gst-launch-1.0 --eos-on-shutdown ximagesrc display-name = ":1" use-damage=1 show-pointer=true ! video/x-raw,framerate=30/1 ! queue ! videoscale ! videoconvert ! vp8enc min_quantizer=20 max_quantizer=20 cpu-used=2 deadline=1000000 threads=2 ! queue ! matroskamux name=mux ! queue ! filesink location='test'.mkv