Bug 496299

Summary: KDenLive Not Rendering Both Video Tracks for PIP Effect
Product: [Applications] kdenlive Reporter: Thomas Nield <thomasnield>
Component: Rendering & ExportAssignee: Jean-Baptiste Mardelle <jb>
Status: NEEDSINFO WAITINGFORINFO    
Severity: normal CC: berndmj
Priority: NOR    
Version: 24.08.3   
Target Milestone: ---   
Platform: macOS (DMG)   
OS: macOS   
Latest Commit: Version Fixed In:
Sentry Crash Report:

Description Thomas Nield 2024-11-15 12:55:27 UTC 
SUMMARY

I created a simple video with a Picture in Picture effect, with an MP4 as the primary video and an MOV with webcam footage. For the webcam footage I used a crop effect then transform to resize and put in bottom right corner. But when I export, I only see the primary video and the audio from the webcam footage. The webcam video is missing.

STEPS TO REPRODUCE
1.  Make an MP4 the primary video
2.  Make an MOV the second video
3. Crop and transform, the MOV
4. Export

OBSERVED RESULT

See no secondary video is in exported video

EXPECTED RESULT
All video tracks should be rendered as shown in the preview panel 

SOFTWARE/OS VERSIONS
macOS: Sequoia 15.0.1
KDenLive: 24.08.3
Comment 1 Bernd 2024-11-15 22:11:39 UTC 
Please let us know more specifics about how you set it up on the timeline.

For me the following setup works:
1. Primary video (P) on V1
2. Secondary video (S) on V2 (will be the PIP in the bottom right-hand corner)
3. Crop, Scale and Tilt effect on S with some crop values
4. Transform effect on S with Size @ ~ 34%, and X and Y to move it to the bottom right-hand corner
Comment 2 Thomas Nield 2024-11-15 23:04:08 UTC 
Would it help if I provide a link to the project file and the two video assets?
Comment 3 Bernd 2024-11-16 00:24:49 UTC 
(In reply to Thomas Nield from comment #2)
> Would it help if I provide a link to the project file and the two video
> assets?

Absolutely. Seems your setup is different, then.
Comment 4 Thomas Nield 2024-11-16 18:07:34 UTC 
(In reply to Bernd from comment #3)
> (In reply to Thomas Nield from comment #2)
> > Would it help if I provide a link to the project file and the two video
> > assets?
> 
> Absolutely. Seems your setup is different, then.

Thanks, here is a link to the project and assets with it: 
https://1drv.ms/f/s!AoxKpPBUQ5LnmZ9nIiUJBB8aVPrzLQ?e=evkP6w
Comment 5 Thomas Nield 2024-11-16 18:45:09 UTC 
So interesting... I ran this render job on my Alienware running Linux Mint and it all works. I don't know what's going on with KDenLive on my MacBook Air M2.