Bug 509806

Summary: Ridiculous timing indications at rendering a perfectly correct video
Product: [Applications] kdenlive Reporter: Uwe Dippel <udippel>
Component: Rendering & ExportAssignee: Jean-Baptiste Mardelle <jb>
Status: REPORTED ---    
Severity: minor    
Priority: NOR    
Version First Reported In: 25.08.0   
Target Milestone: ---   
Platform: Fedora RPMs   
OS: Linux   
Latest Commit: Version Fixed/Implemented In:
Sentry Crash Report:
Attachments: Most strange fps indication
Thermometer with unbelievable values
"Ready" despite of still running

Description Uwe Dippel 2025-09-22 22:21:08 UTC
Created attachment 185171 [details]
Most strange fps indication

SUMMARY

I encountered some unbelievable timing indications, including the 'thermometer' moving forth and back. To my surprise, the rendered output is spotlessly correct and play okay.

STEPS TO REPRODUCE
1. Render a specific video source

OBSERVED RESULT
Ridiculous indications, including negative fps, show

EXPECTED RESULT
Correct indication of timing

SOFTWARE/OS VERSIONS
Fedora 42

ADDITIONAL INFORMATION
Having rendered thousands of movies with kdenlive, I've never seen this before. 
Again, it seems to have to make with timing, somewhat similar to e.g. #509101, where the bug also sets in immediately after some timing operation.
Comment 1 Uwe Dippel 2025-09-22 22:22:51 UTC
Created attachment 185172 [details]
Thermometer with unbelievable values
Comment 2 Uwe Dippel 2025-09-22 22:24:26 UTC
Created attachment 185173 [details]
"Ready" despite of still running