If you can push raw frames (in YUV or RGB format) to the Wx::MediaControl, then you can use ffmpeg to read from the webcam and convert and output the raw frames to STDOUT. You set up a filehandle to read from there and push the frames into the Wx frame. I have something not unlike this (except that my build of ffmpeg.exe does not want to read from the video camera and that I use OpenGL to render the output) in App::VideoMixer.