I don't think this would be a regression. I don't think we've never been allowed to ship the required components for DVD video payback, which implies that it probably never worked out of the box in previous releases either. And it seems the instructions for how to get it working have changed over the years so I don't know what works right now...
Please also try: sudo apt install ubuntu-restricted-extras sudo apt install libdvd-pkg ** Changed in: gstreamer1.0 (Ubuntu) Status: Incomplete => New ** Changed in: totem (Ubuntu) Status: Incomplete => New -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to gstreamer1.0 in Ubuntu. https://bugs.launchpad.net/bugs/1809044 Title: DVD playback error: unable to play . . . DVD source is required . . . Status in gstreamer1.0 package in Ubuntu: New Status in totem package in Ubuntu: New Bug description: Successful installation of libdvd-pkg and dpkg-reconfigure, afterwards, to complete compilation. Inserted known-good DVD and clicked on "Open in Videos" which launched the Totem player. Error msg: "Unable to play the file, DVD source is required, but is not installed." DVD will play normally in VLC player after installation on same machine. ProblemType: Bug DistroRelease: Ubuntu 18.10 Package: libgstreamer1.0-0 1.14.4-1 ProcVersionSignature: Ubuntu 4.18.0-12.13-generic 4.18.17 Uname: Linux 4.18.0-12-generic x86_64 ApportVersion: 2.20.10-0ubuntu13.1 Architecture: amd64 CurrentDesktop: ubuntu:GNOME Date: Tue Dec 18 15:21:45 2018 InstallationDate: Installed on 2018-11-13 (34 days ago) InstallationMedia: Ubuntu 18.10 "Cosmic Cuttlefish" - Release amd64 (20181017.3) ProcEnviron: TERM=xterm-256color PATH=(custom, no user) XDG_RUNTIME_DIR=<set> LANG=en_US.UTF-8 SHELL=/bin/bash SourcePackage: gstreamer1.0 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/gstreamer1.0/+bug/1809044/+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