Bug 506606 - Kdenlive timeline slow when working with and color grading 4k clips on long projects on mid range hardware
Summary: Kdenlive timeline slow when working with and color grading 4k clips on long p...
Status: REPORTED
Alias: None
Product: kdenlive
Classification: Applications
Component: Timeline & Editing (other bugs)
Version First Reported In: unspecified
Platform: Other Linux
: NOR normal
Target Milestone: ---
Assignee: Jean-Baptiste Mardelle
URL:
Keywords:
Depends on:
Blocks:
 
Reported: 2025-07-04 20:51 UTC by agapp11@hotmail.com
Modified: 2025-07-04 20:51 UTC (History)
0 users

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Description agapp11@hotmail.com 2025-07-04 20:51:19 UTC 
SUMMARY
Kdenlive timeline slow when working with 4k clips. Also color grading is impossible with proxy clips due to quality of clips being too low to see.

STEPS TO REPRODUCE
1. Import 4k log footage on laptop with discrete gpu
2. Clips not using proxy
3. Attempt to color grade full project (15 mins), kdenlive slows down particularly with many effects

OBSERVED RESULT
Kdenlive slows to a crawl and it becomes impossible to check footage without rendering and waiting for it to render. This slows workflow and makes it difficult to use

EXPECTED RESULT
Kdenlive offloads some of the work to the gpu

SOFTWARE/OS VERSIONS
obs-vkcapture] Init Vulkan 1.5.2 (64bit)
Operating System: Arch Linux 
KDE Plasma Version: 6.4.0
KDE Frameworks Version: 6.15.0
Qt Version: 6.9.1
Kernel Version: 6.15.3-arch1-1 (64-bit)
Graphics Platform: Wayland
Processors: 12 × Intel® Core™ i7-10750H CPU @ 2.60GHz
Memory: 24 GiB of RAM (23.3 GiB usable)
Graphics Processor 1: NVIDIA GeForce RTX 2060
Graphics Processor 2: Intel® UHD Graphics

ADDITIONAL INFORMATION