Ubuntu – Play a random mp3 file

Firstly, I dislike Bash. Piping paths to processes isn't so nice, and causes all sorts of weirdness when not done 'just so'. That being said, many of the things that you are trying to do in Bash that are not kind with working or operating can be done with (unfortunately) more code, but can work the way you want it to, in other languages.

So, being somewhat bored and interested in creating something for this, I went and wrote a (very rough) Python script that can do what you're looking for. It may look complex, but it works pretty well, and I've put comments wherever or explained this below.

NOTE: I have only tested this with VLC player and Rhythmbox on my system, and with xdg-open which opens the GUI's default handler for the given file. In my case, VLC is the default that xdg-open calls. If you are on a GUI and just want to use the default Media player for the MP3 file, use xdg-open for "player".

Package Requirements On Your System:

• python (Python 2.6 or higher, but not Python 3)
• python-dev (Python libraries of importance)

Script Installation Process:

Not really much work here. But to make it simpler, follow these steps:

1. Create a bin folder in your home directory: mkdir /home/$USER/bin
2. Change directory to the new 'bin' folder: cd /home/$USER/bin
3. Create a file called randommp3. Copy-and-paste the code from the "Code/Script" section below into this file with a text editor. Save said file.
4. Make the file executable: chmod +x /home/$USER/bin/randommp3
5. Have fun, but note the following usage tidbits:
   • You have no choice but to specify what media player to use. oxmplayer would be what you would put in place of player when you execute the file.
   • If your music is not in /home/$USER/Music (where $USER is the currently logged in user), then you also have to specify the full directory path with the --dir argument (or one of its aliases as explained in the "usage" section below). If the folder path contains any spaces at all, you must wrap it in single quotes (for example, for the "My Music" directory in a given path, you would enter it as /path/to/My Music to the --dir argument).

Example execution:

Open a random MP3 file from the user's Music folder in their Home directory, in the GUI VLC Player

randommp3 vlc-wrapper

Open a random MP3 file from an external drive called "MusicDrive" mounted at Music Drive in the /media folder, in the media player called oxmplayer

randommp3 --dir '/media/Music Drive' oxmplayer

Usage

randommp3 [-h] [--dir DIRPATH] player

Open a random MP3 in the player of choice, or the default player

positional arguments:
  player                The executable name of the media player to open the
                        MP3 with. If none specified, uses the system default
                        player.

optional arguments:
  -h, --help            show this help message and exit
  --dir DIRPATH, --directory DIRPATH, --music-dir DIRPATH
                        The path to the directory where your music is stored.
                        If the path has spaces, wrap the entire path in
                        single-quotes ('/home/ubuntu/My Music/' for example).
                        If not specified, the current user's Music directory
                        in their /home/ folder is used.

Code: (or a link that you can save if you are really that lazy)

#!/usr/bin/python

import getpass
import subprocess as sp
import os
import glob
import random
import argparse

if __name__ == "__main__":
    # Parse arguments to the script
    argparser = argparse.ArgumentParser(description="Open a random MP3 in the player of choice, or the default player",
                                        add_help=True)
    argparser.add_argument('--dir', '--directory', '--music-dir', dest='dirpath', type=str,
                           default=str('/home/' + getpass.getuser() + '/Music'), required=False,
                           help="The path to the directory where your music is stored. If the path has spaces, wrap the "
                                "entire path in single-quotes ('/home/ubuntu/My Music/' for example). If not specified, "
                                "the current user's Music directory in their /home/ folder is used.")
    argparser.add_argument('player', type=str, help="The executable name of the media player "
                                                    "to open the MP3 with. If none specified, "
                                                    "uses the system default player.")

    # Using the above 'argparser' items, get the arguments for what we're going to be using.
    args = argparser.parse_args()

    # Gp to the directory your music is in.
    os.chdir(args.dirpath)
    mp3s = glob.glob('*.mp3')

    # Modify the directory path to make sure we have the trailing slash
    dirpath = args.dirpath
    if dirpath[-1] not in '/\\':
        dirpath += '/'

    # Actually open the MP3 file, and /dev/null to suppress output messages from the process.
    DEV_NULL = open(os.devnull, 'w')
    execpath = [args.player, '%s%s' % (dirpath, str(random.choice(mp3s)))]
    sp.Popen(execpath, stdout=DEV_NULL, stderr=DEV_NULL)