Bug 420582

Summary:	Performance of project monitor
Product:	[Applications] kdenlive	Reporter:	Valentine <elventian>
Component:	Rendering & Export	Assignee:	Jean-Baptiste Mardelle <jb>
Status:	RESOLVED WORKSFORME
Severity:	normal	CC:	fritzibaby, julius.kuenzel
Priority:	NOR	Flags:	fritzibaby: timeline_corruption+
Version First Reported In:	20.04.0
Target Milestone:	---
Platform:	Debian stable
OS:	Linux
Latest Commit:		Version Fixed/Implemented In:
Sentry Crash Report:

Description Valentine 2020-04-25 18:49:02 UTC

SUMMARY
When playhead moves to end of visible area of timeline, video in project monitor becomes laggy

STEPS TO REPRODUCE
1. Put any video on timeline
2. Zoom in (level 18+)
3. Press Space to play

OBSERVED RESULT
When playhead is moved to end of visible area, timeline starts to update, and video in project monitor becomes laggy

EXPECTED RESULT
Timeline update shouldn't affect performance of Project Monitor

SOFTWARE/OS VERSIONS
appimage kdenlive-20.04.0-x86_64 on Debian Stable

ADDITIONAL INFORMATION
It's new behavior, no such problems on appimage kdenlive-19.12.3-x86_64

Comment 1 emohr 2020-04-28 18:26:27 UTC

Tested with a 1080p50fps file. Zoomed in to +18. Preview set to 720p and 540p. No playback lag. 
Please test with a lower timeline preview.

Comment 2 Julius Künzel 2021-04-23 22:49:41 UTC

Can you please provide the information requested above? Please test also if this still occurs with the latest version (https://kdenlive.org/en/download/) because there have been some improvements for playback in the meanwhile…

Comment 3 Bug Janitor Service 2021-05-08 04:33:32 UTC

Dear Bug Submitter,

This bug has been in NEEDSINFO status with no change for at least
15 days. Please provide the requested information as soon as
possible and set the bug status as REPORTED. Due to regular bug
tracker maintenance, if the bug is still in NEEDSINFO status with
no change in 30 days the bug will be closed as RESOLVED > WORKSFORME
due to lack of needed information.

For more information about our bug triaging procedures please read the
wiki located here:
https://community.kde.org/Guidelines_and_HOWTOs/Bug_triaging

If you have already provided the requested information, please
mark the bug as REPORTED so that the KDE team knows that the bug is
ready to be confirmed.

Thank you for helping us make KDE software even better for everyone!

Comment 4 Bug Janitor Service 2021-05-23 04:33:48 UTC

This bug has been in NEEDSINFO status with no change for at least
30 days. The bug is now closed as RESOLVED > WORKSFORME
due to lack of needed information.

For more information about our bug triaging procedures please read the
wiki located here:
https://community.kde.org/Guidelines_and_HOWTOs/Bug_triaging

Thank you for helping us make KDE software even better for everyone!