I have a VideoWriter that I'm using to save videos. I am using vid.set(cv2.VIDEOWRITER_PROP_QUALITY) to try to adjust the quality of the final movie (I have adjusted from 10 to 100). According to the docs it can be set between 0 and 100 "in some codecs." I have tried this for h264, divx, ffv1, and mjpg codecs. It seems to make no difference: the movies look the same and are the same size in memory. Are there any codecs for which I can actually change the bit rate for encoding my movies using VIDEOWRITER_PROP_QUALITY?