Selim

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V4L webcam upside down hack (Linux)

Saturday, 25-Jun-2016 07:17:41 CEST

I own a laptop where the webcam's image (using Linux UVC webcam driver) is upside down. After a lot of googling I found a way to fix this. You have to preload the v4l2convert.so library that reacts to an obscure environment variable:

$ env LIBV4LCONTROL_FLAGS=2 LD_PRELOAD=/path/to/v4l2convert.so <your program here>