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
​gtk	​http://ftp.gnome.org/pub/gnome/sources/gtk+/	UI Toolkit	both	Required. Server only supports version 2.x, version 3.x not fully supported by the client (#640)
​numpy	​http://sourceforge.net/projects/numpy/files/NumPy/	Python Buffers	both	Recommended
​pyopengl	​https://pypi.python.org/pypi/PyOpenGL and ​https://pypi.python.org/pypi/PyOpenGL-accelerate	OpenGL accelerated rendering	client
Network:
​rencode	​https://pypi.python.org/pypi/rencode/	PacketEncoding : rencode vs bencode	both	Recommended
​python-lz4	​https://github.com/python-lz4/python-lz4	lz4 packet compression	both	Recommended
​lzo	​http://www.oberhumer.com/opensource/lzo/download/	lzo packet compression	both
​pycrypto	​https://pypi.python.org/pypi/pycrypto/	Encryption	both
​python-cryptography	​https://pypi.python.org/pypi/cryptography	Encryption	both
​python-netifaces	​https://pypi.python.org/pypi/netifaces	​Multicast DNS session publishing	server
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
​pycuda	​https://pypi.python.org/pypi/pycuda	nvenc encoding	server
​cuda	​https://developer.nvidia.com/cuda-toolkit	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
​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	​http://cython.org/release/	Cython compiler

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	Current Version Used (Available)
​pywin32	​http://sourceforge.net/projects/pywin32/files/pywin32/	Native win32 API	220
​python-wmi	​https://pypi.python.org/pypi/WMI/#downloads	WMI API	1.4.9
​comtypes	​https://pypi.python.org/pypi/comtypes	COM bindings for webcam code	1.1.2
​putty	​http://tortoisesvn.net/downloads.html	SSH transport	1.8.11.26392 (see #1095 and note below)
​pygobjectwin32	​https://sourceforge.net/projects/pygobjectwin32/files/	GObject bindings for Python 3.x and more (GStreamer, GTK, etc)	3.18.2-rev7
​py2exe	​http://sourceforge.net/projects/py2exe/files/py2exe/	create standalone python 2.7 executables	0.6.9
​cx-freeze	​https://pypi.python.org/pypi/cx_Freeze	create standalone python 3.x executables	4.3.4
​InnoSetup	​http://www.jrsoftware.org/isdl.php	create installer package	5.5.6
​ffmpeg	​https://www.ffmpeg.org/download.html	ffmpeg	3.1.1
​cython	​http://cython.org/#download	cython	0.24
​openssl	​https://www.openssl.org/source/	crypto	1.0.2g
​ghostscript	​http://ghostscript.com/download/	Printing	9.19
​gsview	​http://pages.cs.wisc.edu/~ghost/gsview/index.htm	Printing	5.0

About putty: we use the ​tortoisesvn build which includes a better UI, but version 1.9 is no longer compatible with Windows XP.

For building the latest lz4, see ticket:878#comment:8

Mac OS X

The dependencies specific to Mac OS X are only required when building from source. The original reference documentation comes from winswitch: ​http://winswitch.org/dev/macosx-manual.html. Most of these dependencies are build tools and libraries which are not available by default with Apple's the developer tools.

Project	Source Download Link	Current Version Used (Available)
​yasm	​http://www.tortall.net/projects/yasm/releases/	1.3.0
​nasm	​http://www.nasm.us/pub/nasm/releasebuilds/	2.12
​gtk-mac-bundler	​http://ftp.gnome.org/pub/gnome/sources/gtk-mac-bundler/	0.7.4
​gmplib	​https://gmplib.org/download/gmp/	6.1.0
​pyobjc	​https://pypi.python.org/pypi/pyobjc	3.1.1
ORC	​http://gstreamer.freedesktop.org/src/orc/	0.4.24
​libpng	​ftp://ftp.simplesystems.org/pub/libpng/png/src/libpng16/	1.6.23
​libjpeg-turbo	​https://sourceforge.net/projects/libjpeg-turbo/files/	1.5.0
​ffmpeg	​https://www.ffmpeg.org/download.html	3.0.2
​cython	​http://cython.org/#download	0.24
​openssl	​https://www.openssl.org/source/	1.0.2g