Add All existing

split_mkv_by_chapter

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+#!/bin/bash
+
+# Function to convert timestamp to seconds, including milliseconds
+timestamp_to_seconds() {
+    IFS=':' read -r hours minutes seconds <<< "$1"
+    IFS='.' read -r seconds milliseconds <<< "$seconds"
+    total_seconds=$(bc <<< "$hours * 3600 + $minutes * 60 + $seconds")
+    total_milliseconds=$(bc <<< "$milliseconds / 1000")
+    echo "$total_seconds + $total_milliseconds" | bc
+}
+
+# Function to convert seconds back to HH:MM:SS.mmm format for mkvmerge
+seconds_to_hms() {
+    total_seconds="$1"
+    # Separate whole seconds and milliseconds
+    seconds=$(echo "$total_seconds" | cut -d'.' -f1)
+    milliseconds=$(echo "$total_seconds" | cut -d'.' -f2 | sed 's/^[0-9]\{1,3\}$/&000/')  # Add trailing zeros if necessary
+    
+    # Ensure milliseconds have 3 digits
+    milliseconds=$(echo "$milliseconds" | cut -c1-3)
+
+    # Convert seconds to HH:MM:SS format
+    hours=$(bc <<< "$seconds / 3600")
+    minutes=$(bc <<< "($seconds % 3600) / 60")
+    seconds=$(bc <<< "$seconds % 60")
+
+    # Print in HH:MM:SS.mmm format
+    printf "%02d:%02d:%02d.%03d" "$hours" "$minutes" "$seconds" "$milliseconds"
+}
+
+# Function to split the video using mkvmerge
+split_video() {
+    input_file="$1"
+    start_time="$2"
+    end_time="$3"
+    output_file="$4"
+    
+    start_hms=$(seconds_to_hms "$start_time")
+    end_hms=$(seconds_to_hms "$end_time")
+    
+    # Print the mkvmerge command before running it
+    echo "Running command: mkvmerge -o \"$output_file\" --split parts:\"$start_hms\"-\"$end_hms\" \"$input_file\""
+
+    # Execute the command
+    mkvmerge -o "$output_file" --split parts:"$start_hms"-"$end_hms" "$input_file"
+}
+
+# Function to get video duration
+get_duration() {
+    input_file="$1"
+    duration=$(ffprobe -v quiet -print_format json -show_format "$input_file" | jq -r '.format.duration')
+    echo "$duration"
+}
+
+# Function to extract chapter start and end times from the input file
+get_chapters() {
+    input_file="$1"
+    chapters=()
+    
+    # Extract the chapters using mkvinfo, then parse the start and end times
+    while IFS= read -r line; do
+        if [[ "$line" =~ "start" ]]; then
+            start_time=$(echo "$line" | awk '{print $2}')
+            chapters+=("$start_time")
+        fi
+    done < <(mkvinfo "$input_file" | grep "Chapter")
+
+    echo "${chapters[@]}"
+}
+
+# Main function
+main() {
+    only_between=false
+    
+    if [ "$1" == "--only_between" ]; then
+        only_between=true
+        shift
+    fi
+    
+    if [ "$#" -lt 3 ]; then
+        echo "Usage: $0 [--only_between] <input_file> <timestamp1> <timestamp2> ..."
+        exit 1
+    fi
+
+    input_file="$1"
+    shift
+    timestamps=($@)
+    output_folder="split_output"
+    mkdir -p "$output_folder"
+
+    echo "Splitting video from provided timestamps..."
+    
+    # Handle chapter timecodes if present
+    if [[ "${timestamps[0]}" == "chapters" ]]; then
+        # Extract chapter start times
+        chapter_times=($(get_chapters "$input_file"))
+        
+        echo "Extracting chapters from the input file..."
+        
+        for ((i = 0; i < ${#chapter_times[@]} - 1; i++)); do
+            start_time="${chapter_times[$i]}"
+            end_time="${chapter_times[$i+1]}"
+            output_filename="$output_folder/chapter_$((i+1)).mkv"
+            echo "Splitting from Chapter $((i+1)) time $start_time to Chapter $((i+2)) time $end_time..."
+            split_video "$input_file" "$start_time" "$end_time" "$output_filename"
+        done
+    elif $only_between; then
+        echo "Extracting only specified segments..."
+        for ((i = 0; i < ${#timestamps[@]} - 1; i++)); do
+            start_time=$(timestamp_to_seconds "${timestamps[$i]}")
+            end_time=$(timestamp_to_seconds "${timestamps[$i+1]}")
+            output_filename="$output_folder/part_$((i+1)).mkv"
+            echo "Splitting from ${timestamps[$i]} to ${timestamps[$i+1]}..."
+            split_video "$input_file" "$start_time" "$end_time" "$output_filename"
+        done
+    else
+        echo "Extracting all segments..."
+        start_time=0
+        output_index=1
+        for timestamp in "${timestamps[@]}"; do
+            end_time=$(timestamp_to_seconds "$timestamp")
+            output_filename="$output_folder/part_${output_index}.mkv"
+            echo "Splitting from $start_time to $timestamp..."
+            split_video "$input_file" "$start_time" "$end_time" "$output_filename"
+            start_time=$end_time
+            ((output_index++))
+        done
+        duration=$(get_duration "$input_file")
+        output_filename="$output_folder/part_${output_index}.mkv"
+        echo "Splitting from $start_time to $duration..."
+        split_video "$input_file" "$start_time" "$duration" "$output_filename"
+    fi
+
+    echo "Splitting complete. Files saved in $output_folder."
+}
+
+main "$@"