@edmaul69 Thank you for the idea. mitu did explain this with a little more depth in the other linked thread.

@greenhawk84

That's a very nice trick. Until now, I was under the impression that AdvanceMAME was the only arcade emulator where the BIOS files and clones could reside away from a main ROM grouping. Thanks for sharing this.

@battlecat One way to do this would be to do the following:

Scrape all of your roms to make sure all are listed in the gamelist.xml file. Manually edit the gamelist.xml file (usually located in ~/.emulationstation/gamelists/<system>) to remove the unwanted roms. From the main emulationstation screen, push start, then find the option in the menu that says "Parse gamelist.xml file only" or something like that. Reboot your system, then enjoy!

This is how I hide the various bios files as well. Of note, if you add a new system or rom, you'll have to disable the "Parse gamelist.xml" option to see the new roms, unless you've scraped them already.

Good luck!

@SlowSL You can try creating a .bat (batch) file using the following command, and then editing it with notepad and replacing all instaces of .zip with .mp4 or any other extension.

for /f "usebackq delims=|" %f in (`dir /b "c:\MY_1000_HANDPICKED_ROMS"`) do echo copy "c:\NEW_FULL_NONMERGED_SET\%f" "c:\NEW_1000_NONMERGED_ROMS" >> C:\EXAMPLE.BAT

That's a bit hokey, but I'm not as familiar with DOS scripting. If you were doing something in the linux environment, you can use string substitution in bash fairly easily. For example;

cd /home/pi/RetroPie/roms/mame-libretro for f in *.zip; do cp /path/to/mp4s/"${f%.*}".mp4 /somewhere/else; done

In the above, the .zip would be stripped from the file name, and it would be replaced with .mp4

@thiagofm thanks - I think this should be included in RetroPie!!