mirror of
https://github.com/KrumpetPirate/AAXtoMP3.git
synced 2024-11-18 03:08:57 +01:00
aa93813892
* Use lower case variable names * Extract debug print method * Split lines * Simplify looping over parameters * Use a temporary working directory for safety * Extract metadata fetching into functions * Don't replace colon in title It's in the directory structure anyway. * Use long ffmpeg options where possible And use the same options everywhere. * Don't print debug information during normal script run * Always read into a dummy variable rather than REPLY * Use `ffprobe` instead of `ffmpeg` to avoid non-zero exit code * Handle special characters like single quotes in metadata values * Stop the program if any errors occur * Use FD 9 for `while` loop input * Pass AAX file path to metadata extract command * Avoid skipping every second file * Don't check for `ffmpeg` The script will exit if it's not available. * Declare function variables local * Fix whitespace handling Works with filenames containing single quotes. * Use variables for reused paths * Put files in output directory immediately * Clarify debug output * Extract codec and extension for simple change * Encode audiobooks as FLAC * Put output files with input files * Remove metadata file between files * Default codec to MP3; enable FLAC using `--flac`
79 lines
2.2 KiB
Bash
Executable File
79 lines
2.2 KiB
Bash
Executable File
#!/usr/bin/env bash
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set -o errexit -o noclobber -o nounset -o pipefail
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codec=libmp3lame
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extension=mp3
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if [[ "$1" = '--flac' ]]
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then
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codec=flac
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extension=flac
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shift
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fi
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auth_code=$1
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shift
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debug() {
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echo "$(date "+%F %T%z") ${1}"
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}
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trap 'rm --recursive --force "${working_directory}"' EXIT
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working_directory="$(mktemp --directory)"
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metadata_file="${working_directory}/metadata.txt"
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save_metadata() {
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local media_file
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media_file="$1"
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ffprobe -i "$media_file" 2> "$metadata_file"
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}
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get_metadata_value() {
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local key
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key="$1"
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normalize_whitespace "$(grep --max-count=1 --only-matching "${key} *: .*" "$metadata_file" | cut --delimiter=: --fields=2 | sed -e 's#/##g;s/ (Unabridged)//' | tr -s '[:blank:]' ' ')"
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}
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get_bitrate() {
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get_metadata_value bitrate | grep --only-matching '[0-9]\+'
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}
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normalize_whitespace() {
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echo $*
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}
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for path
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do
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debug "Decoding ${path} with auth code ${auth_code}..."
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save_metadata "${path}"
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title=$(get_metadata_value title)
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output_directory="$(dirname "${path}")/$(get_metadata_value genre)/$(get_metadata_value artist)/${title}"
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mkdir -p "${output_directory}"
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full_file_path="${output_directory}/${title}.${extension}"
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ffmpeg -loglevel error -stats -activation_bytes "${auth_code}" -i "${path}" -vn -codec:a "${codec}" -ab "$(get_bitrate)k" "${full_file_path}"
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debug "Created ${full_file_path}."
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debug "Extracting chapter files from ${full_file_path}..."
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while read -r -u9 first _ _ start _ end
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do
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if [[ "${first}" = "Chapter" ]]
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then
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read -r -u9 _
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read -r -u9 _ _ chapter
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chapter_file="${output_directory}/${title} - ${chapter}.${extension}"
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ffmpeg -loglevel error -stats -i "${full_file_path}" -ss "${start%?}" -to "${end}" -codec:a copy "${chapter_file}"
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fi
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done 9< "$metadata_file"
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debug "Done creating chapters. Single file and chaptered files contained in ${output_directory}."
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cover_path="${output_directory}/cover.jpg"
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debug "Extracting cover into ${cover_path}..."
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ffmpeg -loglevel error -activation_bytes "${auth_code}" -i "${path}" -an -codec:v copy "${cover_path}"
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debug "Done."
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rm "${metadata_file}"
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done
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