wav to flac

wav-to-flac.sh

@@ -0,0 +1,303 @@
+#!/bin/bash
+
+# Media Library WAV to FLAC Transcoding Script
+# Processes multiple albums in a media library, converting all WAV files to FLAC
+
+# Check if ffmpeg is installed
+if ! command -v ffmpeg &> /dev/null; then
+    echo "Error: ffmpeg is not installed or not in PATH"
+    exit 1
+fi
+
+# Function to display usage
+show_usage() {
+    echo "Usage: $0 [OPTIONS] <media_library_path>"
+    echo ""
+    echo "Options:"
+    echo "  -o, --output DIR     Output directory (default: creates _flac suffix)"
+    echo "  -r, --replace        Replace original files (use with caution)"
+    echo "  -p, --preserve       Preserve original files alongside new ones"
+    echo "  -c, --compression N  FLAC compression level 0-8 (default: 8)"
+    echo "  -t, --test           Test mode - show what would be processed"
+    echo "  -h, --help           Show this help message"
+    echo ""
+    echo "Examples:"
+    echo "  $0 /path/to/music/library"
+    echo "  $0 -o /path/to/output /path/to/music/library"
+    echo "  $0 --test /path/to/music/library"
+    echo "  $0 --replace /path/to/music/library"
+    echo "  $0 -c 5 /path/to/music/library"
+}
+
+# Default options
+OUTPUT_DIR=""
+REPLACE_MODE=false
+PRESERVE_MODE=false
+TEST_MODE=false
+COMPRESSION_LEVEL=8
+PROCESSED_COUNT=0
+SKIPPED_COUNT=0
+ERROR_COUNT=0
+
+# Parse command line arguments
+while [[ $# -gt 0 ]]; do
+    case $1 in
+        -o|--output)
+            OUTPUT_DIR="$2"
+            shift 2
+            ;;
+        -r|--replace)
+            REPLACE_MODE=true
+            shift
+            ;;
+        -p|--preserve)
+            PRESERVE_MODE=true
+            shift
+            ;;
+        -c|--compression)
+            COMPRESSION_LEVEL="$2"
+            if [[ ! "$COMPRESSION_LEVEL" =~ ^[0-8]$ ]]; then
+                echo "Error: Compression level must be 0-8"
+                exit 1
+            fi
+            shift 2
+            ;;
+        -t|--test)
+            TEST_MODE=true
+            shift
+            ;;
+        -h|--help)
+            show_usage
+            exit 0
+            ;;
+        -*)
+            echo "Unknown option: $1"
+            show_usage
+            exit 1
+            ;;
+        *)
+            MEDIA_LIBRARY="$1"
+            shift
+            ;;
+    esac
+done
+
+# Check if media library path is provided
+if [ -z "$MEDIA_LIBRARY" ]; then
+    echo "Error: Media library path is required"
+    show_usage
+    exit 1
+fi
+
+# Check if media library exists
+if [ ! -d "$MEDIA_LIBRARY" ]; then
+    echo "Error: Media library directory '$MEDIA_LIBRARY' not found"
+    exit 1
+fi
+
+# Set output directory if not specified
+if [ -z "$OUTPUT_DIR" ] && [ "$REPLACE_MODE" = false ]; then
+    OUTPUT_DIR="${MEDIA_LIBRARY}_flac"
+fi
+
+# Function to check if file needs transcoding
+needs_transcoding() {
+    local file="$1"
+    
+    # Check if file is readable
+    if [ ! -r "$file" ]; then
+        echo "    WARNING: File not readable: $file"
+        return 1
+    fi
+    
+    # Get file format info
+    local format_info=$(ffprobe -v quiet -select_streams a:0 -show_entries stream=codec_name -of csv=p=0 "$file" 2>/dev/null)
+    
+    if [ -z "$format_info" ]; then
+        echo "    WARNING: Could not determine format for: $(basename "$file")"
+        return 1  # Skip files we can't analyze
+    else
+        echo "    Current format: $format_info"
+        return 0  # Needs transcoding
+    fi
+}
+
+# Function to process a single WAV file
+process_wav_file() {
+    local input_file="$1"
+    local relative_path="$2"
+    local output_file=""
+    
+    # Determine output file path
+    if [ "$REPLACE_MODE" = true ]; then
+        local dir=$(dirname "$input_file")
+        local filename=$(basename "$input_file" .wav)
+        output_file="$dir/${filename}.flac"
+    elif [ "$PRESERVE_MODE" = true ]; then
+        local dir=$(dirname "$input_file")
+        local filename=$(basename "$input_file" .wav)
+        output_file="$dir/${filename}.flac"
+    else
+        local output_relative_path="${relative_path%.wav}.flac"
+        output_file="$OUTPUT_DIR/$output_relative_path"
+    fi
+    
+    # Check if transcoding is needed
+    if ! needs_transcoding "$input_file"; then
+        echo "  SKIP: $relative_path (cannot analyze)"
+        ((SKIPPED_COUNT++))
+        return
+    fi
+    
+    # Check if output file already exists and is the same as input (prevent overwriting)
+    if [ "$output_file" = "$input_file" ]; then
+        echo "  SKIP: $relative_path (output would overwrite input)"
+        ((SKIPPED_COUNT++))
+        return
+    fi
+    
+    # Check if output file already exists
+    if [ -f "$output_file" ] && [ "$REPLACE_MODE" = false ]; then
+        echo "  SKIP: $relative_path (output file already exists)"
+        ((SKIPPED_COUNT++))
+        return
+    fi
+    
+    if [ "$TEST_MODE" = true ]; then
+        echo "  WOULD PROCESS: $relative_path → $(basename "$output_file")"
+        return
+    fi
+    
+    # Create output directory if needed
+    local output_dir=$(dirname "$output_file")
+    if [ ! -d "$output_dir" ]; then
+        echo "    Creating directory: $output_dir"
+        if ! mkdir -p "$output_dir"; then
+            echo "  ✗ ERROR: Cannot create output directory: $output_dir"
+            ((ERROR_COUNT++))
+            return
+        fi
+    fi
+    
+    # Verify input file exists and is readable
+    if [ ! -f "$input_file" ]; then
+        echo "  ✗ ERROR: Input file not found: $input_file"
+        ((ERROR_COUNT++))
+        return
+    fi
+    
+    if [ ! -r "$input_file" ]; then
+        echo "  ✗ ERROR: Input file not readable: $input_file"
+        ((ERROR_COUNT++))
+        return
+    fi
+    
+    # Create temporary file for safe processing
+    local temp_file="${output_file}.tmp.flac"
+    
+    echo "  PROCESSING: $relative_path"
+    
+    # Transcode the file
+    echo "    Command: ffmpeg -i \"$input_file\" -c:a flac -compression_level $COMPRESSION_LEVEL -y \"$temp_file\""
+    
+    if ffmpeg -i "$input_file" -c:a flac -compression_level "$COMPRESSION_LEVEL" -y "$temp_file" 2>"${temp_file}.log"; then
+        # Move temp file to final location
+        mv "$temp_file" "$output_file"
+        echo "  ✓ DONE: $(basename "$output_file")"
+        rm -f "${temp_file}.log"
+        
+        # Remove original file if in replace mode
+        if [ "$REPLACE_MODE" = true ]; then
+            echo "    Removing original: $(basename "$input_file")"
+            rm "$input_file"
+        fi
+        
+        ((PROCESSED_COUNT++))
+    else
+        echo "  ✗ ERROR: Failed to process $relative_path"
+        echo "    Error log saved to: ${temp_file}.log"
+        if [ -f "${temp_file}.log" ]; then
+            echo "    Last few lines of error:"
+            tail -n 5 "${temp_file}.log" | sed 's/^/    /'
+        fi
+        rm -f "$temp_file"
+        ((ERROR_COUNT++))
+    fi
+}
+
+# Function to process an album directory
+process_album() {
+    local album_dir="$1"
+    local album_name=$(basename "$album_dir")
+    
+    echo "Processing album: $album_name"
+    
+    # Find all WAV files in the album directory
+    local wav_files=()
+    while IFS= read -r -d '' file; do
+        wav_files+=("$file")
+    done < <(find "$album_dir" -name "*.wav" -type f -print0)
+    
+    if [ ${#wav_files[@]} -eq 0 ]; then
+        echo "  No WAV files found in $album_name"
+        return
+    fi
+    
+    # Process each WAV file
+    for wav_file in "${wav_files[@]}"; do
+        local relative_path="${wav_file#$MEDIA_LIBRARY/}"
+        process_wav_file "$wav_file" "$relative_path"
+    done
+    
+    echo ""
+}
+
+# Main processing
+echo "Media Library WAV to FLAC Transcoder"
+echo "===================================="
+echo "Input:  $MEDIA_LIBRARY"
+
+if [ "$TEST_MODE" = true ]; then
+    echo "Mode:   TEST MODE (no files will be modified)"
+elif [ "$REPLACE_MODE" = true ]; then
+    echo "Mode:   REPLACE (original WAV files will be deleted after conversion)"
+elif [ "$PRESERVE_MODE" = true ]; then
+    echo "Mode:   PRESERVE (FLAC files created alongside originals)"
+else
+    echo "Output: $OUTPUT_DIR"
+fi
+
+echo "FLAC Compression Level: $COMPRESSION_LEVEL"
+echo ""
+
+# Find all directories that contain WAV files (potential albums)
+album_dirs=()
+while IFS= read -r -d '' dir; do
+    if find "$dir" -maxdepth 1 -name "*.wav" -type f | grep -q .; then
+        album_dirs+=("$dir")
+    fi
+done < <(find "$MEDIA_LIBRARY" -type d -print0)
+
+if [ ${#album_dirs[@]} -eq 0 ]; then
+    echo "No albums with WAV files found in $MEDIA_LIBRARY"
+    exit 0
+fi
+
+echo "Found ${#album_dirs[@]} album(s) with WAV files"
+echo ""
+
+# Process each album
+for album_dir in "${album_dirs[@]}"; do
+    process_album "$album_dir"
+done
+
+# Summary
+echo "Processing Summary:"
+echo "=================="
+echo "Processed: $PROCESSED_COUNT files"
+echo "Skipped:   $SKIPPED_COUNT files"
+echo "Errors:    $ERROR_COUNT files"
+
+if [ "$ERROR_COUNT" -gt 0 ]; then
+    exit 1
+fi