1 GStreamer 1.17.x development series
6 This is GStreamer, a framework for streaming media.
13 https://gstreamer.freedesktop.org
15 Our documentation, including tutorials, API reference and FAQ can be found at
17 https://gstreamer.freedesktop.org/documentation/
19 You can subscribe to our mailing lists:
21 https://lists.freedesktop.org/mailman/listinfo/gstreamer-announce
23 https://lists.freedesktop.org/mailman/listinfo/gstreamer-devel
25 We track bugs, feature requests and merge requests (patches) in GitLab at
27 https://gitlab.freedesktop.org/gstreamer/
29 You can join us on IRC - #gstreamer on irc.freenode.org
38 The core around which all other modules revolve. Base functionality and
39 libraries, some essential elements, documentation, and testing.
43 A well-groomed and well-maintained collection of GStreamer plug-ins and
44 elements, spanning the range of possible types of elements one would want
45 to write for GStreamer.
47 And introducing, for the first time ever, on the development screen ...
51 --- "Such ingratitude. After all the times I've saved your life."
53 A collection of plug-ins you'd want to have right next to you on the
54 battlefield. Shooting sharp and making no mistakes, these plug-ins have it
55 all: good looks, good code, and good licensing. Documented and dressed up
56 in tests. If you're looking for a role model to base your own plug-in on,
59 If you find a plot hole or a badly lip-synced line of code in them,
60 let us know - it is a matter of honour for us to ensure Blondie doesn't look
61 like he's been walking 100 miles through the desert without water.
65 --- "When you have to shoot, shoot. Don't talk."
67 There are times when the world needs a color between black and white.
68 Quality code to match the good's, but two-timing, backstabbing and ready to
69 sell your freedom down the river. These plug-ins might have a patent noose
70 around their neck, or a lock-up license, or any other problem that makes you
71 think twice about shipping them.
73 We don't call them ugly because we like them less. Does a mother love her
74 son less because he's not as pretty as the other ones ? No - she commends
75 him on his great personality. These plug-ins are the life of the party.
76 And we'll still step in and set them straight if you report any unacceptable
77 behaviour - because there are two kinds of people in the world, my friend:
78 those with a rope around their neck and the people who do the cutting.
82 --- "That an accusation?"
84 No perfectly groomed moustache or any amount of fine clothing is going to
85 cover up the truth - these plug-ins are Bad with a capital B.
86 They look fine on the outside, and might even appear to get the job done, but
87 at the end of the day they're a black sheep. Without a golden-haired angel
88 to watch over them, they'll probably land in an unmarked grave at the final
91 Don't bug us about their quality - exercise your Free Software rights,
92 patch up the offender and send us the patch on the fastest steed you can
93 steal from the Confederates. Because you see, in this world, there's two
94 kinds of people, my friend: those with loaded guns and those who dig.
100 --- "I've never seen so many plug-ins wasted so badly."
102 GStreamer Plug-ins has grown so big that it's hard to separate the wheat from
103 the chaff. Also, distributors have brought up issues about the legal status
104 of some of the plug-ins we ship. To remedy this, we've divided the previous
105 set of available plug-ins into four modules:
107 - gst-plugins-base: a small and fixed set of plug-ins, covering a wide range
108 of possible types of elements; these are continuously kept up-to-date
109 with any core changes during the development series.
111 - We believe distributors can safely ship these plug-ins.
112 - People writing elements should base their code on these elements.
113 - These elements come with examples, documentation, and regression tests.
115 - gst-plugins-good: a set of plug-ins that we consider to have good quality
116 code, correct functionality, our preferred license (LGPL for the plug-in
117 code, LGPL or LGPL-compatible for the supporting library).
119 - We believe distributors can safely ship these plug-ins.
120 - People writing elements should base their code on these elements.
122 - gst-plugins-ugly: a set of plug-ins that have good quality and correct
123 functionality, but distributing them might pose problems. The license
124 on either the plug-ins or the supporting libraries might not be how we'd
125 like. The code might be widely known to present patent problems.
127 - Distributors should check if they want/can ship these plug-ins.
128 - People writing elements should base their code on these elements.
130 - gst-plugins-bad: a set of plug-ins that aren't up to par compared to the
131 rest. They might be close to being good quality, but they're missing
132 something - be it a good code review, some documentation, a set of tests,
133 a real live maintainer, or some actual wide use.
134 If the blanks are filled in they might be upgraded to become part of
135 either gst-plugins-good or gst-plugins-ugly, depending on the other factors.
137 - If the plug-ins break, you can't complain - instead, you can fix the
138 problem and send us a patch, or bribe someone into fixing them for you.
139 - New contributors can start here for things to work on.
144 - Linux is of course fully supported
145 - FreeBSD is reported to work; other BSDs should work too; same for Solaris
146 - MacOS works, binary 1.x packages can be built using the cerbero build tool
147 - Windows works; binary 1.x packages can be built using the cerbero build tool
149 - Microsoft Visual Studio builds are also available and supported
150 - Android works, binary 1.x packages can be built using the cerbero build tool
153 INSTALLING FROM PACKAGES
154 ------------------------
156 You should always prefer installing from packages first. GStreamer is
157 well-maintained for a number of distributions, including Fedora, Debian,
158 Ubuntu, Mandrake, Arch Linux, Gentoo, ...
160 Only in cases where you:
162 - want to hack on GStreamer
163 - want to verify that a bug has been fixed
164 - do not have a sane distribution
166 should you choose to build from source tarballs or git.
168 Find more information about the various packages at
170 https://gstreamer.freedesktop.org/download/
172 COMPILING FROM SOURCE TARBALLS
173 ------------------------------
175 - again, make sure that you really need to install from source!
176 If GStreamer is one of your first projects ever that you build from source,
177 consider taking on an easier project.
179 - you need a recent version of Meson installed, see
181 http://mesonbuild.com/Getting-meson.html
185 https://gitlab.freedesktop.org/gstreamer/gst-build/blob/master/README.md
194 - if you want to install it (not required, but what you usually want to do), run
196 ninja -C build install
198 - try out a simple test:
199 gst-launch-1.0 -v fakesrc num_buffers=5 ! fakesink
200 (If you didn't install GStreamer, run `./build/tools/gst-launch-1.0`)
202 If it outputs a bunch of messages from fakesrc and fakesink, everything is
205 If it did not work, keep in mind that you might need to adjust the
206 PATH and/or LD_LIBRARY_PATH environment variables to make the system
207 find GStreamer in the prefix where you installed (by default that is /usr/local).
209 - After this, you're ready to install gst-plugins, which will provide the
210 functionality you're probably looking for by now, so go on and read
216 You can build an uninstalled GStreamer from git for development or testing
217 purposes without affecting your system installation.
221 git clone https://gitlab.freedesktop.org/gstreamer/gst-build
224 ninja -C build uninstalled
226 For more information, see the `gst-build` module and its documentation:
228 https://gitlab.freedesktop.org/gstreamer/gst-build/blob/master/README.md
231 PLUG-IN DEPENDENCIES AND LICENSES
232 ---------------------------------
234 GStreamer is developed under the terms of the LGPL (see COPYING file for
235 details). Some of our plug-ins however rely on libraries which are available
236 under other licenses. This means that if you are distributing an application
237 which has a non-GPL compatible license (for instance a closed-source
238 application) with GStreamer, you have to make sure not to distribute GPL-linked
241 When using GPL-linked plug-ins, GStreamer is for all practical reasons
242 under the GPL itself.
247 The fundamental design comes from the video pipeline at Oregon Graduate
248 Institute, as well as some ideas from DirectMedia. It's based on plug-ins that
249 will provide the various codec and other functionality. The interface
250 hopefully is generic enough for various companies (ahem, Apple) to release
251 binary codecs for Linux, until such time as they get a clue and release the