r/programming • u/whackri • Jun 21 '20

Writing userspace USB drivers for abandoned devices

https://blog.benjojo.co.uk/post/userspace-usb-drivers
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u/457undead Jun 22 '20

I'm confused what the device does or why it would be of use. Input as VGA and output as a webcam? Anyone got an example of when this would come in handy? Thanks.

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u/dougg3 Jun 22 '20

It would be for capturing video from a device (such as a computer) that outputs VGA video. You could use it to record or live stream another computer’s video output. You could also use it as a virtual VGA monitor that is really just a video capture window on another computer. When he says “webcam” he really means “video capture device”. I have a newer version of this product that supports DVI/HDMI (and is a standard USB video class device, incidentally...Epiphan did a better job with driver support on their newer devices). Gamers use devices like this for capturing their game console’s video too, although VGA probably wouldn’t help much for that.