Confirmed the problem is the gstreamer-clutter plugin (which only totem seems to use by default). You can see the same problem here:
High CPU: gst-launch-1.0 filesrc location=bbb_sunflower_1080p_60fps_normal.mp4 ! qtdemux ! vaapidecodebin ! clutterautovideosink Low CPU: gst-launch-1.0 filesrc location=bbb_sunflower_1080p_60fps_normal.mp4 ! qtdemux ! vaapidecodebin ! glimagesink ** Package changed: totem (Ubuntu) => clutter-gst-3.0 (Ubuntu) -- You received this bug notification because you are a member of Ubuntu Desktop Bugs, which is subscribed to totem in Ubuntu. https://bugs.launchpad.net/bugs/1698282 Title: Totem uses dramatically higher CPU than any other video player To manage notifications about this bug go to: https://bugs.launchpad.net/totem/+bug/1698282/+subscriptions -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs
