[人工智能]Opencv保存的视频无法播放

  cap = cv.VideoCapture(videoFile)
    print(cap.get(cv.CAP_PROP_FRAME_WIDTH))
    print(cap.get(cv.CAP_PROP_FRAME_HEIGHT))
    # 重新定义视频大小，并将其保存到指定路径中
    fourcc = cv.VideoWriter_fourcc(*'XVID')
    videoFile = os.path.join("..\\demoDatasets\\videos4", "test.avi")
    out = cv.VideoWriter(videoFile, fourcc, 20, (640, 368))
    assert out.isOpened(), "重塑后的视频读取失败"
    while out.isOpened():
        ret, frame = cap.read()
        if ret:
             out.write(frame)
             cv.imshow('frame',frame)
             if cv.waitKey(2) == ord('q'):
                 break
        else:
            break
    out.release()

原因，out.wirte设置的画布大小必须和待写入的帧的大小保持一致