Bug 462404 - Certain Effects (Exposure, Vibrance, etc) effect file clips (Project Bin) vs timeline clips vs master track differently.
Summary: Certain Effects (Exposure, Vibrance, etc) effect file clips (Project Bin) vs ...
Status: CONFIRMED
Alias: None
Product: kdenlive
Classification: Applications
Component: Video Effects & Transitions (show other bugs)
Version: 22.08.3
Platform: Microsoft Windows Microsoft Windows
: NOR normal
Target Milestone: ---
Assignee: Vincent PINON
URL:
Keywords:
Depends on:
Blocks:
 
Reported: 2022-11-29 19:13 UTC by Ziflin
Modified: 2022-12-21 01:12 UTC (History)
1 user (show)

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Description Ziflin 2022-11-29 19:13:34 UTC
SUMMARY

When applying an effect such as Exposure or Vibrance to a file in the Project Bin, the rendered output in the Clip Monitor changes considerably (orange and red colors are most noticeably changed) despite using default effect values. However, the view in the Project Monitor window appears to be correct if the clip is added to the timeline. This makes it difficult to properly configure file clip effects using just the Clip Monitor.

Likely related is that if an Exposure effect is applied to the Master track, the Project Monitor output will then brighten/change (similar to how the Clip Monitor changed above).  If a default Exposure effect is applied to an individual track, it behaves correctly and there is no visible change in the Project Monitor output.

STEPS TO REPRODUCE
1.  Create a new project and add a video (or likely an image) clip (one with mid-value oranges or reds makes it more noticeable).
2.  Select the new clip and note the orange/red colors in the Clip Monitor.
3.  Drag/drop an Exposure effect onto the clip in the Project Bin and note the change in colors though the effect's values are at their default. The 'Disable Effect' (Eye Button) in the Effect/Composition Stack can be toggled to see the difference.

4. Remove the Exposure effect from the file.
5. Drag the clip into the the timeline and view it in the Project Monitor.
6. Drag and Drop an Exposure effect to the new clip in the timeline. Note that there is *no* visible change when applied (as expected).

7. Remove the Exposure effect from the clip in the timeline.
8. Drag and Drop an Exposure effect to the Master track. Note that the colors in the Project Monitor now change though they should not.

And just to verify that individual Track-level effects *do* work properly:

9. Remove the clip from the master track.
10. Drag and Drop an Exposure effect to the track containing the clip. Note that no change with the default exposure values occurs (as expected).

OBSERVED RESULT
* Certain effects sometimes change the output in the Clip Monitor or Project Monitor despite using the same default values.

EXPECTED RESULT
* Applying an effect to files vs. timeline clips vs. master track vs. individual tracks should result in the same rendered output from the Clip Monitor or Project Monitor.

SOFTWARE/OS VERSIONS
Windows:  11
Comment 1 Bernd 2022-12-21 01:11:57 UTC
I could reproduce the described observation. The change in the Clip Monitor is subtle but noticeable.
Comment 2 Bernd 2022-12-21 01:12:57 UTC
(In reply to Bernd from comment #1)
> I could reproduce the described observation. The change in the Clip Monitor
> is subtle but noticeable.

And this was on Windows 11 with version 22.12.0