GStreamer is developed under the terms of the LGPL (see LICENSE file for details). Some of our plugins however rely on libraries which are available under i other licenses. This means that if you are using an applications which has a non-GPL compatible license, for instance a closed-source application with GStreamer you have to make sure not to use GPL linked plugins. When using GPL linked plugins GStreamer is for all practical reasons under the GPL itself. The plugins which use a GPL library are as follows: cdparanoia libcdparanoia (http://www.xiph.org/paranoia/) aasink aalib (http://aa-project.sourceforge.net/aalib/) xmms libxmms (http://www.xmms.org) decdvd ac3dec,mpeg2dec (http://linuxvideo.org/mpeg2dec/,http://linuxvideo.org/ac3dec/)a Plugins which use library a LGPL are as follows: Colorspace Hermes (http://www.clanlib.org/hermes/) httpsrc libghttp (ftp.gnome.org/pub/GNOME/stable/sources/libghttp/) alsasink alsa (http://alsa-project.org) aRts aRts (http://arts-project.org) sdlsink libsdl (http://www.libsdl.org) gnomevfssource gnome-vfs (ftp.gnome.org//pub/GNOME/stable/sources/gnome-vfs) gnomevfssink gnome-vfs esdsink libesd (ftp.gnome.org/pub/GNOME/stable/sources/esound) icastsend libshout (http://www.icecast.org) lame libmp3lame (http://www.mp3dev.org/mp3/) gst1394 libraw1394 (http://linux1394.sourceforge.net) flac libFLAC (http://flac.sourceforge.net) RTP ortp (http://www.linphone.org/ortp/) Plugins which use a BSD covered library are as follows: vorbisenc libogg/libvorbis (http://www.xiph.org/ogg/vorbis) vorbisdec libogg/libvorbis Plugins based on libraries with other free licenses: xsink libXv (MIT X11 / X Consortium license) gsm libgsm (MIT license http://kbs.cs.tu-berlin.de/~jutta/toast.html) Plugins using non-free libraries: xamp3 decoder libxaudio (http://www.xaudio.com/) wincodec win32ddl (http://divx.euro.ru/)