From: Steven Baltakatei Sandoval <baltakatei@gmail.com>
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+