Ziggle Wump Media Compressor 0.2-beta.09.20.2024

#!/data/data/com.termux/files/usr/bin/bash

# ATTENTION:

# Copying and pasting the script can introduce formatting that is improper to bash.  If the script doesn't run, you may need to use the dos2unix command to fix it.

# ex.  dos2unix ziggle_wump.sh

# --------------------
#     Licence
# --------------------

# This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.

# This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.

# You should have received a copy of the GNU General Public License along with  this program. If not, see <https://www.gnu.org/licenses/>.

# -----------------
#     About
# -----------------

# This script is for Termux on Android and is not associated with the apps it uses.

# Copyright Joshua Hansen and contributors: Microsoft Co-Pilot, OpenAI ChatGPT and Google Gemini.

# Shout out to Webernets https://youtu.be/0aeCfDKLfbs?si=58y58eWSiXurcHpj who gave me the inspiration for this, the one who did the heavy lifting figuring out the command line options. And this video helping me figure out how to do it in Handbrake, but I needed it all in a one-line command line option and this was it, I had to write it myself.

# -----------------------
#   Instructions
# -----------------------

instructions="#Ziggle Wump: The Simple FFmpeg Command Line Companion Script for Termux on Android

# Disclaimer

 * This script does not allow conversion of encrypted files. Encrypted content typically indicates copyrighted material.

 * The script itself does not violate copyright, but the user's actions might. The script cannot prevent users from circumventing copyright protection, nor is it the script's responsibility to do so. The onus lies with the copyright holder to encrypt their media.

 * It is not recommended to use the script to violate copyright law. US copyright law allows for spaceshifting and fair use of copyrighted material.

# Note

 * Some phones, like the Galaxy S24, have battery-saving features that can impact the encoding process and result in partially encoded files. Ensure Termux is in focus (full screen or split-screen) while encoding, and keep the screen on during the process.

 * For more information and potential fixes for specific phones, visit https://dontkillmyapp.com/.

# Getting Started

 * Download or Copy: Download or copy this script to a file and rename it if desired (e.g., ziggle_wump.sh). Placing it in your Movies folder makes it easily accessible on both Android and Termux, although you can also put it in /usr/bin to use it system-wide.

 * Make it Executable: Run chmod +x ziggle_wump.sh to make the script executable.
 * Run the Script: Execute the script using bash ./ziggle_wump.sh [options].

# Options

 * -r resolution: Sets a custom resolution height while preserving aspect ratio (e.g., bash ziggle_wump.sh -r 720).
 * -d: Checks and upgrades dependencies.
 * -y: Automatically confirms prompts.
 * -o output_fps: Sets a custom output FPS (e.g., bash ziggle_wump.sh -o 60).
 * -b max_video_bitrate: Sets a custom maximum video bitrate in kilobits per second (e.g., bash ziggle_wump.sh -b 2000).
 * -a avg_audio_bitrate: Sets a custom average audio bitrate in kilobits per second (e.g., bash ziggle_wump.sh -a 128).
 * -i: Installs the script to /data/data/com.termux/files/usr/bin/zwmc.
 * -u: Uninstalls the script from /data/data/com.termux/files/usr/bin/zwmc.
 * -m: Shows the menu for setting options.
 * -h, --help: Displays help message."

# -----------------------------
#        Variables
# -----------------------------

# Supported File Types
video_ext="mp4 mkv avi mov flv wmv webm mts 3gp mpeg ogv rmvb m4v f4v vob ts m2ts asf swf m2v divx xvid mpg mpe m1v dvr-ms mxf gxf bink mng nsv"
audio_ext="mp3 aac wav flac ogg m4a wma ac3 eac3 opus amr aiff alac caf dts mka mp2 ra tta voc"

# Maximum resolution by height in pixels maintaining aspect ratio. Either the user defined value or the input video original value will be selected
resolution=600
max_video_bitrate=688 # In Kilobits per second.
# Set the audio bitrate for both videos and audio files.
avg_audio_bitrate=96 # In Kilobits per second.
output_fps=24 # Maximum output FPS. Original or user input, whichever is lower.

# Full Log file path
log_file="$HOME/storage/shared/Movies/VideoDrop/convert.log"

# Shortened log file path for terminal output
log_file_echo=$(echo "$log_file" | sed 's|/data/data/com.termux/files/home|.../home|g')

# Full directory paths
video_drop_dir="$HOME/storage/shared/Movies/VideoDrop"
video_processing_dir="$HOME/storage/shared/Movies/VideoProcessing"
output_dir_base="$HOME/storage/shared/Movies/VideoConverted"

# Shortened directory paths for terminal output
video_drop_dir_echo=$(echo "$video_drop_dir" | sed 's|/data/data/com.termux/files/home|.../home|g')
video_processing_dir_echo=$(echo "$video_processing_dir" | sed 's|/data/data/com.termux/files/home|.../home|g')
output_dir_base_echo=$(echo "$output_dir_base" | sed 's|/data/data/com.termux/files/home|.../home|g')

# combine audio and video extension variables to pass to find command.
filetypes=""
for ext in $audio_ext $video_ext; do
    filetypes="$filetypes -iname '*.$ext' -o"
done
# Remove the trailing ' -o'
filetypes="${filetypes% -o}"

# --------------------------------
#     Command Flags
# --------------------------------

show_menu() {
    auto_yes=true  # Turn on auto_yes when the menu is shown
    while true; do
        deps_status="Off"
        if [ "$check_deps" = true ]; then
            deps_status="On"
        fi

        menu_choice=$(dialog --menu "Choose an option:" 15 50 8 \
            1 "Set Resolution Height ($resolution)" \
            2 "Set Output FPS ($output_fps)" \
            3 "Set Max Video Bitrate ($max_video_bitrate)" \
            4 "Set Average Audio Bitrate ($avg_audio_bitrate)" \
            5 "Check Dependencies ($deps_status)" \
            6 "Install Script" \
            7 "Uninstall Script" \
            8 "Compress Files" 2>&1 >/dev/tty)

        case $menu_choice in
            1)
                new_resolution=$(dialog --inputbox "Enter resolution height ($resolution):" 8 40 "$resolution" 2>&1 >/dev/tty)
                if [ $? -eq 0 ]; then
                    resolution="$new_resolution"
                fi
                ;;
            2)
                new_output_fps=$(dialog --inputbox "Enter output FPS ($output_fps):" 8 40 "$output_fps" 2>&1 >/dev/tty)
                if [ $? -eq 0 ]; then
                    output_fps="$new_output_fps"
                fi
                ;;
            3)
                new_max_video_bitrate=$(dialog --inputbox "Enter max video bitrate ($max_video_bitrate):" 8 40 "$max_video_bitrate" 2>&1 >/dev/tty)
                if [ $? -eq 0 ]; then
                    max_video_bitrate="$new_max_video_bitrate"
                fi
                ;;
            4)
                new_avg_audio_bitrate=$(dialog --inputbox "Enter average audio bitrate ($avg_audio_bitrate):" 8 40 "$avg_audio_bitrate" 2>&1 >/dev/tty)
                if [ $? -eq 0 ]; then
                    avg_audio_bitrate="$new_avg_audio_bitrate"
                fi
                ;;
            5)
                if [ "$check_deps" = true ]; then
                    check_deps=false
                else
                    check_deps=true
                fi
                ;;
            6)
                clear
                install_script
                ;;
            7)
                clear
                uninstall_script
                ;;
            8)
                break
                ;;
            *)
                tput sgr0  # Reset terminal colors
                clear
                exit 0
                ;;
        esac
    done
}

# Function to display help message
show_help() {
    width=$(tput cols)
    script_name=$(basename "$0")
    echo "Place your media files in $video_drop_dir_echo." | tee -a "$log_file" | fmt -w $width
    echo "Usage: bash $script_name [-r resolution] [-d] [-y] [-h|--help] [-o output_fps] [-b max_video_bitrate] [-a avg_audio_bitrate] [-i] [-u] [-m]" | fmt -w $width
    echo "  -r resolution ex. bash $script_name -r 720               Custom resolution height preserving aspect ratio" | fmt -w $width
    echo "  -d Check and upgrade dependencies." | fmt -w $width
    echo "  -y Automatically say yes to prompts." | fmt -w $width
    echo "  -o output_fps Set custom output FPS. ex. bash $script_name -o 60" | fmt -w $width
    echo "  -b max_video_bitrate Set custom max video bitrate in kilobits per second. ex. bash $script_name -b 2000" | fmt -w $width
    echo " -a avg_audio_bitrate Set custom average audio bitrate in kilobits per second. ex. bash $script_name -a 128" | fmt -w $width
    echo "  -i Install the script to /data/data/com.termux/files/usr/bin/zwmc" | fmt -w $width
    echo "  -u Uninstall the script from /data/data/com.termux/files/usr/bin/zwmc" | fmt -w $width
    echo " -m: Shows the menu for setting options."
    echo "  -h, --help Display this help message" | fmt -w $width
    exit 0
}

# Install Ziggle Wump to /usr/bin folder and widget script to ~/.shortcuts
install_script() {
    if [ -f /data/data/com.termux/files/usr/bin/zwmc ]; then
        current_dir=$(dirname "$0")
        if [ "$current_dir" != "/data/data/com.termux/files/usr/bin" ]; then
            echo "Script is installed but not running from the bin directory. Reinstalling..."
            cp "$0" /data/data/com.termux/files/usr/bin/zwmc
            chmod +x /data/data/com.termux/files/usr/bin/zwmc
            if whereis zwmc | grep -q "/data/data/com.termux/files/usr/bin/zwmc"; then
                echo "Script reinstalled to /data/data/com.termux/files/usr/bin/zwmc"
            else
                echo "Reinstallation failed"
            fi
        else
            echo "Script is already installed and running from the bin directory."
        fi
    else
        cp "$0" /data/data/com.termux/files/usr/bin/zwmc
        chmod +x /data/data/com.termux/files/usr/bin/zwmc
        if whereis zwmc | grep -q "/data/data/com.termux/files/usr/bin/zwmc"; then
            echo "Script installed to /data/data/com.termux/files/usr/bin/zwmc"
        else
            echo "Installation failed"
        fi
    fi

    # Create the shortcut script
    mkdir -p $HOME/.shortcuts
    echo '#!/data/data/com.termux/files/usr/bin/bash' > $HOME/.shortcuts/Ziggle\ Wump\ Media\ Compressor.sh
    echo 'zwmc -m' >> $HOME/.shortcuts/Ziggle\ Wump\ Media\ Compressor.sh
    echo 'read -p "Press Enter to continue."' >> $HOME/.shortcuts/Ziggle\ Wump\ Media\ Compressor.sh
    echo 'case $return in' >> $HOME/.shortcuts/Ziggle\ Wump\ Media\ Compressor.sh
    echo '    * ) echo "Exiting script."' >> $HOME/.shortcuts/Ziggle\ Wump\ Media\ Compressor.sh
    echo 'esac' >> $HOME/.shortcuts/Ziggle\ Wump\ Media\ Compressor.sh
    chmod +x $HOME/.shortcuts/Ziggle\ Wump\ Media\ Compressor.sh

    exit 0
}

uninstall_script() {
    if [ ! -f /data/data/com.termux/files/usr/bin/zwmc ]; then
        echo "Script is not installed."
        exit 0
    else
        rm -f /data/data/com.termux/files/usr/bin/zwmc
        if ! whereis zwmc | grep -q "/data/data/com.termux/files/usr/bin/zwmc"; then
            echo "Script uninstalled from /data/data/com.termux/files/usr/bin/zwmc"
        else
            echo "Uninstallation failed"
        fi
    fi

    # Remove the shortcut script
    rm -f $HOME/.shortcuts/Ziggle\ Wump\ Media\ Compressor.sh

    exit 0
}

# Parse command-line options
check_deps=false
auto_yes=false  # Set auto_yes to false by default
while getopts "r:dyho:b:a:ium" opt; do
    case $opt in
        r) resolution="$OPTARG" ;;  # Set custom resolution by height
        d) check_deps=true ;;  # Check and upgrade dependencies
        y) auto_yes=true ;;  # Automatically say yes to prompts
        o) output_fps="$OPTARG" ;;  # Set custom output FPS
        b) max_video_bitrate="$OPTARG" ;;  # Set custom max video bitrate
        a) avg_audio_bitrate="$OPTARG" ;;  # Set custom average audio bitrate
        i) install_script ;;  # Install the script
        u) uninstall_script ;;  # Uninstall the script
        m) auto_yes=true; show_menu ;;  # Show menu and turn on auto_yes
        h) show_help ;;  # Display help
        *) show_help ;;  # Display help for invalid options
    esac
done

shift $((OPTIND -1))

# ---------------------------------
#       Dependencies
# ---------------------------------

if $check_deps; then
    echo "Checking and upgrading dependencies, please wait..."
    pkg update && pkg upgrade -y
    if ! command -v bc &> /dev/null; then
        pkg install bc -y
    fi
    if ! command -v ffmpeg &> /dev/null; then
        pkg install ffmpeg -y
    fi
    if ! command -v ncurses-utils &> /dev/null; then
        pkg install ncurses-utils -y
    fi
    echo "Update complete."
fi

# -----------------------------------------------------
#     Create Directories and log file
# -----------------------------------------------------

# Create necessary directories if they don't exist
mkdir -p "$video_drop_dir" "$video_processing_dir" "$output_dir_base"

# Change to the VideoDrop directory
cd "$video_drop_dir" || { echo "Directory change failed"; exit 1; }

# Check if log file exists
if [ -f "$log_file" ]; then
    echo "Old log file found.  Deleting..."
    rm "$log_file"
    echo "File deleted."
else
    echo "Log File does not exist.  The script will create $log_file_echo"
fi

# ------------------------
#     Start script
# ------------------------

width=$(tput cols)

echo "Running... Press Ctrl+C to stop."

echo ""
echo "$instructions" | tee -a "$log_file" | fmt -w $width

echo ""
# Function to prompt the user to continue or quit
prompt_continue_or_quit() {
    while true; do
        # Recursively find and process videos and audio
        video_count=$(eval "find \"$video_drop_dir\" -type f \( $filetypes \) | wc -l")
        echo "Detected $video_count compatible video and/or audio file(s) in:" | tee -a "$log_file" | fmt -w $width

        if [ "$video_count"  -eq 0 ]; then
            echo "$video_drop_dir_echo folder created. Place your videos and audio here including files in folders using your favorite file manager for Android, and then run  the script again.

Supported File Types:

Video: $video_ext
Audio: $audio_ext" | tee -a "$log_file" | fmt -w $width
            exit 0
        fi

        # Prompt text
        prompt_text="$video_drop_dir_echo. You can start encoding now. Do you wish to proceed? (Y/N): "

        # Format the prompt text
        formatted_prompt=$(echo "$prompt_text" | fmt -w $width)

        if $auto_yes; then
            echo "$formatted_prompt"
            echo "Y"
            return 0  # Automatically continue
        else
            # Read user input with formatted prompt
            read -p "$formatted_prompt" yn
            case $yn in
                [Yy]* ) return 0;;  # Continue
                [Nn]* ) echo "Exiting script."; exit 0;;  # Quit
                * ) echo "Please answer Y or N.";;
            esac
        fi
    done
}

# Function to clean up file names
clean_file_names() {
    eval "find \"$video_drop_dir\" -type f \( $filetypes \)" | while read -r file; do
        dir=$(dirname "$file")
        base=$(basename "$file")
        new_base=$(echo "$base" | sed 's/[^a-zA-Z0-9 ._-]//g' | tr -s ' ')
        new_file="$dir/$new_base"
        if [ "$file" != "$new_file" ]; then
            mv "$file" "$new_file"
        fi
    done
}

# Clean up file names before processing
clean_file_names

# Prompt the user to continue or quit?
prompt_continue_or_quit

echo "Starting conversion process..." | tee -a "$log_file"

# Initialize ffmpeg_custom_options
ffmpeg_custom_options="-c:v libx265 -x265-params \"deblock=-1:no-sao=1:keyint=250:aq-mode=3:psy-r=0.75:psy-rdoq=2.0:rd=4:rdoq-level=1:rect=0:strong-intra-smoothing=0\" -crf 32 -preset slow -c:a libopus -vbr on -ac 2 -af \"loudnorm=I=-23:LRA=7:TP=-2\""

# Add avg audio bitrate if avg_audio_bitrate is set
if [ -n "$avg_audio_bitrate" ]; then
    ffmpeg_custom_options="$ffmpeg_custom_options -b:a ${avg_audio_bitrate}k"
fi

# Add maxrate and bufsize options if max_video_bitrate is set
if [ -n "$max_video_bitrate" ]; then
    ffmpeg_custom_options="$ffmpeg_custom_options -maxrate ${max_video_bitrate}k -bufsize 60M"
fi


# -----------------------------
#    Audio Encoder
# -----------------------------

width=$(tput cols)

# Function to check the log file for "Killed" message
check_for_killed_message() {
    if grep -q " Killed     " "$log_file"; then
        echo "$(date '+%Y-%m-%d %H:%M:%S') Error: Process was killed. Check log file for details." | tee -a "$log_file"
        return 1
    fi
    return 0
}

# Function to process audio files
process_audio() {
    local audio="$1"
    local audio_echo=$(echo "$audio" | sed 's|/data/data/com.termux/files/home|/home|g')
    local relative_path="${audio#$video_drop_dir/}"
    local dir_path=$(dirname "$relative_path")
    local base_name=$(basename "$relative_path" | tr -cd '[:alnum:]._ -')
    local output_dir="$output_dir_base/$dir_path"
    local output_file="$output_dir/${base_name}_converted.opus"
    local temp_output_file="$output_file.tmp"

    mkdir -p "$output_dir"  # Create output directory

    echo "$(date '+%Y-%m-%d %H:%M:%S') Processing $audio to $output_file" | tee -a "$log_file"

    # Construct the FFmpeg command for audio processing
    local ffmpeg_command="ffmpeg -nostdin -loglevel error -stats -stats_period 1 -y -i \"$audio\" -c:a libopus -b:a ${avg_audio_bitrate}k -vbr on -ac 2 -af \"loudnorm=I=-23:LRA=7:TP=-2\" -f opus \"$temp_output_file\""

    echo "$ffmpeg_command" | tee -a "$log_file"

    # Execute the FFmpeg command
    eval $ffmpeg_command 2>&1 | tee -a "$log_file"

    # Check for "Killed" message in the log file
    if ! check_for_killed_message; then
        echo "$(date '+%Y-%m-%d %H:%M:%S') Error: Process was killed. Exiting." | tee -a "$log_file"
        exit 1
    fi

    if [ $? -eq 0 ]; then
        mv "$temp_output_file" "$output_file"  # Rename the temporary file to the final output file
        mkdir -p "$video_processing_dir/$dir_path"  # Create processing directory
        mv "$audio" "$video_processing_dir/$relative_path"
        echo ""
        echo "$(date '+%Y-%m-%d %H:%M:%S') Converted $audio_echo. Your original files will be in the $video_processing_dir_echo folder for comparison. Your new files are in $output_dir_base_echo" | tee -a "$log_file" | fmt -w $width
    else
        echo ""
        echo "$(date '+%Y-%m-%d %H:%M:%S') Error processing \"$audio\". Check log file for details." | tee -a "$log_file"
        exit 1
    fi
}

# ------------------------------
#      Video Encoder
# ------------------------------

width=$(tput cols)

# Function to check the log file for "Killed" message
check_for_killed_message() {
    if grep -q " Killed     " "$log_file"; then
        echo "$(date '+%Y-%m-%d %H:%M:%S') Error: Process was killed. Check log file for details." | tee -a "$log_file" | fmt -w $width
        exit 1
    fi
}

process_video() {
    local video="$1"
    local video_echo=$(echo "$video" | sed 's|/data/data/com.termux/files/home|.../home|g')
    local relative_path="${video#$video_drop_dir/}"
    local dir_path=$(dirname "$relative_path")
    local base_name=$(basename "$relative_path" | tr -cd '[:alnum:]._ -')
    local output_dir="$output_dir_base/$dir_path"
    local output_file="$output_dir/${base_name}_converted.mkv"
    local scale_filter=""

    # Get input video resolution
    input_resolution=$(ffprobe -v error -select_streams v:0 -show_entries stream=height -of csv=p=0 "$video" | tr -d '[:space:],')

    if [ -n "$resolution" ]; then
        if [ "$input_resolution" -gt "$resolution" ]; then
            scale_filter="scale=-2:$resolution:flags=lanczos"
            echo "Input resolution ($input_resolution) is higher than user-defined resolution ($resolution). Using user-defined resolution." | tee -a "$log_file"
        else
            echo "Input resolution ($input_resolution) is lower or equal to user-defined resolution ($resolution). Keeping original resolution." | tee -a "$log_file"
        fi
    else
        echo "Resolution set to: original" | tee -a "$log_file"
    fi

    mkdir -p "$output_dir"  # Create output directory

    echo "$(date '+%Y-%m-%d %H:%M:%S') Processing $video to $output_file" | tee -a "$log_file"

    # Get the frame rate of the input video
    input_fps=$(ffprobe -v error -select_streams v:0 -show_entries stream=avg_frame_rate,r_frame_rate -of csv=p=0 "$video" | awk -F'/' '{if ($2) print $1/$2; else print $1}' | bc -l)

    # Define common frame rates
    common_fps=(23.976 24 25 29.97 30 50 59.94 60)

    # Function to find the nearest valid frame rate
    nearest_fps() {
        local fps=$1
        local nearest=${common_fps[0]}
        local min_diff=$(echo "scale=5; $fps - ${common_fps[0]}" | bc | awk '{print ($1 >= 0) ? $1 : -$1}')
        for rate in "${common_fps[@]}"; do
            local diff=$(echo "scale=5; $fps - $rate" | bc | awk '{print ($1 >= 0) ? $1 : -$1}')
            if (( $(echo "$diff < $min_diff" | bc -l) )); then
                min_diff=$diff
                nearest=$rate
            fi
        done
        echo $nearest
    }

    # Round the frame rate to the nearest valid frame rate
    rounded_fps=$(nearest_fps $input_fps)

    # Determine the lower frame rate
    if (( $(echo "$rounded_fps > $output_fps" | bc -l) )); then
        final_fps=$output_fps
    else
        final_fps=$rounded_fps
    fi

# Set the initial video filter option
video_filter_option="yadif=2,fps=$final_fps,${scale_filter}"

# Detect the pixel format using ffprobe
input_file="$video"
pix_fmt=$(ffprobe -v repeat+level+error -select_streams v:0 -show_entries stream=pix_fmt -of default=noprint_wrappers=1:nokey=1 "$input_file" | awk 'NR==1{print $1}')

echo "Pixel format: $pix_fmt"

# Validate the pixel format
valid_pix_fmt=$(ffmpeg -pix_fmts | grep -w "$pix_fmt")

# Check if 10-bit encoding is selected
if [[ "$pix_fmt" == *"10le"* || "$pix_fmt" == *"10be"* ]]; then
    video_filter_option="$video_filter_option,deband=1thr=0.01:2thr=0.01:3thr=0.01:4thr=0.01:range=4:direction=-3.14:blur=1:coupling=0"
fi

# Define a variable for probe size and analyze duration
probe_analyze_opts="-probesize 2147483647 -analyzeduration 2147483647"

# Detect subtitle codecs and convert unsupported ones
subtitle_codecs=$(ffprobe -v error $probe_analyze_opts -select_streams s -show_entries stream=codec_name -of csv=p=0 "$input_file")
subtitle_map=""
if [ -n "$subtitle_codecs" ]; then
    subtitle_map="-map 0:s"  # Include all subtitle streams
    i=0
    while read -r codec; do
        case "$codec" in
            # Text-based subtitles to be copied directly
            srt)
                subtitle_map="$subtitle_map -c:s:$i copy"
                ;;
            # Other text-based subtitles to be converted to SRT
            ass|ssa|webvtt|eia_608|eia_708|scc|sami|ttml|smi|teletext|mov_text|microdvd|subviewer)
                subtitle_map="$subtitle_map -c:s:$i srt"
                ;;
            # Bitmap-based subtitles to be converted to DVD subtitles
            dvdsub|pgs|vobsub|hdmv_pgs_subtitle|dvd_subtitle)
                subtitle_map="$subtitle_map -c:s:$i dvdsub"
                ;;
            # Copy other compatible subtitles
            *)
                subtitle_map="$subtitle_map -c:s:$i copy"
                ;;
        esac
        i=$((i + 1))
    done <<< "$subtitle_codecs"
else
    echo "No subtitle streams detected." | tee -a "$log_file"
fi

# Combine common and custom FFmpeg options
combined_ffmpeg_options="-nostdin -loglevel error -stats -stats_period 5 $probe_analyze_opts -y -fix_sub_duration -i \"$video\" -map 0:v:0 -map 0:a:? -map_chapters 0 $ffmpeg_custom_options"

# Construct the FFmpeg command
local ffmpeg_command
if [ -n "$valid_pix_fmt" ]; then
    if [ -n "$subtitle_map" ]; then
        ffmpeg_command="ffmpeg $combined_ffmpeg_options -vf \"$video_filter_option\" -pix_fmt $pix_fmt $subtitle_map"
    else
        ffmpeg_command="ffmpeg $combined_ffmpeg_options -vf \"$video_filter_option\" -pix_fmt $pix_fmt"
    fi
else
    if [ -n "$subtitle_map" ]; then
        ffmpeg_command="ffmpeg $combined_ffmpeg_options -vf \"$video_filter_option\" $subtitle_map"
    else
        ffmpeg_command="ffmpeg $combined_ffmpeg_options -vf \"$video_filter_option\""
    fi
fi

# Ensure all subtitle streams are marked as "default: off"
subtitle_streams=$(ffprobe -v error $probe_analyze_opts -select_streams s -show_entries stream=index -of csv=p=0 "$input_file")
if [ -n "$subtitle_streams" ]; then
    for stream_index in $subtitle_streams; do
        ffmpeg_command="$ffmpeg_command -disposition:s:$stream_index 0"
    done
fi

# Add the output file name at the end
ffmpeg_command="$ffmpeg_command \"$output_file\""

echo "FFmpeg command: $ffmpeg_command" | tee -a "$log_file"

# Execute the FFmpeg command
if ! eval $ffmpeg_command 2>&1 | tee -a "$log_file"; then
    echo "FFmpeg command failed. Check the log for details." | tee -a "$log_file"
    exit 1
fi

    # Check for "Killed" message in the log file
    check_for_killed_message

   if [ $? -eq 0 ]; then
        mkdir -p "$video_processing_dir/$dir_path"  # Create processing directory
        mv "$video" "$video_processing_dir/$relative_path"
        echo ""
        echo "$(date '+%Y-%m-%d %H:%M:%S') Complete.  Your original files are in $video_processing_dir_echo.  Your new files are in $output_dir_base_echo" | tee -a "$log_file" | fmt -w $width
    else
        echo ""
        echo "$(date '+%Y-%m-%d %H:%M:%S') Error processing \"$video\". Check log file for details." | tee -a "$log_file"
        exit 1
    fi
}

# --------------------------------------
#    Start Batch Encoding
# --------------------------------------

width=$(tput cols)

stop_processing=false

# Function to handle SIGINT (Ctrl+C)
handle_sigint() {
    echo ""
    echo "Caught SIGINT (Ctrl+C). Exiting immediately." | fmt -w $width
    stop_processing=true
    exit 1  # Exit immediately without performing cleanup
}

# Trap SIGINT and call the handle_sigint function
trap handle_sigint SIGINT

# Process each file found
eval "find \"$video_drop_dir\" -type f \( $filetypes \)" | while read -r file; do
    if [ "$stop_processing" = true ]; then
        echo "Stopping processing due to SIGINT."
        exit 1
    fi

    case "$file" in
        *.mp3|*.aac|*.wav|*.flac|*.ogg|*.m4a|*.wma|*.ac3|*.eac3|*.opus|*.amr|*.aiff|*.alac|*.caf|*.dts|*.mka|*.mp2|*.ra|*.tta|*.voc)
            process_audio "$file" || exit 1
            ;;

        *.mp4|*.mkv|*.avi|*.mov|*.flv|*.wmv|*.webm|*.mts|*.3gp|*.mpeg|*.ogv|*.rmvb|*.m4v|*.f4v|*.vob|*.ts|*.m2ts|*.asf|*.swf|*.m2v|*.divx|*.xvid|*.mpg|*.mpe|*.m1v|*.dvr-ms|*.mxf|*.gxf|*.bink|*.mng|*.nsv)
            process_video "$file" || exit 1
            ;;
    esac
done

# -----------------------------
#     Finishing Up
# -----------------------------

width=$(tput cols)

find "$PWD" -type d -empty -delete
echo "removed empty folders in $video_drop_dir_echo directory"

# final output message
echo ""
echo "Log file is in $video_drop_dir_echo.  There may be unprocessed media files or other incompatible files.  Some files may need to be remuxed for compatibility." | tee -a "$log_file" | fmt -w $width
exit 0