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[Script] TimeTraveler : Modifier le tempo de fichiers mp3 à la volée

Bonjour à tous.

Je mets à disposition mon tout premier script bash : j'ai nommé TimeTraveler.

Celui-ci permet de traiter tous les mp3 (il faudrait que je l'adapte pour qu'il prenne en compte les ogg également) d'un dossier: le script crée un sous-dossier qui accueille la copie de ces fichiers avec un tempo modifié (vous pouvez modifier la valeur du tempo dans le script).

Il ne prend aucun argument pour l'instant (il doit se lancer dans le dossier à traiter) et nécessite l'installation de sox et libsox-fmt-mp3.

#!/bin/bash

# TimeTraveler
# This script gets all the mp3 of a folder and creates a copy of them with a different tempo in a subfolder.
# The script must be called without arguments in the wanted folder.
# For now the script only works with mp3. It needs that packages libsox-fmt-mp3 and sox are installed (sudo apt-get install libsox-fmt-mp3 sox).


##### VARIABLES TO EDIT #######

# New tempo (1.35 means increasing the tempo of 35%, 0.8 means reducing it of 20%)
tempoValue=1.25
# Name of the subfolder which will receive the modified mp3 files
outputName="TempoFiles"
# Extension to add to new files after the treatment (facultative). Ex: file1.mp3 will have a modified copy called file1--tempo.mp3. Let it empty if you want to keep the same filename.
outputExtension="--tempo"

################################



## Declaration of useful colors for the display of the script
BLUE="\\033[1;34m"
GREEN="\\033[1;32m"
YELLOW="\\033[1;33m"
TEAL="\\033[1;36m"
RED="\\033[1;31m"
PINK="\\033[1;35m"
DEFAULT="\\033[0;39m"

## Declaration of useful variables
workingDirectory=`pwd`
outputFolder=$workingDirectory/$outputName
packageList=('sox' 'libsox-fmt-mp3') # Array with required dependencies



## Welcome

echo -e "\n" # Space insertion
echo -e "$TEAL" "===== TimeTraveler ===== $DEFAULT"
echo -e "This script only treats the mp3 files in the current folder.\n"
echo -e "The script checks if the required dependencies are installed.\n"


## Dependencies check

counterUninstalled=0 # We initialize a counter to keep in track the number of uninstalled packages
for package in "${packageList[@]}" # For every required package...
do
    if [[ -z `dpkg --get-selections | grep -w ^$package[^-]` ]] # Is it installed?
    then # If not...
        counterUninstalled+=1
        echo -e "$RED" "The $package package is not installed" "$DEFAULT"

    else # If yes...
        echo -e "$GREEN" "The $package package is installed" "$DEFAULT"
    fi
done # End of forloop (for every required package)

if [[ $counterUninstalled -gt 0 ]] # If one package is not installed
then
    if [[ $counterUninstalled -gt 1 ]] # If several packages are not installed
    then
        echo -e "$RED" "Several required packages are not installed. TimeTraveler can't run correctly without them." "$DEFAULT"
    else # If only one package is not installed
        echo -e "$RED" "A required packaged is not installed. TimeTraveler can't run correctly without it." "$DEFAULT"
    fi # end of the test "If one package at least is not installed"

    while [[ ${continueDespiteErrors,,} != y && ${continueDespiteErrors,,} != yes && ${continueDespiteErrors,,} != n && ${continueDespiteErrors,,} != no ]]
    do
        read -p "Do you want to continue the script anyway? [Y/N] : " continueDespiteErrors # Prompt
    done
fi


## Execution of the script

if [[ ${continueDespiteErrors,,} == 'y' ]] || [[ ${continueDespiteErrors,,} == 'yes' || $counterUninstalled -eq 0 ]] # If the user want to continue or if everything is correctly installed
then
    echo -e "\n"
    echo -e "The script is going to analyze the current folder.\n"

    sleep 1.5

    if [ -d $outputFolder ]    # Does the folder exist?
    then
        echo -e "$GREEN" "The output folder $outputFolder does exist." "$DEFAULT"
    else
        echo -e "$YELLOW" "The output folder $outputFolder does not exist. It is going to be created." "$DEFAULT"
        mkdir $outputFolder
    fi

    
    if [ -r $outputFolder ] && [ -w $outputFolder ] # Is the folder writable?
    then
        echo -e "$GREEN" "The output folder $outputFolder is readable and writable.\n" "$DEFAULT"
        sleep 1.5

        ## List of the files in the current folder
        counter=0
        shopt -s nullglob
        for file in *.mp3    # For every mp3 file in the folder
        do
            if [[ -f $file ]]    # And if it's not a folder
            then
                treatment="Treatment of the file called $PINK$file$DEFAULT:"
                outputName=${file%.mp3}   # Removing the mp3 output of the file. (For the explanation: http://stackoverflow.com/questions/125281/how-do-i-remove-the-file-suffix-and-path-portion-from-a-path-string-in-bash)
                outputName+=$outputExtension # Adding the extension that was put on the top of the script
                outputName+=".mp3"    # Adding the mp3 extension
                fileoutput="$outputFolder/$outputName"   # Final address of the mp3 output file



                if [[ ! -f $fileoutput ]] 
                then # If the file does not exist
                    echo -e "$treatment$YELLOW The file is going to be TimeTraveled$DEFAULT"
                    sleep 1
                    sox -S "$file" "$fileoutput" tempo $tempoValue   # We give to sox the result
                    counter+=1
                else # If it does exist
                    echo -e "$treatment$GREEN OK$DEFAULT"
                fi

            fi
        done

        if [ $counter -eq 0 ] # If no file needs to be treated
        then
            echo -e "\n"
            echo -e "$BLUE" "All files are already TimeTraveled." "$DEFAULT"
            echo -e "\n"
        else
            echo -e "\n"
            echo -e "$BLUE" "All files have been TimeTravalled." "$DEFAULT"
            echo -e "\n"
        fi

    else # If the output folder can't be written or read
        echo -e "$RED" "The $outputFolder folder can't be read or written." "$DEFAULT"
    fi

else # If the user doesn't want to use the script anymore
    echo -e "$BLUE" "Please install the required packages." "$DEFAULT"
fi

Edit : Le script a évolué (prise en compte de paramètres) et est disponible sur GitHub.

Dernière modification par Einenlum (Le 11/05/2014, à 15:55)

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