When using 640x480 @ 120 FPS and the processing can't keep up with
the frame rate, some glitches start showing in the images; these commit
adds some additional options that were used during test and might be
useful in the future.
I'm not entirely sure where these glitches come from, but it seems they originate
After tracing it back to this point, increasing
LIBUVC_NUM_TRANSFER_BUFS seems to get rid of the bug.
However, setting it too high impedes opening all three pupil cameras.
Temporary solution is to make sure processing can keep up with the
framerate (e.g., by downsizing the processing input in EyeRecToo).