Thanks for your help on this. Those videos do play if gstreamer*bad is not installed, but if it is installed, then they do not play:
---> % LC_ALL=C gst-play-1.0 edge-scroll.webm Press 'k' to see a list of keyboard shortcuts. Now playing /tmp/edge-scroll.webm ERROR Internal data stream error. for file:///tmp/edge-scroll.webm ERROR debug information: ../gst/matroska/matroska-demux.c(6115): gst_matroska_demux_loop (): /GstPlayBin3:playbin/GstURIDecodeBin3:uridecodebin3/GstURISourceBin:urisourcebin0/GstParseBin:parsebin0/GstMatroskaDemux:matroskademux0: streaming stopped, reason not-negotiated (-4) Reached end of play list. % sudo apt remove gstreamer*bad ... % LC_ALL=C gst-play-1.0 edge-scroll.webm #Plays fine despite the error message Press 'k' to see a list of keyboard shortcuts. Now playing /tmp/edge-scroll.webm Redistribute latency... ERROR Output window was closed for file:///tmp/edge-scroll.webm ERROR debug information: ../sys/xvimage/xvimagesink.c(586): gst_xv_image_sink_handle_xevents (): /GstPlayBin3:playbin/GstPlaySink:playsink/GstBin:vbin/GstAutoVideoSink:videosink/GstXvImageSink:videosink-actual-sink-xvimage Reached end of play list. <--- -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to gnome-control-center in Ubuntu. https://bugs.launchpad.net/bugs/2077117 Title: settings - mouse&touchpad - scroll direction images empty Status in gnome-control-center package in Ubuntu: New Status in gtk4 package in Ubuntu: In Progress Bug description: Settings - mouse&touchpad - scroll direction images empty see attached screenshot ProblemType: Bug DistroRelease: Ubuntu 24.10 Package: gnome-control-center 1:47~beta-2ubuntu1 ProcVersionSignature: Ubuntu 6.8.0-31.31-generic 6.8.1 Uname: Linux 6.8.0-31-generic x86_64 ApportVersion: 2.30.0-0ubuntu1 Architecture: amd64 CasperMD5CheckResult: pass CurrentDesktop: ubuntu:GNOME Date: Thu Aug 15 20:39:33 2024 InstallationDate: Installed on 2024-08-10 (5 days ago) InstallationMedia: Ubuntu 24.10 "Oracular Oriole" - Daily amd64 (20240810) ProcEnviron: LANG=en_US.UTF-8 PATH=(custom, no user) SHELL=/bin/bash TERM=xterm-256color XDG_RUNTIME_DIR=<set> SourcePackage: gnome-control-center UpgradeStatus: No upgrade log present (probably fresh install) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-control-center/+bug/2077117/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp