https://bugs.kde.org/show_bug.cgi?id=486578
Bug ID: 486578
Summary: Moving the cursor when screen-sharing causes the
stream to drop frames, stutter and skip back and forth
from the previous frames
Classification: Plasma
Product: kwin
Version: unspecified
Platform: Other
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: core
Assignee: kwin-bugs-n...@kde.org
Reporter: sophisticatedbystan...@proton.me
Target Milestone: ---
SUMMARY:
Moving the cursor when screen-sharing causes the stream to drop frame-rate, and
stutter a lot, and it seems that it stutters back and forth with a previous
frame. I was able to recreate this same issue with chromium based
browsers/applications as well as non chromium ones, eg. firefox,
discord-screenaudio (this app does not use electron), etc. And to rule out an
issue with the services, i tried it on various services where i can screen
share, discord, jitsi meet, signal, matrix/element and was able to notice the
same issue. One noticeable thing was that this does not happen with something
like obs, regardless if i stream or record and the same is with spectacle if i
record with that. And this stutter happens regardless if a particular
window/game is selected or the entire screen is being shared. Another thing,
that i noticed was that, in games that disable cursor, for e.g any fps games,
DOOM, Apex legends, the stream does not stutter when moving the mouse, but in
the menu of these games, when i move the cursor it stutters. And i tried the
same on Gnome wayland, with all the latest packages, and im not able to
replicate this issue.
STEPS TO REPRODUCE
1. Start a screen-share
2. Move your cursor
3. Observe it from the other end
OBSERVED RESULT
The observer of the stream on the other end can see that the stream stutters
when the cursor is being moved
EXPECTED RESULT
The stream should be smooth and should not stutter
SOFTWARE/OS VERSIONS
Windows: -
macOS: -
Linux/KDE Plasma: Arch Linux, latest packages
(available in About System)
KDE Plasma Version: 6.0.4
KDE Frameworks Version: 6.1.0
Qt Version: 6.7.0
ADDITIONAL INFORMATION :
Similar is also experienced by others that are not on wayland but on X11 on
Plasma, as mentioned in this Github issue here.
https://github.com/Vencord/Vesktop/issues/545
As i cannot upload large files here, im attaching the link to the video files
uploaded on peertube
This is the video where we can see the stutter when the cursor is being moved
on the bottom of the video, KDE Plasma
https://peertube.otakufarms.com/w/2zhTZAddhGrGYxKF8bCeMM
This is on GNOME and we do not see any stutters when moving the cursor
https://peertube.otakufarms.com/w/hQGVJhQthJXjohahAP7unw
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