I don’t know if anyone talked about this somewhere else in the forum but the El gato HD60Pro seems to be more compatible with OSSC than what it looks.
Elgato has release a directshow driver, it cames up with the lastest updates for this capture card.
Thanks to this driver it’s now possible to capture more resolutions from the OSSC (but you have to drop the elgato software for something else, like amarec or obs or both)
I’ve been using a cheap upscaler SCART+HDMI to HDMI between my OSSC and my HD60Pro to be able to record anything but it was messing up the aspect ratios and colors.
So I did some record on various consoles, note that I’m not an expert in video encoding.
Megadrive 2 NTSC-J https://youtu.be/oEUbk5h6itw
Dreamcast NTSC-J https://youtu.be/yzJf7ViXWos
PS2 Slim PAL https://youtu.be/pz4Q-EQ8OHc