Any errors it will just stop waiting for input. CHD.EXE must be in same directory and would start with a test file or two first. For the batch file just change the extension and path. Search the forum here for several examples since that is where I got mine (attached). There are variety of scripts to convert in mass. For the CHD format, the MAME monthly package has the CHD EXE. Phillips CDi (I use MAME here) and Panasonic 3DO (Retroarch 4DO core) also can use CHD formatĪll the compression can take time and some of the non-command line tools are "one by one" conversions which can suck a lot of time. There is a command line tool called GCIT that will compress from ISO or can use the compress option within Dolphin (full standalone emulator). Gamecube - can use the GCZ compression format with Dolphin standalone or Retroarch core. Also works with Demul standalone emulator.
Sega Dreamcast - can use CHD with reicast Retroarch core.
NEC Turbografx-CD - can use CHD with Mednefen PCE Retroarch core Note for the Sega 32X CD games I had to leave those in native bin/cue format since the Retroarch core for Sega 32X didn't accep CHDs (but was only a few games for me so didn't worry about it). Sega CD - can use CHD with Genesis Plus GX Retroarch core. Saturn - can use CHD with Retroarch Mednafen cores. Tool called PSP ISO Compressor works well (again, not easy for mass number of files). PSP - Use CSO compression format on most games. See below for batch conversion (and limitations) for PBP using PSX2PSP: In theory could compress all to PBP but the PSX2PSP tool isn't well suited to mass conversion and isn't quite as a efficient as CHD (typically over half size of original disc) You can also do that with M3U playlists for CHDs but the PBP format is much simpler. The advantage is it allows you to merge Disc 1, Disc 2 type multi-disc games into one compressed file (cannot do that in CHD, must retain each Disc # separately). For multi-discs I use the PBP format that was compression tool designed by Sony for the PSP.
Note that standalone emulator PSXe does not support CHD format. PS1 - use CHD format if using Retroarch Mednafen HW cores it supports CHDs. Here is a listing for the larger game files: There have been version changes to CHD over years (up to 5 now) which have improved the archiving and compression process so best to use current CHD.EXE if compressing files. It does save quite a bit of space plus it can be uncompressed back to original format/CUE/ISO etc if needed. I have slowly moved most of mine from iso/bin formats over to CHD. CHD format is typically supported on most of the Retroarch cores.
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