#### Beyond Linux® From Scratch (systemd Edition) - Version 11.1

### Chapter 42. Multimedia Libraries and Drivers

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# Pipewire-0.3.47

## Introduction to Pipewire

The pipewire package contains a server and user-space API to handle multimedia pipelines. This includes a universal API to connect to multimedia devices, as well as sharing multimedia files between applications.

This package is known to build and work properly using an LFS-11.1 platform.

### Package Information

- Download (HTTP): https://github.com/PipeWire/pipewire/archive/0.3.47/pipewire-0.3.47.tar.gz

- Download MD5 sum: 38f2662f638cca4472c0de7262b5445f

- Download size: 1.7 MB

- Estimated disk space required: 60 MB (with tests)

- Estimated build time: 0.4 SBU (with tests, both using parallelism=4)

### Pipewire Dependencies

#### Recommended

BlueZ-5.63, FFmpeg-4.4.1, gstreamer-1.20.0, gst-plugins-base-1.20.0, libva-2.13.0, PulseAudio-15.0, SBC-1.5, SDL2-2.0.20, and v4l-utils-1.22.1

#### Optional

Valgrind-3.18.1, Doxygen-1.9.3 and Graphviz-2.50.0 (for documentation), JACK, ldacBT, libcamera, Vulkan, and xmltoman

User Notes: https://wiki.linuxfromscratch.org/blfs/wiki/pipewire

## Installation of Pipewire

Install pipewire by running the following commands:

    mkdir build &&
    cd    build &&

    meson --prefix=/usr --buildtype=release -Dsession-managers= .. &&
    ninja

To test the result, issue: ninja test.

Now, as the `root` user:

    ninja install

## Command Explanations

`--buildtype=release`: Specify a buildtype suitable for stable releases of the package, as the default may produce unoptimized binaries.

`-Dsession-managers=`: This switch prevents automatic downloading external dependencies.

`-Ddocs=true`: This switch enables the generation of HTML documentation. The optional dependencies for documentation need to be installed for this to work.

`-Dman=true`: This switch enables the generation of manual pages. The optional dependencies for documentation need to be installed for this to work.

## Contents

Installed Programs: pipewire, pipewire-media-session, pipewire-pulse, pw-cat, pw-cli, pw-dot, pw-dump, pw-jack, pw-link, pw-loopback, pw-metadata, pw-mididump, pw-mon, pw-profiler, pw-reserve, pw-top, pw-v4l2, spa-acp-tool, spa-inspect, spa-json-dump, spa-monitor, spa-resample, and pw-dsdplay, pw-midiplay, pw-midirecord, pw-play, and pw-record (symlinks to pw-cat)
Installed Libraries: libpipewire-0.3.so and 30 modules below /usr/lib/pipewire-0.3
Installed Directories: /etc/pipewire, /usr/include/pipewire-0.3, /usr/include/spa-0.2, /usr/lib/alsa-lib, /usr/lib/gstreamer-1.0, /usr/lib/pipewire-0.3, and /usr/lib/spa-0.2

### Short Descriptions

pipewire | is a service that allows access to multimedia devices and allows sharing of multimedia files between applications
pipewire-media-session | is a service that allows a desktop environment to know when media files are being played through pipewire
pipewire-pulse | starts a Pulseaudio-compatible version of the pipewire service
pw-cat | allows you to play or record media using a pipewire instance
pw-cli | allows you to interact with a pipewire instance
pw-dot | lists all of the daemons and objects in use by pipewire
pw-dump | dumps debug messages from a local or remote pipewire instance to the console
pw-jack | runs JACK applications on a pipewire instance
pw-link | links pipewire ports together
pw-loopback | initializes a loopback link between two different pipewire ports. This is useful for testing and debugging
pw-metadata | inspects, adds, and removes metadata for objects
pw-mididump | dumps MIDI messages from a file to the screen
pw-mon | allows you to monitor pipewire instances
pw-profiler | tracks memory usage and API calls used by pipewire
pw-reserve | reserves or monitors a device via D-Bus
pw-top | displays real-time performance information from pipewire
pw-v4l2 | runs v4l2 applications on a pipewire instance
spa-acp-tool | inspects the card profile of a given sound card
spa-inspect | allows you to inspect pipewire plugins
spa-json-dump | dumps the current pipewire configuration in JSON format.
spa-monitor | allows you to monitor pipewire plugins
spa-resample | resamples a given file
`libpipewire-0.3.so` | contains API functions for handling multimedia pipelines

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