usage: reduce the length of videos buy ignoring repeated frames
syntax: chunk <path> -p <similarity percentage> -o <output path>
example: chunk /home/user/Downloads/video.mp4 -p 90 -o /home/user/Downloads/output.mp4
flags:
    -p, --percentage: similarity percentage to ignore repeated frames (default: 90)
    -o, --output: output path (default: same directory as input file)
    -h, --help: display help
example: chunk /home/user/Downloads/video.mp4 -p 80 -o /home/user/Downloads/output.mp4


algorithm:
    1. read video file
    2. extract frames
    3. calculate similarity between frames
    4. if frame similarity is greater than the given percentage, ignore the second frame
    5. write the remaining frames to a new video file