From: Steven Baltakatei Sandoval Date: Tue, 26 Jul 2022 18:48:37 +0000 (+0000) Subject: feat(user/):Add script to convert files to FLAC with ffmpeg X-Git-Tag: 0.5.1~11 X-Git-Url: https://zdv2.bktei.com/gitweb/BK-2020-03.git/commitdiff_plain/54469ce4057294faebb283d7ed97e4d4ae89419d?ds=sidebyside feat(user/):Add script to convert files to FLAC with ffmpeg new file: user/convert_file_to_flac.sh --- diff --git a/user/convert_file_to_flac.sh b/user/convert_file_to_flac.sh new file mode 100644 index 0000000..f21a0fc --- /dev/null +++ b/user/convert_file_to_flac.sh @@ -0,0 +1,223 @@ +#!/bin/bash +# Desc: Converts file readable by ffmpeg to FLAC audio format +# Usage: convert_file_to_flac.sh [path] +# Version: 0.0.1 +# Ref/Attrib: [1] Convert audio file to FLAC with ffmpeg? https://superuser.com/a/802126 + +declare -Ag appRollCall # Associative array for storing app status +declare -Ag fileRollCall # Associative array for storing file status +declare -Ag dirRollCall # Associative array for storing dir status + +yell() { echo "$0: $*" >&2; } # print script path and all args to stderr +die() { yell "$*"; exit 111; } # same as yell() but non-zero exit status +try() { "$@" || die "cannot $*"; } # runs args as command, reports args if command fails +checkapp() { + # Desc: If arg is a command, save result in assoc array 'appRollCall' + # Usage: checkapp arg1 arg2 arg3 ... + # Version: 0.1.1 + # Input: global assoc. array 'appRollCall' + # Output: adds/updates key(value) to global assoc array 'appRollCall' + # Depends: bash 5.0.3 + local returnState + + #===Process Args=== + for arg in "$@"; do + if command -v "$arg" 1>/dev/null 2>&1; then # Check if arg is a valid command + appRollCall[$arg]="true"; + if ! [ "$returnState" = "false" ]; then returnState="true"; fi; + else + appRollCall[$arg]="false"; returnState="false"; + fi; + done; + + #===Determine function return code=== + if [ "$returnState" = "true" ]; then + return 0; + else + return 1; + fi; +} # Check that app exists +checkfile() { + # Desc: If arg is a file path, save result in assoc array 'fileRollCall' + # Usage: checkfile arg1 arg2 arg3 ... + # Version: 0.1.1 + # Input: global assoc. array 'fileRollCall' + # Output: adds/updates key(value) to global assoc array 'fileRollCall'; + # Output: returns 0 if app found, 1 otherwise + # Depends: bash 5.0.3 + local returnState + + #===Process Args=== + for arg in "$@"; do + if [ -f "$arg" ]; then + fileRollCall["$arg"]="true"; + if ! [ "$returnState" = "false" ]; then returnState="true"; fi; + else + fileRollCall["$arg"]="false"; returnState="false"; + fi; + done; + + #===Determine function return code=== + if [ "$returnState" = "true" ]; then + return 0; + else + return 1; + fi; +} # Check that file exists +checkdir() { + # Desc: If arg is a dir path, save result in assoc array 'dirRollCall' + # Usage: checkdir arg1 arg2 arg3 ... + # Version 0.1.2 + # Input: global assoc. array 'dirRollCall' + # Output: adds/updates key(value) to global assoc array 'dirRollCall'; + # Output: returns 0 if all args are dirs; 1 otherwise + # Depends: Bash 5.0.3 + local returnState + + #===Process Args=== + for arg in "$@"; do + if [ -z "$arg" ]; then + dirRollCall["(Unspecified Dirname(s))"]="false"; returnState="false"; + elif [ -d "$arg" ]; then + dirRollCall["$arg"]="true"; + if ! [ "$returnState" = "false" ]; then returnState="true"; fi + else + dirRollCall["$arg"]="false"; returnState="false"; + fi + done + + #===Determine function return code=== + if [ "$returnState" = "true" ]; then + return 0; + else + return 1; + fi +} # Check that dir exists +displayMissing() { + # Desc: Displays missing apps, files, and dirs + # Usage: displayMissing + # Version 1.0.0 + # Input: associative arrays: appRollCall, fileRollCall, dirRollCall + # Output: stderr: messages indicating missing apps, file, or dirs + # Output: returns exit code 0 if nothing missing; 1 otherwise + # Depends: bash 5, checkAppFileDir() + local missingApps value appMissing missingFiles fileMissing + local missingDirs dirMissing + + #==BEGIN Display errors== + #===BEGIN Display Missing Apps=== + missingApps="Missing apps :"; + #for key in "${!appRollCall[@]}"; do echo "DEBUG:$key => ${appRollCall[$key]}"; done + for key in "${!appRollCall[@]}"; do + value="${appRollCall[$key]}"; + if [ "$value" = "false" ]; then + #echo "DEBUG:Missing apps: $key => $value"; + missingApps="$missingApps""$key "; + appMissing="true"; + fi; + done; + if [ "$appMissing" = "true" ]; then # Only indicate if an app is missing. + echo "$missingApps" 1>&2; + fi; + unset value; + #===END Display Missing Apps=== + + #===BEGIN Display Missing Files=== + missingFiles="Missing files:"; + #for key in "${!fileRollCall[@]}"; do echo "DEBUG:$key => ${fileRollCall[$key]}"; done + for key in "${!fileRollCall[@]}"; do + value="${fileRollCall[$key]}"; + if [ "$value" = "false" ]; then + #echo "DEBUG:Missing files: $key => $value"; + missingFiles="$missingFiles""$key "; + fileMissing="true"; + fi; + done; + if [ "$fileMissing" = "true" ]; then # Only indicate if an app is missing. + echo "$missingFiles" 1>&2; + fi; + unset value; + #===END Display Missing Files=== + + #===BEGIN Display Missing Directories=== + missingDirs="Missing dirs:"; + #for key in "${!dirRollCall[@]}"; do echo "DEBUG:$key => ${dirRollCall[$key]}"; done + for key in "${!dirRollCall[@]}"; do + value="${dirRollCall[$key]}"; + if [ "$value" = "false" ]; then + #echo "DEBUG:Missing dirs: $key => $value"; + missingDirs="$missingDirs""$key "; + dirMissing="true"; + fi; + done; + if [ "$dirMissing" = "true" ]; then # Only indicate if an dir is missing. + echo "$missingDirs" 1>&2; + fi; + unset value; + #===END Display Missing Directories=== + + #==END Display errors== + #==BEGIN Determine function return code=== + if [ "$appMissing" == "true" ] || [ "$fileMissing" == "true" ] || [ "$dirMissing" == "true" ]; then + return 1; + else + return 0; + fi + #==END Determine function return code=== +} # Display missing apps, files, dirs +check_parsable_audio_ffprobe() { + # Desc: Checks if ffprobe returns valid audio codec name for file + # Usage: check_parsable_audio_ffprobe [path FILE] + # Version: 0.0.1 + # Input: arg1: file path + # Output: exit code 0 if returns valid codec name; 1 otherwise + # Depends: ffprobe, die() + local file_in ffprobe_out + + if [[ $# -ne 1 ]]; then die "ERROR:Invalid number of args:$#"; fi; + + file_in="$1"; + + # Check if ffprobe detects an audio stream + if ffprobe -v error -select_streams a -show_entries stream=codec_name -of default=nokey=1:noprint_wrappers=1 "$file_in" 1>/dev/null 2>&1; then + return_state="true"; + else + return_state="false"; + fi; + + # Fail if ffprobe returns no result + ffprobe_out="$(ffprobe -v error -select_streams a -show_entries stream=codec_name -of default=nokey=1:noprint_wrappers=1 "$file_in")"; + if [[ -z $ffprobe_out ]]; then + return_state="false"; + fi; + + # Report exit code + if [[ $return_state = "true" ]]; then + return 0; + else + return 1; + fi; +} # Checks if file has valid codec name using ffprobe +main() { + # Check inputs + if [[ ! -f $1 ]]; then die "FATAL:Not a file:$1"; fi; + if [[ $# -ne 1 ]]; then die "FATAL:Arguments not equal to 1:$#"; fi; + + # Check depends + if ! checkapp ffmpeg ffprobe; then + displayMissing; + die "FATAL:Missing apps"; fi; + + + # Check file is parsable by ffprobe + if ! check_parsable_audio_ffprobe "$1"; then + die "FATAL:Not an audio file:$1"; fi; + + # Convert file to FLAC + try ffmpeg -i "$1" -f "$1".flac +}; # main program + +main "$@"; + +# Author: Steven Baltakatei Sandoval +# License: GPLv3+