Dependencies

Common Dependencies

Most of these dependencies should be installed automatically when you install packages. Unless otherwise stated, the dependencies are all optional.

Project	Source Download Link	Purpose	Client or Server	Notes
​glib	​https://ftp.gnome.org/pub/gnome/sources/glib/	both	Required
​gtk	​http://ftp.gnome.org/pub/gnome/sources/gtk+/	UI Toolkit	both	Required. GTK3: see #640
​numpy	​https://pypi.org/project/numpy/#files	Python Buffers	both	Recommended
​pyopengl	​https://pypi.python.org/pypi/PyOpenGL and ​https://pypi.python.org/pypi/PyOpenGL-accelerate	OpenGL accelerated rendering	client
​pycups	​https://pypi.org/project/pycups/	wiki/Printing	both
-
Network:
​rencode	​https://pypi.python.org/pypi/rencode/	PacketEncoding : rencode vs bencode	both	Recommended
​pyyaml	​https://pypi.python.org/pypi/PyYAML/	packet encoder	both	optional (usually unused)
​lz4	​https://github.com/lz4/lz4/releases	lz4 packet compression	both	Recommended
​python-lz4	​https://github.com/python-lz4/python-lz4	python wrapper for lz4	both	Recommended
​lzo	​http://www.oberhumer.com/opensource/lzo/#download	lzo packet compression	both	optional - deprecated (usually unused as lz4 is better) - win32 build, see #1044
​python-lzo	​https://pypi.org/project/python-lzo/	python wrapper for lzo	both	optional
​python-cryptography	​https://pypi.python.org/pypi/cryptography	Encryption	both
​python-zeroconf	​https://pypi.org/project/zeroconf/	?	0.19.1 is the last version supported with python2
​python-netifaces	​https://pypi.python.org/pypi/netifaces	​Multicast DNS session publishing	server
​dbus-python	​https://dbus.freedesktop.org/releases/dbus-python/	desktop integration, server control interface	both	not applicable to MS Windows or Mac OSX
​websocket-client	​https://pypi.python.org/pypi/websocket-client/	websocket client connections	client
​websockify	​https://pypi.python.org/pypi/websockify/	websocket server connections	server
​openssl	​https://www.openssl.org/source/	SSL	both
​paramiko	​https://pypi.org/project/paramiko/	ssh integration	both
​sshpass	​https://sourceforge.net/projects/sshpass/files/sshpass/	non-interactive SSH password authentication	usually client
​brotli	​https://github.com/google/brotli/releases	HTML client compression	r15540
-
Authentication:
​python-gssapi	​https://pypi.org/project/python-gssapi	GSSAPI Authentication	server	#1691
​python-kerberos	​https://pypi.org/project/kerberos/	Kerberos Authentication	server	#1691
​python-ldap	​https://pypi.org/project/python-ldap/	LDAP Authentication	server	#1691
​python-ldap3	​https://pypi.org/project/ldap3/	LDAP v3 Authentication	server	#1691
​pyu2f	​https://pypi.org/project/pyu2f/	U2F Authentication	server	#1789
-
Python module dependencies:
​python-ipaddress	​https://pypi.org/project/ipaddress/	unspecified: r11859
​python-idna	​https://pypi.org/project/idna/	unspecified: r11860
​python-decorator	​https://pypi.org/project/decorator/	required by gssapi: r18781
​pytest-runner	​https://pypi.org/project/pytest-runner/	required by python-lz4: r17864
​python-deprecation	​https://pypi.org/project/deprecation/	required by python-lz4: r17749
​python-pkgconfig	​https://pypi.org/project/pkgconfig/	required by python-lz4: r17748
​python-setuptools-scm	​https://pypi.org/project/setuptools-scm/	required by python-lz4: r15282
​https://nose.readthedocs.io/en/latest/	​https://pypi.org/project/nose/	required by python-lz4: r8676
​pyasn1	​https://pypi.org/project/pyasn1/	unspecified: r5829
​asn1crypto	​https://pypi.org/project/asn1crypto/	required by python-cryptography: r17856
​python-packaging	​https://pypi.org/project/packaging/	required by python-cryptography: r15310
​pyparsing	​https://pypi.org/project/pyparsing/	required by python-cryptography: r15310
​cffi	​https://pypi.org/project/cffi/	required by python-cryptography: r11633
​six	​https://pypi.org/project/six/	required by python-cryptography: r11640
​enum-compat	​https://pypi.org/project/enum-compat/	required by zeroconf: r20441
​enum34	​https://pypi.org/project/enum34/	required by enum-compat: r15397
​setuptools	​https://pypi.org/project/setuptools/	unspecified: r5829
​pycparser	​https://pypi.org/project/pycparser/	required by cffi: r11634
​pynacl	​https://pypi.org/project/PyNaCl/	crypto library used by paramiko: r19967
​bcrypt	​https://pypi.org/project/bcrypt/	crypto library used by paramiko: r19965
-
Picture encoding dependencies:
​x264	​ftp://ftp.videolan.org/pub/x264/snapshots/	h264 encoding	server
​ffmpeg	​http://ffmpeg.org/releases/	h264, h265, vp8 and vp9 decoding	client
​vpx	​http://downloads.webmproject.org/releases/webm/index.html	vp8 and vp9 codec	both
​webp	​http://downloads.webmproject.org/releases/webp/index.html	webp codec	both
​libpng	​ftp://ftp.simplesystems.org/pub/libpng/png/src/libpng16/	png encoding	both
​libjpeg-turbo	​https://sourceforge.net/projects/libjpeg-turbo/files/	jpeg encoding	both
​python-pillow	​https://pypi.python.org/pypi/Pillow	png,jpeg,webp encoding and decoding, format conversion	both	Required
​opencv	​http://opencv.org/downloads.html	webcam capture	client
​libyuv	​https://chromium.googlesource.com/libyuv/libyuv/	wiki/CSC	both
​pycuda	​https://pypi.python.org/pypi/pycuda	nvenc encoding	server
​cuda	​https://developer.nvidia.com/cuda-toolkit	nvenc encoding	server
​pyNVML	​nvidia-ml-py	nvenc encoding	server
-
Sound dependencies:
​Ogg	​http://downloads.xiph.org/releases/ogg/	ogg container format	both
​opus	​http://downloads.xiph.org/releases/opus/	Sound codec	both
​Flac	​http://downloads.xiph.org/releases/flac/	flac codec	both
​Speex	​http://downloads.xiph.org/releases/speex/	speex codec	both
​Vorbis	​http://downloads.xiph.org/releases/vorbis/	vorbis codec	both
​wavpack	​http://www.wavpack.com/downloads.html	wavpack codec	both
​faac	​http://faac.sourceforge.net/	aac encoder	both
​faad	​http://faac.sourceforge.net/	aac decoder	both
​lame	​http://sourceforge.net/projects/lame/files/lame/	MP3 codec	both
​TwoLame	​http://sourceforge.net/projects/twolame/files/twolame/	MP3 encoding	both
​Mad	​http://sourceforge.net/projects/mad/files/libmad/	MP3 decoding	both
​gstreamer	​http://gstreamer.freedesktop.org/src/	sound support	both
-
Build dependencies:
​cython	​https://pypi.python.org/pypi/Cython/	Cython compiler
​yasm	​http://www.tortall.net/projects/yasm/releases/	Assembler optimizations
​nasm	​http://www.nasm.us/pub/nasm/releasebuilds/	Assembler optimizations
ORC	​http://gstreamer.freedesktop.org/src/orc/	Sound codecs
​gmplib	​https://gmplib.org/download/gmp/	Sound codecs
​mpfr	​https://ftp.gnu.org/gnu/mpfr/	Sound codecs
​liboil	​https://liboil.freedesktop.org/download/	|Sound codecs

MS Windows

The dependencies specific to MS Windows are only required when building from source. The original reference documentation comes from winswitch: ​http://winswitch.org/dev/win32.html.

Project	Source Download Link	Purpose
​comtypes	​https://pypi.python.org/pypi/comtypes	COM bindings for webcam code
​putty	​http://tortoisesvn.net/downloads.html	SSH transport (fallback)
​cx-freeze	​https://pypi.python.org/pypi/cx_Freeze	create standalone executables
​InnoSetup	​http://www.jrsoftware.org/isdl.php	create installer package

About putty: we use the ​tortoisesvn build which includes a GUI for validating hosts signatures and asking for usernames + passwords. On other platforms, we use openssh or paramiko (see #1646).

Mac OS X

The dependencies specific to Mac OS X are only required when building from source. Most of these dependencies are build tools and libraries which are not available by default from Apple's developer tools.

Project	Source Download Link
​gtk-mac-bundler	​http://ftp.gnome.org/pub/gnome/sources/gtk-mac-bundler/
​py2app	​https://pypi.org/project/py2app/
​pyobjc:
	​https://pypi.org/project/pyobjc-core/
	​https://pypi.org/project/pyobjc-framework-Cocoa/
	​https://pypi.org/project/pyobjc-framework-Quartz/
	​https://pypi.org/project/pyobjc-framework-AVFoundation/
	​https://pypi.org/project/pyobjc-framework-SystemConfiguration/
​modulegraph	​https://pypi.org/project/modulegraph/
​macholib	​https://pypi.org/project/macholib/
​cpio	​https://www.gnu.org/software/cpio/
​pcre	​https://ftp.pcre.org/pub/pcre/
​grep	​https://ftp.gnu.org/gnu/grep/
​bomutils	​https://github.com/hogliux/bomutils/releases
​xar	​https://github.com/mackyle/xar/releases
​curl	​https://curl.haxx.se/download.html