They'd promised a webcam driver, but that never materialized and instead just gave instructions on using OBS to use the video stream window as a camera.
https://www.epilogue.co/product/gb-operator
https://www.epilogue.co/support/playing-games/gb-camera-webc...
I really need to dig that out, from memory the software only worked with Win98 or ME - but I guess there must be a way of getting it running elsewhere (or getting my ME laptop running).
Some parallel thinking here, but it feels like it should be possible to build a software only version of this running entirely on a smartphone.
Take a picture of the GameBoy screen, and the app reconstructs the source image. It's only 128x128 2-bit depth pixels after all - the information content there seems well within the bounds of what can be reconstructed from a modern high resolution smartphone camera sensor.
Would be a cool computer vision project.
https://bennvenn.myshopify.com/products/usb-gb-c-cart-dumper...
https://help.imgur.com/hc/en-us/articles/41592665292443-Imgu...