Small script for video crop.

croppy.sh

#!/bin/bash
# Small script for video crop. It takes a file as an argument.
# File format: source_name start_time end_time destination_name
# Example: GOPR0766.MP4 16:50 17:10 example

folder_name="croppy_result"	

array_contains() {
    local e
    for e in "${@:2}"; do
        [[ "$e" == "$1" ]] && return 0;
    done
    return 1
}

seconds_from_time() {
    minutes=$(cut -d ":" -f 1 <<< "$1")
    seconds=$(cut -d ":" -f 2 <<< "$1")
    result=$((10#$minutes * 60 + 10#$seconds))
    echo $result
}

# Check if directory contains all files listed in passed config
missing_files=()
while read Fn St Et Rn; do
    if [ ! -r $Fn ]; then
        missing_files+=($Fn)
    fi 
done < $1

if [ -n "$missing_files" ]; then
    echo "Can't find files: "${missing_files[@]}""
    exit 1
fi

# Check if all passed times less then video duration
out_of_bounds=0

while read Fn St Et Rn; do
    duration_seconds=$(ffprobe -v quiet -show_entries format=duration -of default=noprint_wrappers=1:nokey=1 $Fn | cut -d '.' -f 1)
    start_time_seconds=$(seconds_from_time $St)
    end_time_seconds=$(seconds_from_time $Et)
    if [ $start_time_seconds -gt $duration_seconds ] || [ $end_time_seconds -gt $duration_seconds ]; then
        echo "Out of bounds: $Fn"
        out_of_bounds=1
    fi
done < $1

if [ $out_of_bounds -gt 0 ]; then
    exit 1
fi

# Create result directory
mkdir ./$folder_name

# Crop
filenames=()

while read Fn St Et Rn; do
    filename=$Rn
    # Add suffix for duplicate files
    if array_contains "$filename" "${filenames[@]}"; then
        i=2 
        while array_contains "$filename$i" "${filenames[@]}"; do
          let i++ 
        done
        filename="$filename$i"
    fi  
    filenames+=($filename)

    ffmpeg -i $Fn -ss $St -to $Et -vcodec libx264 ./$folder_name/$filename.mp4 < /dev/null
done < $1