dca

README

dca

This is a command line tool for creating DCA files

If you are developing a library for use with Discord you can use this program as a way to generate the opus audio data from any standard audio file.

You can also pipe the output of this program to create a .dca file for later use.

• See Discordgo for Discord API bindings in Go.
• See the wiki for more information on the DCA1 standard.

Join #go_discordgo Discord chat channel for support.

Features

• Stereo Audio
• 48khz Sampling Rate
• 20ms / 1920 byte audio frame size
• Bit-rates from 8 kb/s to 128 kb/s
• Optimization setting for VoIP, Audio, and Low Delay audio

Getting Started

Installing

dca has been tested to compile on FreeBSD 10 (Go 1.5.1), OS X 10.10, Windows 10.

Ubuntu 14.04.3 LTS

Provided by Uniquoooo

# basics
sudo apt-get update
# golang
mkdir $HOME/go
echo 'export GOPATH=$HOME/go' >> ~/.bashrc
echo 'export PATH=$PATH:$GOPATH/bin' >> ~/.bashrc
source ~/.bashrc
# ffmpeg
sudo add-apt-repository ppa:kirillshkrogalev/ffmpeg-next
sudo apt-get update
sudo apt-get install ffmpeg --yes
# install dca
go get github.com/jonas747/dca/cmd/dca

Note: If Go complains that GOPATH is not defined, try run source ~/.bashrc and then go get github.com/jonas747/dca/cmd/dca.

Windows

Install Go for Windows
Install ffmpeg
Setup gopath to some empty folder (for example, I made mine C:\gopath)
go get github.com/jonas747/dca/cmd/dca
dca should now be built in %GOPATH%/bin

OS X

Provided by Uniquoooo

This way uses Homebrew, download it from here.

$ brew install ffmpeg --with-opus
$ brew install golang
$ go get github.com/jonas747/dca/cmd/dca

Usage

Usage of ./dca:
  -aa string
        audio application can be voip, audio, or lowdelay (default "audio")
  -ab int
        audio encoding bitrate in kb/s can be 8 - 128 (default 64)
  -ac int
        audio channels (default 2)
  -ar int
        audio sampling rate (default 48000)
  -as int
        audio frame size can be 960 (20ms), 1920 (40ms), or 2880 (60ms) (default 960)
  -cf string
        format the cover art will be encoded with (default "jpeg")
  -i string
        infile (default "pipe:0")
  -vol int
        change audio volume (256=normal) (default 256)

You may also pipe audio audio into dca instead of providing an input file.

Examples

See the example folder.

Contributing

While contributions are always welcome - this code is in a very early and incomplete stage and massive changes, including entire re-writes, could still happen. In other words, probably not worth your time right now :)

List of Discord APIs

See this chart for a feature comparison and list of other Discord API libraries.