SUMMARY When pausing a video playback the paused video can turn black, instead of showing latest video frame. This is demonstrated in dolphin with patch https://phabricator.kde.org/D22183 but not in dragonplayer. Resizing the window or moving the mouse around can make the last frame appear for an instant. STEPS TO REPRODUCE 1. build dolphin with patch https://phabricator.kde.org/D22183 2. Preview a video 3. Click on the video playing OBSERVED RESULT The video is paused, the video output is black. EXPECTED RESULT The video is paused, last video frame is visible. SOFTWARE/OS VERSIONS Operating System: Kubuntu 19.04 KDE Plasma Version: 5.16.80 KDE Frameworks Version: 5.60.0 Qt Version: 5.12.2 Kernel Version: 5.0.0-20-generic ADDITIONAL INFORMATION
I can reproduce. Looks like a bug in the default X11 renderer
Git commit ff1f48bda6d21aa4dbda76c87ba8a1e7ab4b64e2 by Daniel Vrátil. Committed on 04/07/2019 at 12:03. Pushed by dvratil into branch '4.9'. X11Renderer: don't blank overlay on pause Summary: FIXED-IN: 4.9.1 Test Plan: Tested with Dolphin with patch D22050 applied, pausing a video preview in Info pane by clicking on it no longer blanks the video widget. Reviewers: O4 phonon, sitter Reviewed By: O4 phonon, sitter Differential Revision: https://phabricator.kde.org/D22254 M +6 -4 gstreamer/x11renderer.cpp M +1 -1 gstreamer/x11renderer.h https://commits.kde.org/phonon-gstreamer/ff1f48bda6d21aa4dbda76c87ba8a1e7ab4b64e2