xdelta file you made in step 5, and the .bat file you made in steps 6 & 7. I prefer to compress these files into a .rar archive so they don't get split up. You do not need to provide any intermediary files (the FLAC audio itself, in my example) with the patch. Finally, it is important to note that anybody who uses the V2 patch must place all of the requisite files in the directory containing their V1 file.