png2mp4() {
    local max_images=""
    local step_multiplier=""
    local repeat=1
    local temp_dir="/home/kade/.local/tmp"

    while [[ "$#" -gt 0 ]]; do
        case $1 in
            --max) max_images="$2"; shift ;;
            --step) step_multiplier="$2"; shift ;;
            --repeat) repeat="$2"; shift ;;
            *) echo "Unknown parameter passed: $1"; return 1 ;;
        esac
        shift
    done

    echo "Creating temporary directory..."
    mkdir -p "$temp_dir"

    echo "Checking for PNG files..."
    png_files=($(/usr/bin/env ls *.png 2>/dev/null))
    if [ ${#png_files[@]} -eq 0 ]; then
        echo "Error: No PNG files found in the current directory."
        return 1
    fi

    # Find all unique sample numbers
    local samples=($(ls *.png | sed -n 's/.*_\([0-9][0-9]\)_.*/\1/p' | sort -u))

    for sample in "${samples[@]}"; do
        local output_filename="$(basename "$(pwd)")_sample${sample}.mp4"
        echo "Processing sample ${sample}. Output filename: $output_filename"

        echo "Creating repeated images for sample ${sample}..."
        for img in *_${sample}_*.png; do
            for i in $(seq 1 $repeat); do
                cp "$img" "$temp_dir/${img%.*}_${i}.png"
            done
        done

        echo "Running ffmpeg for sample ${sample}..."
        local vf_options="scale=1024x1024"
        if [[ -n "$step_multiplier" ]]; then
            vf_options+=",drawtext=fontfile=/usr/share/fonts/TTF/Inconsolata-Light.ttf:text='Steps\: %{expr\:trunc(n*$step_multiplier/$repeat/1000000)}':x=10:y=h-th-10:fontsize=24:fontcolor=white"
        fi
        
        if [[ -n "$max_images" ]]; then
            vf_options="select='not(mod(n\,$max_images))',$vf_options"
        fi

        ffmpeg -framerate 60 -pattern_type glob -i "$temp_dir/*_${sample}_*.png" -vf "$vf_options" -crf 18 \
        -c:v libx264 -b:v 12M -pix_fmt yuv420p -y "$temp_dir/temp_${sample}.mp4"

        if [ $? -ne 0 ]; then
            echo "Error: ffmpeg command failed for sample ${sample}."
            rm -rf "$temp_dir"
            return 1
        fi

        echo "Processing final video for sample ${sample}..."
        duration=$(ffmpeg -i "$temp_dir/temp_${sample}.mp4" 2>&1 | grep 'Duration' | awk '{print $2}' | tr -d , | awk -F: '{print ($1 * 3600) + ($2 * 60) + $3}')
        fade_start=$(echo "$duration + 3" | bc)
        ffmpeg -i "$temp_dir/temp_${sample}.mp4" -vf "tpad=stop_mode=clone:stop_duration=8,fade=t=out:st=$fade_start:d=5" -c:v libx264 -b:v 12M -crf 18 -pix_fmt yuv420p -y "$output_filename"

        if [ $? -ne 0 ]; then
            echo "Error: Final ffmpeg processing failed for sample ${sample}."
            rm -rf "$temp_dir"
            return 1
        fi

        # Clean up temporary files for this sample
        rm "$temp_dir"/*_${sample}_*.png "$temp_dir/temp_${sample}.mp4"
    done

    echo "Cleaning up temporary directory..."
    rm -rf "$temp_dir"

    echo "All samples processed successfully."
}