This is Tumbleweed 20160925 with gnome-shell 3.22 (but I had the same problem
with gnome-shell 3.20).


When starting gnome-shell recording and after some seconds stop it, the
resulting file has 0 bytes and no recording is available. The log output is:

Sep 27 16:11:50 basilikum org.gnome.Shell.desktop[2613]: Recording to
/home/tom/Videos/Screencast from 27.09.2016 16:11:50.webm
Sep 27 16:11:50 basilikum gnome-shell[2613]: Error in recording pipeline:
Internal data flow error.
Sep 27 16:11:50 basilikum gnome-shell[2613]: recorder_record_frame: assertion
'recorder->current_pipeline != NULL' failed
Sep 27 16:11:54 basilikum gnome-shell[2613]: shell_recorder_close: assertion
'recorder->state != RECORDER_STATE_CLOSED' failed