Deletes repeating frames ifexist more than 2 times. Then it can be merged as a video file.

DropRepeatingFramesInVideo.sh

#!/bin/bash

# BEFORE THE SCRIPT RUN
# mkdir frame
# ffmpeg -i video.mp4 -r 30 frame/$filename%04d.jpg
# cd frame

# AFTER THE SCRIPT RUN
# ffmpeg -framerate 30 -pattern_type glob -i '*.jpg' -c:v libx264 -pix_fmt yuv420p ../out.mp4



# Create an associative array to store checksums and corresponding file names
declare -A checksums

# Create an associative array to store the count of each checksum
declare -A counts

# Iterate over all JPEG files in the current directory
for file in *.jpg; do
    # Get the MD5 checksum of the current file
    checksum=$(md5 -q "$file")

    # Increment the count for this checksum
    ((counts[$checksum]++))

    # Check if the checksum already exists in the array
    if [[ ${checksums[$checksum]} ]]; then
        # If the count is 3 or more, remove the file
        if (( ${counts[$checksum]} >= 3 )); then
            echo "Deleting duplicate image: $file"
            rm "$file"
        else
            echo "Duplicate image found (count: ${counts[$checksum]}): $file"
        fi
    else
        # Store the checksum and filename in the array
        checksums[$checksum]=$file
        echo "Checksum for $file: $checksum"
    fi
done