there is this issue with a wide range of usb webcams, that you cannot turn off settings like autofocus, autoexposure etc. in osx.
i found a very nice unix-command work that deals with that, offering full control for cams: uvc-controller:
however, if max (jit.qt.grab) connects to the camera, the communication for uvc-controller with the cam is blocked.
my first guess was, that this is a quicktime issue, but when i test it with QuickTime Player all works fine. meaning i can turn off autoexposure eg. of my cam (a logitech c910) when having QuickTime Player receiving the video-stream.
so my question to jitter experts is, if there is an explanation for this behaviour and maybe any sort of workaround.