ffmpeg split video to segments script

ffmpeg_split_video.sh

# Use:
# split_video INPUT_FILE OUTPUT_FILE_PREFIX HH:MM:SS HH:MM:SS ...
#
# Description:
# Splits video segements between provided timestamps, 
# omitting start (00:00:00 to first timestamp) and end (last timestamps to end of video)

split_video() {
    input_file="$1"
    output_file_name="$2"
    shift
    shift

    # Convert timestamps array to seconds and store both formats
    declare -a times_hms=("$@")
    declare -a times_seconds

    for t in "${times_hms[@]}"; do
        seconds=$(echo "$t" | awk -F: '{ print ($1 * 3600) + ($2 * 60) + $3 }')
        times_seconds+=($seconds)
    done

    # Process segments between timestamps (skip first and last segments)
    for ((i=0; i<${#times_seconds[@]}; i++)); do
        start_time="${times_hms[i]}"
        end_time="${times_hms[i+1]}"

        # Calculate duration
        duration=$(echo "${times_seconds[i+1]} - ${times_seconds[i]}" | bc)

        # Generate output filename using timestamps
        output_file="$output_file_name ${start_time}-${end_time}.mp4"
        # Replace colons with underscores for filename
        output_file=$(echo "$output_file" | tr ':' '_')

        echo "Creating segment from $start_time to $end_time"
        ffmpeg -ss "$start_time" -i "$input_file" -t "$duration" -c copy -reset_timestamps 1 "$output_file"
    done
}