MumbleDJ

A Mumble bot that plays music fetched from YouTube videos.

• Usage
• Features
• Commands
• Installation
  • YouTube API Keys
  • Setup Guide
  • Update Guide
• Troubleshooting
• Author
• License
• Thanks

USAGE

$ mumbledj -server=localhost -port=64738 -username=MumbleDJ -password="hunter2"

All commandline parameters are optional. Below are descriptions of all the available options:

• -server: The address of the Mumble server. Defaults to localhost.
• -port: The port number of the Mumble server. Defaults to 64738.
• -username: The username for the bot. Defaults to MumbleDJ.
• -password: The password for the Mumble server, if exists. Defaults to no password.
• -channel: The channel the bot enters after connecting to the Mumble server. Defaults to root.
• -cert: Path to user PEM certificate. Defaults to no cert.
• -key: Path to user PEM key. Defaults to no key.
• -insecure: If included, the bot will not check the certs for the server. Try using this commandline flag if you are having connection issues.
• -accesstokens: List of access tokens for the bot separated by spaces. Defaults to no access tokens.
• -verbose: Prints out song status into the console.

FEATURES

• Plays audio from both YouTube videos and YouTube playlists!
• Displays thumbnail, title, duration, submitter, and playlist title (if exists) when a new song is played.
• Incredible customization options. Nearly everything is able to be tweaked in ~/.mumbledj/mumbledj.gcfg.
• A large array of commands that perform a wide variety of functions.
• Built-in vote-skipping.
• Built-in caching system (disabled by default).

COMMANDS

These are all of the chat commands currently supported by MumbleDJ. All command names and command prefixes may be changed in ~/.mumbledj/config/mumbledj.gcfg.

Command	Description	Arguments	Admin	Example
add	Adds a YouTube video's audio to the song queue. If no songs are currently in the queue, the audio will begin playing immediately. YouTube playlists may also be added using this command. Please note, however, that if a YouTube playlist contains over 25 videos only the first 25 videos will be placed in the song queue.	youtube_video_url OR youtube_playlist_url	No	!add https://www.youtube.com/watch?v=5xfEr2Oxdys
skip	Submits a vote to skip the current song. Once the skip ratio target (specified in mumbledj.gcfg) is met, the song will be skipped and the next will start playing. Each user may only submit one skip per song.	None	No	!skip
skipplaylist	Submits a vote to skip the current playlist. Once the skip ratio target (specified in mumbledj.gcfg) is met, the playlist will be skipped and the next song/playlist will start playing. Each user may only submit one skip per playlist.	None	No	!skipplaylist
forceskip	An admin command that forces a song skip.	None	Yes	!forceskip
forceskipplaylist	An admin command that forces a playlist skip.	None	Yes	!forceskipplaylist
help	Displays this list of commands in Mumble chat.	None	No	!help
volume	Either outputs the current volume or changes the current volume. If desired volume is not provided, the current volume will be displayed in chat. Otherwise, the volume for the bot will be changed to desired volume if it is within the allowed volume range.	None OR desired volume	No	!volume 0.5, !volume
move	Moves MumbleDJ into channel if it exists.	Channel	Yes	!move Music
web	Displays a unique url for the user to control mumbledj from a web browser	None	No	!web
reload	Reloads mumbledj.gcfg to retrieve updated configuration settings.	None	Yes	!reload
reset	Stops all audio and resets the song queue.	None	Yes	!reset
numsongs	Outputs the number of songs in the queue in chat. Individual songs and songs within playlists are both counted.	None	No	!numsongs
nextsong	Outputs the title and name of the submitter of the next song in the queue if it exists.	None	No	!nextsong
currentsong	Outputs the title and name of the submitter of the song currently playing.	None	No	!currentsong
setcomment	Sets the comment for the bot. If no argument is given, the current comment will be removed.	None OR new_comment	Yes	!setcomment Hello! I am a bot. Type !help for the available commands.
numcached	Outputs the number of songs currently cached on disk.	None	Yes	!numcached
cachesize	Outputs the total file size of the cache in MB.	None	Yes	!cachesize
kill	Safely cleans the bot environment and disconnects from the server. Please use this command to stop the bot instead of force closing, as the kill command deletes any remaining songs in the ~/.mumbledj/songs directory.	None	Yes	!kill

INSTALLATION

###YOUTUBE API KEYS Effective April 20th, 2015, all requests to YouTube's API must use v3 of their API. Unfortunately, this means that all those who install an instance of the bot on their server must create their own API key to use with the bot. Below is a guide of the steps you must take to get proper YouTube support.

Important: MumbleDJ will simply not work anymore if you do not follow these steps and create a YouTube API key.

1) Navigate to the Google Developers Console and sign in to your Google account or create one if you haven't already.

2) Click the "Create Project" button and give your project a name. It doesn't matter what you set your project name to. Once you have a name click the "Create" button. You should be redirected to your new project once it's ready.

3) Click on "APIs & auth" on the sidebar, and then click APIs. Under the "YouTube APIs" header, click "YouTube Data API". Click on the "Enable API" button.

4) Click on the "Credentials" option underneath "APIs & auth" on the sidebar. Underneath "Public API access" click on "Create new Key". Click the "Server key" option.

5) Add the IP address of the machine MumbleDJ will run on in the box that appears. Click "Create".

6) You should now see that an API key has been generated. Copy it.

7) Open up ~/.bashrc with your favorite text editor (or ~/.zshrc if you use zsh). Add the following line to the bottom: export YOUTUBE_API_KEY="<your_key_here>". Replace <your_key_here> with your API key.

8) Close your current terminal window and open another one up. You should be able to use MumbleDJ now!

###SETUP GUIDE
1) Install and correctly configure Go (1.4 or higher). Specifically, make sure to follow this guide and set the GOPATH environment variable properly.

2) Install ffmpeg and mercurial if they are not already installed on your system. Also be sure that you have opus and its development headers installed on your system, as well as openal (check your distributions repo for the package name).

3) Install youtube-dl. It is recommended to install youtube-dl through the method described on the linked GitHub page, rather than installing through a distribution repository. This ensures that you get the most up-to-date version of youtube-dl.

4) If you wish to install MumbleDJ without any further root privileges, make sure that ~/bin exists and is added to your $PATH. If this step is not done, the Makefile will place the MumbleDJ binary in /usr/local/bin instead, which requires root privileges.

5) Clone the MumbleDJ repository or download the latest release.

6) cd into the MumbleDJ repository directory and execute the following commands:

$ make
$ make install

7) Edit ~/.mumbledj/config/mumbledj.gcfg to your liking. This file will be overwritten if the config file structure is changed in a commit, but a backup is always stored at ~/.mumbledj/config/mumbledj_backup.gcfg.

8) Execute the command shown at the top of this README document with your credentials, and the bot should be up and running!

Recommended, but not required: Set opusthreshold=0 in /etc/mumble-server.ini or /etc/murmur.ini. This will force the server to always use the Opus audio codec, which is the only codec that MumbleDJ supports.

###UPDATE GUIDE 1) git pull or download the latest release.

2) Issue the following commands within your updated MumbleDJ directory:

$ make clean
$ make
$ make install

NOTE: It is very important that you use make instead of make build when updating MumbleDJ as the first option will grab the latest updates from MumbleDJ's dependencies.

3) Check to make sure your configuration in ~/.mumbledj/config/mumbledj.gcfg is the same as before. If it is back to the default, a backup should have been created at ~/.mumbledj/config/mumbledj_backup.gcfg so you can copy the values back over.

TROUBLESHOOTING

YouTube videos downloads work when using youtube-dl but not within MumbleDJ.

This is likely related to how you set up your Google account for the YouTube API. Specifically, make sure you you try using an IPv4 server address in the list of allowed IPs if you were using IPv6 previously.

Whenever the !add command is used I receive the following message in chat: "The audio download for this video failed. YouTube has likely not generated the audio files for this video yet. Skipping to the next song!"

First, make sure you have youtube-dl installed and it is the latest version. MumbleDJ makes use of youtube-dl's -- commandline argument which is not supported in older versions.

If this doesn't fix the issue, try the following fix from @MrKrucible:

I fixed it by following the instructions here to set default arguments: https://github.com/rg3/youtube-dl/blob/master/README.md#configuration

For the lazy...

• 1. First make ~/.config/youtube-dl/ and create a file named config.
• 2. Then put --force-ipv4 into the config. Nothing else needs to be in there unless you want to add more arguments.

I receive the following error when compiling MumbleDJ: "undefined: tls.DialWithDialer"

This issue is caused by having an outdated version of Go. Make sure you are using the latest available version of Go.

I can't get MumbleDJ to compile correctly under gccgo

Unfortunately MumbleDJ likely will not work with gccgo. MumbleDJ is developed and tested on vanilla Go.

I receive the following message when compiling MumbleDJ: "local.h:6:19: error: AL/alc.h: No such file or directory"

Don't worry about it. The compilation went through successfully, OpenAL is not needed by the bot.

I receive the following message when building MumbleDJ: "cannot create <nil>/go.o: No such file or directory"

Execute the following before building:

export TMPDIR=/tmp

AUTHOR

Matthieu Grieger

LICENSE

The MIT License (MIT)

Copyright (c) 2014, 2015 Matthieu Grieger

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
THE SOFTWARE.

THANKS

• All those who contribute to Mumble.
• Tim Cooper for gumble.
• Ricardo Garcia for youtube-dl.
• ScalingData for gcfg.
• Jason Moiron for jsonq.
• Nitrous.IO for goop.