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I have a webcam which supports YUYV (raw) and MJPEG (compressed) formats. When I capture video stream - cap = cv2.VideoCapture(0), openCV takes YUYV as default.

I want to use MJPEG (MJPG). I found here that it is possible. I try to set it by command: cap.set(7, ('M', 'J', 'P', 'G')), but it doesn't work. How can I choose which video format I want to get in OpenCV?

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Please try below line.

cap.set(8, ('M', 'J', 'P', 'G'))
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Just in case somebody comes over this: 8 is the numeric representation for cv.CAP_PROP_FORMAT like 7 is the one for cv.CAP_PROP_FRAME_COUNT These are defined in VideoCaptureProperties (as of now reachable via docs.opencv.org/4.x/d4/d15/…)

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