https://bugs.kde.org/show_bug.cgi?id=491628
Bug ID: 491628
Summary: Stuttery/Very low FPS timeline playback on clips with
zero effects
Classification: Applications
Product: kdenlive
Version: 24.05.2
Platform: Debian unstable
OS: Linux
Status: REPORTED
Severity: major
Priority: NOR
Component: Video Display & Export
Assignee: j...@kdenlive.org
Reporter: xanqz5...@outlook.com
Target Milestone: ---
SUMMARY
Playback is extremely laggy and stuttery on videos of all kinds with kdenlive.
On Shotcut or Openshot playback is very smooth even with a few effects thrown
in and no proxies.
STEPS TO REPRODUCE
1. Add a clip on the timeline
2. Click Play
OBSERVED RESULT
Very low FPS.
EXPECTED RESULT
At least 30 FPS for 30 FPS videos or 60 FPS for 60 FPS videos.
SOFTWARE/OS VERSIONS
(available in the Info Center app, or by running `kinfo` in a terminal window)
Linux/KDE Plasma: Debian GNU/Linux 12 unstable
KDE Plasma Version: 5.27.11
KDE Frameworks Version: 5.115.0
Qt Version: 5.15.13
ADDITIONAL INFORMATION
Igpu: Mesa Intel® UHD Graphics 600
Cpu: 4 × Intel® Celeron® N4120 CPU @ 1.10GHz
Memory: 3.6 GiB of RAM
It happens on 720p videos, 480p videos, doesn't matter.
There is high CPU usage, some GPU usage, and 2GB+ RAM usage, but playback is
still not smooth. I am not swapping nor running out of memory.
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