Bug 500541

Summary: Image sequence (MIME type) out of order
Product: [Applications] kdenlive Reporter: Timwi <bugs.kde.org>
Component: Project Bin & ImportAssignee: Jean-Baptiste Mardelle <jb>
Status: RESOLVED UPSTREAM    
Severity: minor    
Priority: NOR    
Version First Reported In: 24.12.2   
Target Milestone: ---   
Platform: Microsoft Windows   
OS: Microsoft Windows   
Latest Commit: Version Fixed/Implemented In:
Sentry Crash Report:

Description Timwi 2025-02-21 19:00:45 UTC 
SUMMARY

The “Add Image Sequence” command, when using the MIME type option, has a mind of its own when it comes to the order in which to include the images and provides no means to reorder them.

STEPS TO REPRODUCE
1. Create ≥ 11 images named “Image0.png”, “Image1.png”, etc., up to “Image10.png” (and optionally beyond).
2. Project → Add Image Sequence, method: MIME type
3. Select the folder containing the images

OBSERVED RESULT

The images are ordered Image0.png, Image1.png, then Image10.png, then Image2.png, etc. It is clear that they are lexicographically sorted.

EXPECTED RESULT

I suppose lexicographical sorting isn’t the worst of defaults, but given that it fails in this situation, the user should have the option to reorder them. I’d be happy even if that option is available only by editing the project XML file, but it looks like that is not an option.
Comment 1 Jean-Baptiste Mardelle 2025-03-26 08:18:30 UTC 
Image sequences are handled inside our video backend MLT, and yes, it uses a basic alphanumeric sorting and there is no way to manually reorder the images. We have no plan to change that in the short term, the workaround is to correctly name your images like:

Image001.png
Image002.png
Image003.png
...

There are probably some utilities that can hadle such renaming