[sebmellen]

Are you sure you need a USB capture card? I'm using an EOS M50 and I followed along with this guide: https://www.crackedthecode.co/how-to-use-your-dslr-as-a-webc.... Works pretty well, all FOSS stuff and avoids needing a capture card.

[mnw21cam]

That's ... exactly what I just said. However, the transcoding burden would be a little too much for the Atom in my laptop, so I'd have to do it on my main computer instead.

Regarding the capture card. The aspect ratio mess-up is entirely its fault.