View Source Membrane Opus plugin
Opus encoder and decoder.
It is a part of Membrane Multimedia Framework.
installation
Installation
The package can be installed by adding membrane_opus_plugin
to your list of dependencies in mix.exs
:
def deps do
[
{:membrane_opus_plugin, "~> 0.15.0"}
]
end
This package depends on libopus library.
ubuntu
Ubuntu
sudo apt-get install libopus-dev
arch-manjaro
Arch/Manjaro
pacman -S opus
macos
MacOS
brew install opus
usage
Usage
encoder
Encoder
The pipeline encodes a sample raw file and saves it as an opus file:
defmodule Membrane.ReleaseTest.Pipeline do
use Membrane.Pipeline
alias Membrane.RawAudio
@impl true
def handle_init(_) do
children = [
source: %Membrane.File.Source{
location: "/tmp/input.raw"
},
encoder: %Membrane.Opus.Encoder{
application: :audio,
input_caps: %RawAudio{
channels: 2,
sample_format: :s16le,
sample_rate: 48_000
}
},
parser: %Membrane.Opus.Parser{delimitation: :delimit},
sink: %Membrane.File.Sink{
location: "/tmp/output.opus"
}
]
links = [
link(:source)
|> to(:encoder)
|> to(:parser)
|> to(:sink)
]
{{:ok, spec: %ParentSpec{children: children, links: links}}, %{}}
end
end
Opus audio generally needs to be packaged in an Ogg container in order to be played by a
media player. See Membrane.Ogg.Payloader
in the Membrane Ogg Plugin.
decoder
Decoder
The pipeline parses, decodes a sample opus file and then saves it as a raw file:
defmodule Membrane.ReleaseTest.Pipeline2 do
use Membrane.Pipeline
@impl true
def handle_init(_) do
children = [
source: %Membrane.File.Source{
location: "/tmp/input.opus"
},
parser: Membrane.Opus.Parser,
opus: Membrane.Opus.Decoder,
sink: %Membrane.File.Sink{
location: "/tmp/output.raw"
}
]
links = [
link(:source)
|> to(:parser)
|> to(:opus)
|> to(:sink)
]
{{:ok, spec: %ParentSpec{children: children, links: links}}, %{}}
end
end
copyright-and-license
Copyright and License
Copyright 2019, Software Mansion
Licensed under the Apache License, Version 2.0