This application uses GLUT and OpenGL to create a window with a canvas and draw the image into that canvas. But the image is obtained from a capture device. The image can be processed before display and a sequence of captured images can be saved in an AVI file during capture.
You can view the source code here: glut_capture.c
This application uses IUP and OpenGL to create a window with two canvases and draw a video capture image into one canvas. A processed image can be displayed in the second canvas. It can also process frames from a video file.
You can download the source code and some compiler projects here: iupglcap.zip