Bug 414770

Summary:	High CPU load with ~25% when playing a video
Product:	[Applications] gwenview	Reporter:	postix <postix>
Component:	general	Assignee:	Gwenview Bugs <gwenview-bugs-null>
Status:	RESOLVED WORKSFORME
Severity:	normal	CC:	justin.zobel, postix
Priority:	NOR
Version First Reported In:	19.08.3
Target Milestone:	---
Platform:	Other
OS:	Linux
Latest Commit:		Version Fixed/Implemented In:
Sentry Crash Report:

Description postix 2019-12-02 21:46:40 UTC

SUMMARY

Playing an MPEG-4-Video with ~3 Mbits/s and 25 fps, my CPU (2+2 cores) load goes to ~20-25% and the fans start whirring.

This does not happen if the video is played with the VLC player or 4k video is watched on the web. Gwenview could surely need some performance improvements for simple video playback! :)


SOFTWARE/OS VERSIONS
Operating System: Manjaro Linux 
KDE Plasma Version: 5.17.3
KDE Frameworks Version: 5.65.0
Qt Version: 5.13.2
Kernel Version: 5.4.1-2-MANJARO
OS Type: 64-bit
Processors: 4 × Intel® Core™ i7-7500U CPU @ 2.70GHz
Memory: 15,4 GiB

Comment 1 Justin Zobel 2020-11-20 04:53:03 UTC

Are you able to upload the video so we have the same content for testing.

Comment 2 postix 2020-11-20 10:19:37 UTC

(In reply to Justin Zobel from comment #1)
> Are you able to upload the video so we have the same content for testing.

I don't remember which video it was and the two I tested now produced similar loads as they'd do in VLC (a little bit higher though).

Anyway, since I could disable the auto playback, I am no longer much interested in gwenview's "video capabilities". :)