Problem also with cheese ... may be related?
corrado@corrado-p5-0930:~$ cheese (cheese:4054): Gtk-WARNING **: Theme parsing error: cheese.css:7:35: The style property GtkScrollbar:min-slider-length is deprecated and shouldn't be used anymore. It will be removed in a future version totem-video-thumbnailer couldn't open file 'file:///home/corrado/Videos/Webcam/2017-10-05-140813.webm' ** (cheese:4054): WARNING **: could not generate thumbnail for /home/corrado/Videos/Webcam/2017-10-05-140813.webm (video/webm) corrado@corrado-p5-0930:~$ corrado@corrado-p5-0930:~$ totem (totem:4344): GLib-CRITICAL **: g_key_file_load_from_file: assertion 'file != NULL' failed (totem:4344): Gtk-WARNING **: Drawing a gadget with negative dimensions. Did you forget to allocate a size? (node slider owner GtkScale) ** (totem:4344): WARNING **: Could not take screenshot: failed to retrieve or convert video frame corrado@corrado-p5-0930:~$ -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1721248 Title: Totem could not get a screenshot of the video To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/totem/+bug/1721248/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs