So after a few months of test and for test who played Dreamcast a lot or tested a lot of different games, what is the preferred format :
Files that contain the.cdi file extension are most commonly associated with the DiscJuggler software application. DiscJuggler is a program that allows users to make copies of computer discs and data. The CDI files that are created by DiscJuggler contain disc images that have been created by using the software application. This small file allows a developer to load, read a TOC and process a.CDI image. This can allow any program to have the ability to use the.CDI file format. DISCLAIMER: The.CDI File Mounter is available for developers for any type of use, but at their own risk. CDI file is a Gear CD-ROM CD-i Image.GEAR is a CD/DVD recording and pre-mastering software package. Files that contain the.cdi file extension are most commonly associated with the DiscJuggler software application. DiscJuggler is a program that allows users to make copies of computer discs and data. The CDI files that are created by DiscJuggler contain disc images that have been created by using the software application.
Cdi File Format
- CDI seems to offer the best compatibility but it is a degraded / compressed format
- GDI is a full 1:1 format accuretly dumping the game but the compatibility with current emulator isn't very good
- CHD is compatible with the emulator but people doesn't mention it very much : when converting GDI to CDI is the compatibility as least as good as CDI ? also can you convert ISO (which aren't compatible with the emulator) to CHD ?