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GStreamer 1.18.x stable seriesWHAT IT IS----------This is GStreamer, a framework for streaming media.WHERE TO START--------------We have a website athttps://gstreamer.freedesktop.orgOur documentation, including tutorials, API reference and FAQ can be found athttps://gstreamer.freedesktop.org/documentation/You can subscribe to our mailing lists:https://lists.freedesktop.org/mailman/listinfo/gstreamer-announcehttps://lists.freedesktop.org/mailman/listinfo/gstreamer-develWe track bugs, feature requests and merge requests (patches) in GitLab athttps://gitlab.freedesktop.org/gstreamer/You can join us on IRC - #gstreamer on irc.freenode.orgGStreamer 1.0 series--------------------StarringGSTREAMERThe core around which all other modules revolve. Base functionality andlibraries, some essential elements, documentation, and testing.BASEA well-groomed and well-maintained collection of GStreamer plug-ins andelements, spanning the range of possible types of elements one would wantto write for GStreamer.And introducing, for the first time ever, on the development screen ...THE GOOD--- "Such ingratitude. After all the times I've saved your life."A collection of plug-ins you'd want to have right next to you on thebattlefield. Shooting sharp and making no mistakes, these plug-ins have itall: good looks, good code, and good licensing. Documented and dressed upin tests. If you're looking for a role model to base your own plug-in on,here it is.If you find a plot hole or a badly lip-synced line of code in them,let us know - it is a matter of honour for us to ensure Blondie doesn't looklike he's been walking 100 miles through the desert without water.THE UGLY--- "When you have to shoot, shoot. Don't talk."There are times when the world needs a color between black and white.Quality code to match the good's, but two-timing, backstabbing and ready tosell your freedom down the river. These plug-ins might have a patent noosearound their neck, or a lock-up license, or any other problem that makes youthink twice about shipping them.We don't call them ugly because we like them less. Does a mother love herson less because he's not as pretty as the other ones ? No - she commendshim on his great personality. These plug-ins are the life of the party.And we'll still step in and set them straight if you report any unacceptablebehaviour - because there are two kinds of people in the world, my friend:those with a rope around their neck and the people who do the cutting.THE BAD--- "That an accusation?"No perfectly groomed moustache or any amount of fine clothing is going tocover up the truth - these plug-ins are Bad with a capital B.They look fine on the outside, and might even appear to get the job done, butat the end of the day they're a black sheep. Without a golden-haired angelto watch over them, they'll probably land in an unmarked grave at the finalshowdown.Don't bug us about their quality - exercise your Free Software rights,patch up the offender and send us the patch on the fastest steed you cansteal from the Confederates. Because you see, in this world, there's twokinds of people, my friend: those with loaded guns and those who dig.You dig.The Lowdown-------------- "I've never seen so many plug-ins wasted so badly."GStreamer Plug-ins has grown so big that it's hard to separate the wheat fromthe chaff. Also, distributors have brought up issues about the legal statusof some of the plug-ins we ship. To remedy this, we've divided the previousset of available plug-ins into four modules:- gst-plugins-base: a small and fixed set of plug-ins, covering a wide rangeof possible types of elements; these are continuously kept up-to-datewith any core changes during the development series.- We believe distributors can safely ship these plug-ins.- People writing elements should base their code on these elements.- These elements come with examples, documentation, and regression tests.- gst-plugins-good: a set of plug-ins that we consider to have good qualitycode, correct functionality, our preferred license (LGPL for the plug-incode, LGPL or LGPL-compatible for the supporting library).- We believe distributors can safely ship these plug-ins.- People writing elements should base their code on these elements.- gst-plugins-ugly: a set of plug-ins that have good quality and correctfunctionality, but distributing them might pose problems. The licenseon either the plug-ins or the supporting libraries might not be how we'dlike. The code might be widely known to present patent problems.- Distributors should check if they want/can ship these plug-ins.- People writing elements should base their code on these elements.- gst-plugins-bad: a set of plug-ins that aren't up to par compared to therest. They might be close to being good quality, but they're missingsomething - be it a good code review, some documentation, a set of tests,a real live maintainer, or some actual wide use.If the blanks are filled in they might be upgraded to become part ofeither gst-plugins-good or gst-plugins-ugly, depending on the other factors.- If the plug-ins break, you can't complain - instead, you can fix theproblem and send us a patch, or bribe someone into fixing them for you.- New contributors can start here for things to work on.PLATFORMS---------- Linux is of course fully supported- FreeBSD is reported to work; other BSDs should work too; same for Solaris- MacOS works, binary 1.x packages can be built using the cerbero build tool- Windows works; binary 1.x packages can be built using the cerbero build tool- MSys/MinGW builds- Microsoft Visual Studio builds are also available and supported- Android works, binary 1.x packages can be built using the cerbero build tool- iOS worksINSTALLING FROM PACKAGES------------------------You should always prefer installing from packages first. GStreamer iswell-maintained for a number of distributions, including Fedora, Debian,Ubuntu, Mandrake, Arch Linux, Gentoo, ...Only in cases where you:- want to hack on GStreamer- want to verify that a bug has been fixed- do not have a sane distributionshould you choose to build from source tarballs or git.Find more information about the various packages athttps://gstreamer.freedesktop.org/download/COMPILING FROM SOURCE TARBALLS------------------------------- again, make sure that you really need to install from source!If GStreamer is one of your first projects ever that you build from source,consider taking on an easier project.- you need a recent version of Meson installed, seehttp://mesonbuild.com/Getting-meson.htmlandhttps://gitlab.freedesktop.org/gstreamer/gst-build/blob/master/README.md- runmeson buildninja -C buildto build GStreamer.- if you want to install it (not required, but what you usually want to do), runninja -C build install- try out a simple test:gst-launch-1.0 -v fakesrc num_buffers=5 ! fakesink(If you didn't install GStreamer, run `./build/tools/gst-launch-1.0`)If it outputs a bunch of messages from fakesrc and fakesink, everything isok.If it did not work, keep in mind that you might need to adjust thePATH and/or LD_LIBRARY_PATH environment variables to make the systemfind GStreamer in the prefix where you installed (by default that is /usr/local).- After this, you're ready to install gst-plugins, which will provide thefunctionality you're probably looking for by now, so go on and readthat README.COMPILING FROM GIT------------------You can build an uninstalled GStreamer from git for development or testingpurposes without affecting your system installation.Get started with:git clone https://gitlab.freedesktop.org/gstreamer/gst-buildmeson buildninja -C buildninja -C build uninstalledFor more information, see the `gst-build` module and its documentation:https://gitlab.freedesktop.org/gstreamer/gst-build/blob/master/README.mdPLUG-IN DEPENDENCIES AND LICENSES---------------------------------GStreamer is developed under the terms of the LGPL (see COPYING file fordetails). Some of our plug-ins however rely on libraries which are availableunder other licenses. This means that if you are distributing an applicationwhich has a non-GPL compatible license (for instance a closed-sourceapplication) with GStreamer, you have to make sure not to distribute GPL-linkedplug-ins.When using GPL-linked plug-ins, GStreamer is for all practical reasonsunder the GPL itself.HISTORY-------The fundamental design comes from the video pipeline at Oregon GraduateInstitute, as well as some ideas from DirectMedia. It's based on plug-ins thatwill provide the various codec and other functionality. The interfacehopefully is generic enough for various companies (ahem, Apple) to releasebinary codecs for Linux, until such time as they get a clue and release thesource.
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