There is no need to query the frontend for the list of supported delivery systems if we are selecting one from the list of autodetected ones.
Gstreamer DVB Source GstDvbSrc makes it possible to view Digital TV with gstreamer. Try: gst-launch-1.0 dvbsrc frequency=11954 polarity=h symbol-rate=27500 pids=210:220 ! mpegtsdemux es-pids=210:220 name=demux ! queue ! mpeg2dec ! xvimagesink demux. ! queue ! mad ! audioconvert ! autoaudiosink to view the German 3Sat telestation from the Astra 1 19.2E satellite. DVB-C is untested, feedback is welcomed. gstdvbtv is not yet ported to 0.10