optimize.sh

#!/bin/bash

# Configuration
OUTPUT_DIR="optimized_videos"
FORMATS=("mp4" "webm")
MAX_WIDTH=1280
AUDIO_BITRATE="128k"
VIDEO_BITRATE="2M"
CRF=23  # Constant Rate Factor (18-28, lower = better quality)

# Create output directory
mkdir -p "$OUTPUT_DIR"

optimize_video() {
    local input_file="$1"
    local filename=$(basename "$input_file")
    local name="${filename%.*}"

    echo "Processing: $filename"

    # MP4 (H.264) version
    ffmpeg -i "$input_file" \
        -c:v libx264 \
        -preset slow \
        -crf $CRF \
        -c:a aac \
        -b:a $AUDIO_BITRATE \
        -maxrate $VIDEO_BITRATE \
        -bufsize $VIDEO_BITRATE \
        -vf "scale=min($MAX_WIDTH\,iw):-2" \
        -movflags +faststart \
        "$OUTPUT_DIR/${name}_optimized.mp4"

    # WebM version
    ffmpeg -i "$input_file" \
        -c:v libvpx-vp9 \
        -crf $CRF \
        -b:v 0 \
        -c:a libopus \
        -b:a $AUDIO_BITRATE \
        -vf "scale=min($MAX_WIDTH\,iw):-2" \
        "$OUTPUT_DIR/${name}_optimized.webm"
}

# Usage instructions
show_help() {
    echo "Video Optimizer for Web"
    echo "Usage: $0 [options] <input_files...>"
    echo ""
    echo "Options:"
    echo "  -h, --help        Show this help message"
    echo "  -w, --width       Set maximum width (default: $MAX_WIDTH)"
    echo "  -q, --quality     Set quality (18-28, lower is better, default: $CRF)"
    echo "  -b, --bitrate     Set video bitrate (default: $VIDEO_BITRATE)"
    echo "  -a, --audio       Set audio bitrate (default: $AUDIO_BITRATE)"
    echo ""
    echo "Example: $0 -w 720 -q 20 video1.mp4 video2.mov"
}

# Parse command line arguments
while [[ $# -gt 0 ]]; do
    case $1 in
        -h|--help)
            show_help
            exit 0
            ;;
        -w|--width)
            MAX_WIDTH="$2"
            shift 2
            ;;
        -q|--quality)
            CRF="$2"
            shift 2
            ;;
        -b|--bitrate)
            VIDEO_BITRATE="$2"
            shift 2
            ;;
        -a|--audio)
            AUDIO_BITRATE="$2"
            shift 2
            ;;
        *)
            if [ -f "$1" ]; then
                optimize_video "$1"
            else
                echo "Error: File not found - $1"
            fi
            shift
            ;;
    esac
done

# Check if no input files were provided
if [ $# -eq 0 ]; then
    show_help
    exit 1
fi