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Average of all video frames in a video
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| import cv2 | |
| import numpy as np | |
| import sys | |
| def eprint(*args, **kwargs): | |
| print(*args, file=sys.stderr, **kwargs) | |
| def main(): | |
| # Get the file name | |
| args = sys.argv [1:] | |
| # Get the capture argument, and the FPS and frame count from it | |
| try: | |
| outpath = args.pop() | |
| capture = cv2.VideoCapture(args.pop()) | |
| except IndexError: | |
| eprint("Usage: <video> <out-image>") | |
| exit(1) | |
| count = int(capture.get(cv2.CAP_PROP_FRAME_COUNT)) | |
| print(f"Frames: {count}") | |
| average_frame = None | |
| # Iterate over every frame | |
| for frame in range(count): | |
| print(f"\r{ (frame + 1) / count * 100: <.2f}%", end = "") | |
| # Read the captured frame | |
| (read, frame) = capture.read() | |
| if average_frame is None: | |
| average_frame = np.zeros_like(frame).astype(float) | |
| average_frame += frame.astype(float) / count | |
| print() | |
| if average_frame is None: | |
| eprint("No frames found in video") | |
| exit(2) | |
| # Save the image | |
| cv2.imwrite(outpath, average_frame) | |
| print("Done") | |
| exit(0) | |
| if __name__ == "__main__": | |
| main() |
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