Bug 424582

Summary: When inverting a clip speed, the clip is one frame off in comparison to the normal speed.
Product: [Applications] kdenlive Reporter: Fernando M. Muniz <fernandommuniz>
Component: Video Effects & TransitionsAssignee: Vincent PINON <vpinon>
Status: RESOLVED DUPLICATE    
Severity: minor CC: snd.noise
Priority: NOR    
Version First Reported In: 24.08.1   
Target Milestone: ---   
Platform: Arch Linux   
OS: Linux   
Latest Commit: https://invent.kde.org/multimedia/kdenlive/commit/78f4cfea4db89c72082c26226ad4407927788c1a Version Fixed/Implemented In:
Sentry Crash Report:

Description Fernando M. Muniz 2020-07-23 20:40:25 UTC 
SUMMARY


STEPS TO REPRODUCE
1. Place any video clip in the editing timeline
2. Make a copy and put next to it
3. Invert the speed of the copy in order to make a loop

OBSERVED RESULT
The copy with the inverted speed is one frame off, making the loop stutter when  you watch the rendered video

EXPECTED RESULT
A smooth loop

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

ADDITIONAL INFORMATION
Comment 1 Jean-Baptiste Mardelle 2021-04-13 07:13:08 UTC 
Git commit 78f4cfea4db89c72082c26226ad4407927788c1a by Jean-Baptiste Mardelle.
Committed on 13/04/2021 at 07:12.
Pushed by mardelle into branch 'release/21.04'.

Fix in point calculation on speed revert.

M  +2    -3    src/timeline2/model/clipmodel.cpp

https://invent.kde.org/multimedia/kdenlive/commit/78f4cfea4db89c72082c26226ad4407927788c1a
Comment 2 Fernando M. Muniz 2024-09-19 16:07:20 UTC 
Reopened because this issue still happens on 24.08.1
Comment 3 Fernando M. Muniz 2024-09-19 16:32:26 UTC 
It's very easy to notice when getting a video cut into a specific scene, then inverting the scene.
You'll notice that the final frames of the previous scene will appear in the cut.
Comment 4 Fernando M. Muniz 2024-09-19 16:35:04 UTC 

*** This bug has been marked as a duplicate of bug 455504 ***