Extract frames from a video at specified intervals using FFmpeg. Evaluation of the differences between consecutive frames and saving only those frames that exhibit significant changes. The difference is determined by calculating the mean absolute pixel difference. Frames with a difference exceeding a given threshold are stored as PNG images

extract_frames_no_duplicates.py

import cv2
import os

def extract_different_frames(video_path, output_dir, threshold=30):
    cap = cv2.VideoCapture(video_path)
    prev_frame = None
    frame_count = 0

    while True:
        ret, frame = cap.read()

        if not ret:
            break

        if prev_frame is not None:
            # Calculate absolute difference between the frames
            diff = cv2.absdiff(prev_frame, frame)
            mean_diff = diff.mean()

            # If the difference exceeds the threshold, save the frame
            if mean_diff > threshold:
                frame_count += 1
                frame_filename = os.path.join(output_dir, f'frame{frame_count:04d}.png')
                cv2.imwrite(frame_filename, frame)

        prev_frame = frame

    cap.release()

if __name__ == "__main__":
    video_path = "~/Desktop/video.mp4"
    output_dir = "frames"
    threshold = 30  # Adjust the threshold as needed

    if not os.path.exists(output_dir):
        os.makedirs(output_dir)

    extract_different_frames(video_path, output_dir, threshold)