How do I compile programs that use GStreamer ? GStreamer uses pkg-config to assist applications with compilationa and linking flags. pkg-config is already used by GTK+, GNOME, SDL, and others; so if you are familiar with using it for any of those, you're set. If you're not familiar with pkg-config to compile and link a small one-file program, pass the --cflags and --libs arguments to pkg-config. For example: $ libtool --mode=link gcc `pkg-config --cflags --libs gstreamer-&GST_MAJORMINOR;` -o myprog myprog.c would be sufficient for a gstreamer-only program. If (for example) your app also used GTK+ 2.0, you could use $ libtool --mode=link gcc `pkg-config --cflags --libs gstreamer-&GST_MAJORMINOR; gtk+-2.0` -o myprog myprog.c Those are back-ticks (on the same key with the tilde on US keyboards), not single quotes. For bigger projects, you should integrate pkg-config use in your Makefile, or integrate with autoconf using the pkg.m4 macro. How do I develop against an uninstalled GStreamer copy ? It is possible to develop and compile against an uninstalled copy of gstreamer and gst-plugins (for example, against CVS copies). The easiest way to do this is to use a script like this (for bash): &gst-uninstalled; If you put this script in your path, and symlink it to gst-cvs (if you want to develop against cvs HEAD) or to gst-0.8 (if you want to develop against the 0.8 branch), it will automatically use the uninstalled version from that directory. This requires you to have put your checkouts of gstreamer and gst-plugins under ~/gst/cvs (for the HEAD version). The program is easily modifiable if this isn't the case. After running this script, you'll be in an environment where you can use the uninstalled tools, and where gst-register registers the uninstalled plugins by default. Also, pkg-config wil detect the uninstalled copies before any installed copies. How can I use GConf to get the system-wide defaults ? For GNOME applications it's a good idea to use GConf to find the default ways of outputting audio and video. You can do this by using the 'gconfaudiosink' and 'gconfvideosink' elements for audio and video output. They will take care of everything GConf-related for you and automatically use the outputs that the user configured. How do I debug these funny shell scripts that libtool makes ? When you link a program against uninstalled GStreamer using libtool, funny shell scripts are made to modify your shared object search path and then run your program. For instance, to debug gst-launch, try libtool --mode=execute gdb /path/to/gst-launch . If this does not work, you're probably using a broken version of libtool. Why is mail traffic so low on gstreamer-devel ? Our main arena for coordination and discussion is IRC, not email. Join us in #gstreamer on irc.freenode.net For larger picture questions or getting more input from more persons, a mail to gstreamer-devel is never a bad idea. What kind of versioning scheme does GStreamer use ? For public releases, GStreamer uses a standard MAJOR.MINOR.MICRO version scheme. If the release consists of mostly bug fixes or incremental changes, the MICRO version is incremented. If the release contains big changes, the MINOR version is incremented. If we're particularly giddy, we might even increase the MAJOR number. Don't hold your breath for that though. During the development cycle, GStreamer also uses a fourth or NANO number. If this number is 1, then it's a CVS version. Any tarball or package that has a nano number of 1 is made from CVS and thus not supported. Additionally, if you didn't get this package or tarball from the GStreamer team, don't have high hopes on it doing whatever you want it to do. If the number is 2 or higher, it's an official pre-release in preparation of an actual complete release. Your help in testing these tarballs and packages is very much appreciated. What is the coding style for GStreamer core ? The core is basically coded in K&R with 2-space indenting. Just follow what's already there and you'll be fine. The core could use a code cleanup though at this point. Individual plugins in gst-plugins or plugins that you want considered for addition to the gst-plugins module should be coded in the same style. It's easier if everything is consistent. Consistency is, of course, the goal. If you use emacs, try these lines: (defun gstreamer-c-mode () "C mode with adjusted defaults for use with GStreamer." (interactive) (c-mode) (c-set-style "K&R") (setq c-basic-offset 2)) (setq auto-mode-alist (cons '("gst.*/.*\\.[ch]$" . gstreamer-c-mode) auto-mode-alist)) Or, run your code through indent -br -bad -cbi0 -cli2 -bls -l100 -ut -ce before submitting a patch (FIXME: check if these are indeed the proper options). As for the code itself, the GNOME coding guidelines is a good read. Where possible, we try to adhere to the spirit of GObject and use similar coding idioms. Patches should be made against CVS or the latest release and should be in 'unified context' format (use diff -u -p). They should be attached to a bug report (or feature request) in bugzilla rather than sent to the mailing list. I have translated one of the module .po files into a new language. How do I get it into CVS? GStreamer translations are uniformly managed through the Translation Project (http://translationproject.org). There are some instructions on how to join the Translation Project team and submit new translations at http://translationproject.org/html/translators.html. New translations submitted via the Translation Project are merged periodically into CVS by the maintainers by running 'make download-po' in the various modules.