restart camera in macosx

I use a USB camera on my work laptop and the camera sometimes doesn't show up in my video conferencing app. I verified that the camera is showing in the usb list with lsusb (a script I got from https://github.com/jlhonora/lsusb which is great btw).

dtruss showed that the VDCAssistant was being accessed by my apps, so I tried killing that and boom the camera shows up.

So now I aliased camkill='sudo pkill VDCAssistant'

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