Now looking into issue 3 from comment #11 again. Every time the big stutter occurs it coincides with my PC's harddisk LED. Also, the same place in the video seems to be the first time the stream bitrate peaks over 10Mbps. So there seems to be some kind of cause and effect at this particularly detailed part of the video.
The stutter only occurs in totem though. No other gstreamer tool seems to exhibit the problem when playing the same video. Even using "gst- launch-1.0 playbin uri=file:///...." seems to not have the problem. So all evidence at the moment is suggesting the biggest stutter is somehow specific to the totem binary, and not gstreamer in general. I've also just noticed a 5th source of stuttering; that is using clutterautovideosink in an X11 session. Will ignore that problem for now... ** Changed in: totem (Ubuntu) Status: Fix Released => In Progress -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to gtk+3.0 in Ubuntu. https://bugs.launchpad.net/bugs/1698270 Title: Totem pauses and stutters during video playback even when CPU usage is low Status in GTK+: Confirmed Status in Totem: Incomplete Status in clutter-1.0 package in Ubuntu: Won't Fix Status in clutter-gtk package in Ubuntu: In Progress Status in gstreamer package in Ubuntu: In Progress Status in gtk+3.0 package in Ubuntu: In Progress Status in totem package in Ubuntu: In Progress Bug description: Totem pauses and stutters during video playback even when CPU usage is low. After figuring out how to play videos with full hardware accelerated decoding (e.g. <= 10% CPU), I was surprised to find Totem still pauses and stutters during playback. Other apps like Mplayer, VLC and even gst-play-1.0 never have this problem. ProblemType: Bug DistroRelease: Ubuntu 17.10 Package: totem 3.24.0-0ubuntu1 ProcVersionSignature: Ubuntu 4.10.0-22.24-generic 4.10.15 Uname: Linux 4.10.0-22-generic x86_64 ApportVersion: 2.20.5-0ubuntu4 Architecture: amd64 Date: Fri Jun 16 12:03:18 2017 InstallationDate: Installed on 2017-05-03 (44 days ago) InstallationMedia: Ubuntu 17.10 "Artful Aardvark" - Alpha amd64 (20170502) SourcePackage: totem UpgradeStatus: No upgrade log present (probably fresh install) To manage notifications about this bug go to: https://bugs.launchpad.net/gtk/+bug/1698270/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp