videoGrabberExample

Learning Objectives

This openFrameworks example is designed to demonstrate how to access the webcam.

Studying this example will help you understand:

• how to print a list of available webcam devices (ofVideoDevice)
• how to initiate ofVideoGrabber
• how to allocate memory on your graphics card for an ofTexture or for ofPixels
• how to iterate through a webcam frame's pixels (by accessing its ofPixels)
• how to manipulate the webcam image / how to invert an image

Expected Behavior

If your computer has a webcam, you should be able to see the webcam image when launching this app on the left and an inverted version of the webcam stream on the right.

Classes used in this example

This example uses the following classes:

• ofVideoGrabber
• ofPixels
• ofTexture