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101 lines
3.8 KiB
Bash
Executable File
101 lines
3.8 KiB
Bash
Executable File
#!/bin/zsh
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# --- Script Configuration for Robustness ---
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setopt ERR_EXIT NO_UNSET PIPE_FAIL
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# set -x # Uncomment this line for debugging output
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# --- FLAC to MP3 Converter (Zsh Script - find -exec) ---
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#
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# This script converts all FLAC files found in a specified input directory
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# and its subdirectories into MP3 files, saving them to a specified output directory
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# while preserving the original directory structure.
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#
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# Usage: ./convert_flac_to_mp3_find_exec.zsh <input_directory> <output_directory>
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#
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# Arguments:
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# <input_directory> : The path to the directory containing FLAC files.
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# <output_directory> : The path where the converted MP3 files will be saved.
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#
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# Requirements:
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# - ffmpeg: Must be installed and accessible in your system's PATH.
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# - realpath: Must be installed and accessible in your system's PATH.
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#
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# Example:
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# ./convert_flac_to_mp3_find_exec.zsh "/home/user/music/flac albums" "/home/user/music/mp3 converted"
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#
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# Check if ffmpeg is installed
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if ! command -v ffmpeg &> /dev/null; then
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echo "Error: ffmpeg is not installed. Please install it to use this script."
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exit 1
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fi
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# Check if realpath is installed
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if ! command -v realpath &> /dev/null; then
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echo "Error: realpath command not found. This script requires 'realpath' for robust path handling."
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echo "Please install it (e.g., 'sudo apt-get install realpath' on Debian/Ubuntu, or 'brew install coreutils' on macOS)."
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exit 1
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fi
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# Check for correct number of arguments
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if [ "$#" -ne 2 ]; then
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echo "Usage: $0 <input_directory> <output_directory>"
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echo "Example: $0 /path/to/flac_files /path/to/mp3_output"
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exit 1
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fi
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# Resolve input and output directories to their absolute, canonical paths.
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export INPUT_DIR=$(realpath "$1") # Export for the subshell
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export OUTPUT_DIR=$(realpath "$2") # Export for the subshell
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export INPUT_BASENAME=$(basename "$INPUT_DIR") # Export for the subshell
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# Check if resolved input directory exists
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if [ ! -d "$INPUT_DIR" ]; then
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echo "Error: Input directory '$INPUT_DIR' does not exist or is not a directory."
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exit 1
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fi
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# Create the output directory if it doesn't exist.
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mkdir -p "$OUTPUT_DIR"
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echo "Starting FLAC to MP3 conversion using find -exec..."
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echo "Input Directory (resolved): $INPUT_DIR"
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echo "Output Directory (resolved): $OUTPUT_DIR"
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echo "--------------------------------------------------"
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# Define a helper function to be called by find -exec.
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# This function will be executed in a new subshell for each file.
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exec_convert_single_file() {
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local FLAC_FILEPATH_CANONICAL=$(realpath "$1")
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local RELATIVE_PATH=$(realpath --relative-to="$INPUT_DIR" "$FLAC_FILEPATH_CANONICAL")
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local MP3_FILENAME="${RELATIVE_PATH%.flac}.mp3"
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local OUTPUT_FILEPATH="${OUTPUT_DIR}/${INPUT_BASENAME}/${MP3_FILENAME}"
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mkdir -p "$(dirname "$OUTPUT_FILEPATH")"
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echo "Converting: '$FLAC_FILEPATH_CANONICAL'"
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echo "Saving to: '$OUTPUT_FILEPATH'"
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ffmpeg -i "$FLAC_FILEPATH_CANONICAL" -map 0:a:0 -codec:a libmp3lame -b:a 320k -y "$OUTPUT_FILEPATH" >/dev/null 2>&1
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if [ $? -eq 0 ]; then
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echo "Successfully converted: '$MP3_FILENAME'"
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else
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echo "Error converting: '$FLAC_FILEPATH_CANONICAL'. Check ffmpeg output for details."
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# find -exec doesn't stop on errors by default, so we explicitly exit the subshell.
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return 1
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fi
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echo "--------------------------------------------------"
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}
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# Export the function so `find -exec zsh -c '...'` can see it.
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export -f exec_convert_single_file
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# Find all .flac files and execute the helper function for each.
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# Using `+` instead of `;` tells find to pass multiple files to a single invocation
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# of `zsh -c` if possible, which can be more efficient.
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find "$INPUT_DIR" -type f -name "*.flac" -exec zsh -c 'exec_convert_single_file "$@"' _ {} +
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echo "Conversion process completed."
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