Do you get the issue if you do
$ gst-play-1.0 --videosink="glsinkbin sink=gtkglsink" video.webm (where video.webm is the filename of what you try to play)
Does uninstalling gstreamer1.0-vaapi fixes the issue?
Do you get the issue if you do
$ gst-play-1.0 --videosink= "glsinkbin sink=gtkglsink" video.webm
(where video.webm is the filename of what you try to play)
Does uninstalling gstreamer1.0-vaapi fixes the issue?