https://bugs.kde.org/show_bug.cgi?id=435793
Bug ID: 435793
Summary: 100% CPU usage when playing 4K clip that VLC plays at
15% CPU
Product: kdenlive
Version: 20.12.3
Platform: Appimage
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: Video Display & Export
Assignee: j...@kdenlive.org
Reporter: ddascalescu+...@gmail.com
Target Milestone: ---
Created attachment 137646
--> https://bugs.kde.org/attachment.cgi?id=137646&action=edit
CPU usage
When I play 4K clips in Kdenlive like this one[1], CPU utilization goes to 100%
on all 8 cores. Changing the preview resolution to 270p doesn't help at all.
My laptop is a ThinkPad X1C with 16GB RAM and Mesa Intel UHD Graphics 620.
I’m using KDE Neon 5.21.4 on X11. The Configuration wizard says "no hardware
encoders found" and "Using MLT 6.25.0".
VLC plays the same clips at under 15% CPU utilization.
My goal is to scrub rapidly through clips, but dragging the playhead takes ~2
seconds to seek.
[1]:
https://drive.google.com/file/d/1WZsD2bXUJvvCMYVKSbuID539y4WVZ4NZ/view?usp=sharing
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