Bug 441662

Summary: Spacer tool lag while moving several tracks
Product: [Applications] kdenlive Reporter: Mehdi H. <powergame_coder2>
Component: Rendering & ExportAssignee: Jean-Baptiste Mardelle <jb>
Status: RESOLVED DUPLICATE    
Severity: normal CC: fritzibaby, julius.kuenzel
Priority: NOR Flags: fritzibaby: Brainstorm+
Version: git-master   
Target Milestone: ---   
Platform: Appimage   
OS: Linux   
Latest Commit: Version Fixed In:
Sentry Crash Report:

Description Mehdi H. 2021-08-28 16:46:37 UTC 
SUMMARY

When moving several tracks at the same time, especially in large projects, the operation has a lag of several seconds, while the app is unresponsive and then, the tracks are shown at the new location on the timeline, to which the drag occurred.   




STEPS TO REPRODUCE
1. Fill in several tracks with media for the length of about 2 hours
2. Trim a section in about the middle of the tracks, with trim points on top of each other
3. Select Spacer tool from toolbar or press M and then drag the beginning of one of the tracks and try pushing it forward. You'll notice the lag. 

OBSERVED RESULT

You'll see the lag while dragging multiple tracks. 
EXPECTED RESULT


SOFTWARE/OS VERSIONS
Windows: 
macOS: 
Linux/KDE Plasma:  Fedora 34
(available in About System)
KDE Plasma Version: 
KDE Frameworks Version: 
Qt Version: 

ADDITIONAL INFORMATION
Kdenlive AppImage 21.11.70
Comment 1 emohr 2021-08-29 10:30:54 UTC 
Thank you for reporting. I guess you tested it with nightly build from 25.Aug.2021. The root cause of the performance issue with spacer is not found so far. See here where we track it: https://invent.kde.org/multimedia/kdenlive/-/issues/963
Comment 2 Julius Künzel 2021-10-05 18:08:39 UTC 

*** This bug has been marked as a duplicate of bug 414006 ***