<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd"><html xmlns="http://www.w3.org/1999/xhtml"> <head> <meta content="text/html; charset=UTF-8" http-equiv="Content-Type"/> </head> <body> Hi,   I'm trying to find out more about the media controller subsystem described here: http://lwn.net/Articles/415714/ . I see that the patch set described has been merged into the kernel by now, but I'm trying to find out about the level of support in userland. Does anyone know anything about the gstreamer source element the article describes and what its current status is?   Thanks for your help.   Best Regards Joel Holdsworth  </body> </html>