Save grayscale video in OpenCV?

Question

I am trying to save a video as .avi format but i keep getting the error \"could not demultiplex stream\". I primarily want to save grayscale videos

Answer 1

It is possible that .DIVX is looking for a 3-channel BGR image to write, but you're only providing it a single channel image, since you're trying to write a grayscale image

Try doing this:

frame = cv2.cvtColor(frame, cv2.COLOR_GRAY2BGR)

essentially this will try to convert your greyscale image to BGR image. While your pixel values will remain gray, this will change frame to a 3-channel image