I suspect this is due to hardware acceleration (gstreamer-vaapi). We try to avoid buffer copies for the best efficiency, but that also means getting a screenshot is very difficult. The video image only exists in GPU memory and requires a lot of effort to read back. It's not surprising this doesn't quite work yet.
Similarly using Alt+PrtScn may fail to get a screenshot (without an error message). I think the reason for that is the use of wl_subsurface is something gnome-shell doesn't quite know how to screenshot yet(?) ** Changed in: totem (Ubuntu) Importance: Undecided => Low -- 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/1721248 Title: Totem could not get a screenshot of the video Status in totem package in Ubuntu: New Bug description: I try to get a screenshot from my video and totem shows a message saying it could not get a screenshot of the video and suggesting to open a bug. See attached screenshot. ProblemType: Bug DistroRelease: Ubuntu 17.10 Package: totem 3.25.90.1-0ubuntu3 ProcVersionSignature: Ubuntu 4.13.0-12.13-generic 4.13.3 Uname: Linux 4.13.0-12-generic x86_64 ApportVersion: 2.20.7-0ubuntu2 Architecture: amd64 CurrentDesktop: ubuntu:GNOME Date: Wed Oct 4 14:54:16 2017 InstallationDate: Installed on 2017-09-29 (5 days ago) InstallationMedia: Ubuntu 17.10 "Artful Aardvark" - Alpha amd64 (20170926) 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/1721248/+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
