Mastering OpenCV 4 with Python

Using the properties – playing a video backwards

To see how we can use the aforementioned properties, we are going to understand the read_video_file_backwards.py script, which uses some of these properties to load a video and output it backwards, showing the last frame of the video first and so on. We are going to use the following properties:

• cv2.CAP_PROP_FRAME_COUNT: This property provides the total number of frames
• cv2.CAP_PROP_POS_FRAMES: This property provides the current frame

The first step is to get the index of the last frame:

# We get the index of the last frame of the video fileframe_index = capture.get(cv2.CAP_PROP_FRAME_COUNT) - 1

Therefore, we set the current frame to read to this position:

 # We set the current frame position ...