How to write/pipe to a virtual webcam created by V4L2loopback module?

c++ linux opencv v4l2 v4l2loopback
user477519 picture user477519 · Jun 17, 2012 · Viewed 7.6k times · Source

I have written an application which reads from a webcam and processes the frames using OpenCV on linux. Now I want to pipe the output of my application to a virtual webcam that has been created by the V4L2loopback module so other applications are able to read it. I have written the application using C. I am not sure how to approach doing this. Could you please give me any hints?

Answer

user477519 picture user477519 · Jun 26, 2012

I have found an answer in the old V4L2loopback module's page on Google code.

http://code.google.com/p/v4l2loopback/source/browse/test.c

newer link: https://github.com/umlaeute/v4l2loopback/blob/master/examples/test.c

This has helped me so far just to write to the device.

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