Yeah! Talked with Aorin some minutes ago and I was able to get it working (the regular mednafen core); seems my bios were no good for that specific core but worked ok with the rearmed one.
Sorry for the topic derailing.
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It’s all good, I think it’s important for anyone reading to know rearmed doesn’t have CHD.
Guys do you know if there is a way/bat or command to convert from img to chd? I have some Sega CD games in img/cue/ccd/sub format.
I think you will want to convert them to bin/cue first. Easiest way to do that:
- Mount in Daemon Tools
- Rip the ‘disc’ to a bin/cue using IMGBurn
- Then convert the bin/cue to CHD
If your file fails to rip in IMGBurn it’s a bad file, you’ll want to track down a different copy. At least, from my experience that’s what I’ve found while converting hundreds and hundreds of games.
Personally, even when not using CHD compression, I convert ALL CD-ROM based games to bin/cue. I find them to be very easy to work with as far as file management, and they are pretty universally accepted.
That makes sense. I made the amateur mistake of trying to mount the img file with the embedded Windows option (right-click on file > Mount) but it gave me an error, so I assumed that this type of img files cannot be mounted like CDs.
I’ll try with Daemon once I get home.
Thank you 
Me again… Sorry XD
I am trying to add to my game list the Marvel vs Capcom 2 and Capcom vs SNK 2 games from Dreamcast (as they are currently unplayable through MAME).
Do you guys know if there is a way to convert from CDI to CHD? (They currently weight 800MB aprox. each).
I don’t know how you’d convert CDI dumps to CHD, but you should use Redump GDIs instead, since they are clean, unmodified dumps. CDI dumps often lossy compress or sometimes remove music and/or FMVs. And GDIs are easy to convert to CHD since you can just point chdman to the GDI file like you would a CUE.
I second that, never use a CDI unless you don’t have any other option. The CDI format was used to squeeze the 1GB size Dreamcast games onto 700MB CD-Rs (or 99min CD-Rs in a few cases)
Always go for GDI then convert it to CHD on Dreamcast
Again, thank you: I did not know anything about the cdi vs gdi formats. Will do.
Using Hyperspin with Reicast on a Shield TV…I’m trying to get my Dreamcast gdi files to chd files. Easy enough, but I’m on a Mac. I’ve tried gditochd through Windows Parallels and it won’t work because of the virtual path names that Parallels assigns and it can’t find the paths for the files it needs, no matter where I place them. Anyone know of a work around? I looked all over for a similar program for the Mac , but couldn’t find one. I even tried using an external HDD to house the files while converting, but Parallels still has issues with gditochd and the paths…Frustrating having all these gdi files and no way to convert them. I would leave them as is, but Reicast is very picky about gdi vs. chd files and performance on the Shield TV…
Hey swurver. Try using the following in Parallels:
Extract the chdman folder and place the gdi files in there as well. If you open the bat with a text editor you will see that it does not work with paths, but only with what it has in the same folder. I haven’t tested it in Parallels, but you might give it a try and see if it works.
Placed the 2 files inside of the rom folder containing the gdi & track files…ran the batch file…and got this error (see screenshot). I then moved the folder containing everything to the C: path under local disk through Parallels, ran the batch file and it friggin’ worked!!! Now, do I have to run the batch file in each rom folder or is there an even simpler way to mass convert a number of rom folders? I’m spoiled now…lol. Thanks for this…helped me out tremendously!!! 
Glad it worked
You can place the GDI folders in the chdman folder. It should work.
I need to compress PS2 and Nintendo Wii games. What format do you recommend me?
PS2=CSO Wii=WBFS
Hope it helps
It helps but what program do you recommend for converting ISO to WBFS? I want to use WBFS files with Dolphin emulator and RetroArch. ISO to WBFS app has 3 options I’m curious what they do. How do I know if I need to “copy all partitions from ISO” or “copy only game partition from ISO” and what does “copy 1:1 from ISO” mean?
Well you should only copy the game partition really. If there are unneeded files for the games, they won’t increase your final compressed iso, you can do this blindly, your compressed games won’t be affected.
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You recommend WBFS? I thought that was a lossy format? I use GCZ compressed via Dolphin personally.
GCZ is also lossy for Wii games. GCZ is only lossless for Gamecube.
The only compression for Wii that is lossless is NASOS/nNASOS (iso.dec), but unfortunately it is not yet supported by Dolphin.
Whoa what? Are you serious? So I might have screwed my Wii collection? I can’t figure how it’s not lossy for GC but is for Wii.