same issue here. removing gstreamer1.0-vaapi solved it for Quicktime MPEG4-AAC files produced by iPhone.
I was getting the same error: (totem:3619317): GStreamer-CRITICAL **: 22:44:02.296: gst_buffer_get_meta: assertion 'buffer != NULL' failed -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to totem in Ubuntu. https://bugs.launchpad.net/bugs/1969767 Title: totem crashes when attempting to play mp4 files [gst_buffer_get_meta: assertion 'buffer != NULL' failed] Status in totem package in Ubuntu: Confirmed Bug description: I can add and display a directory of .mp4 files in totem but when attempting to play any of them totem will crash. An attempt to restart totem fail with the window not appearing at all. After several further attempts to restart totem I find that I can add an .mp4 file but any attempt to play it results in sometimes the totem window not appearing at all, sometimes totem starts and I can navigate to a local file and sometimes I see the error "The specified move could not be found" as soon as totem's window is displayed. In other words, the result of attempting to play an .mp4 file is unpredictable after the initial crash. These reports have appeared on errors.ubuntu.com which relate to the most recent crashes: https://errors.ubuntu.com/oops/383cc642-c157-11ec-8afa-fa163e993415 https://errors.ubuntu.com/oops/37f3e83a-c157-11ec-a3c9-fa163ef35206 ProblemType: Bug DistroRelease: Ubuntu 22.04 Package: totem 42.0-1ubuntu1 ProcVersionSignature: Ubuntu 5.15.0-25.25-generic 5.15.30 Uname: Linux 5.15.0-25-generic x86_64 ApportVersion: 2.20.11-0ubuntu82 Architecture: amd64 CasperMD5CheckResult: pass CurrentDesktop: ubuntu:GNOME Date: Thu Apr 21 10:53:17 2022 InstallationDate: Installed on 2022-04-02 (18 days ago) InstallationMedia: Ubuntu 22.04 LTS "Jammy Jellyfish" - Daily amd64 (20220402) SourcePackage: totem UpgradeStatus: No upgrade log present (probably fresh install) XorgLog: Error: [Errno 2] No such file or directory: '/var/log/Xorg.0.log' To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/totem/+bug/1969767/+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
