batch-grayscale-conversion-inplace

name	batch_grayscale_conversion_inplace
description	Converts all extracted keyframe images in a directory from RGB to grayscale and overwrites the original files.

Use python3 and OpenCV to process the images. This reduces the complexity for subsequent template matching tasks.

import cv2
import glob
import os

def convert_to_grayscale(path_pattern="/root/keyframes_*.png"):
    image_files = sorted(glob.glob(path_pattern))
    for image_path in image_files:
        img = cv2.imread(image_path)
        if img is not None:
            gray_img = cv2.cvtColor(img, cv2.COLOR_BGR2GRAY)
            cv2.imwrite(image_path, gray_img)

if __name__ == "__main__":
    convert_to_grayscale()