OK, I digged a bit more and I found out how thumbnails get generated. The thumbnailer registered for the files (or at least some that I tried) is "/usr/bin/gnome-video-thumbnailer -s %s %u %o", which looks OK. I tried running it by hand with
/usr/bin/gnome-video-thumbnailer -s 128 '/media/testfile.avi' output.png (which seems to be the correct way) and I got ************ (process:21395): GStreamer-WARNING **: The GStreamer function gst_init_get_option_group() was called, but the GLib threading system has not been initialised yet, something that must happen before any other GLib function is called. The application needs to be fixed accordingly, please file a bug against this application. GThread-ERROR **: GThread system may only be initialized once. aborting... Aborted (core dumped) ************ If you need the core dump, please tell me where I can find it, I never knew where they are placed. ** Summary changed: - video thumbnails no longer work + gnome-video-thumbnailer started to crash -- gnome-video-thumbnailer started to crash https://launchpad.net/bugs/80758 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs