https://bugs.kde.org/show_bug.cgi?id=422592
Bug ID: 422592
Summary: Rendering speed extremly slow, when no filters are
applied
Product: kdenlive
Version: 20.04.1
Platform: Appimage
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: Effects & Transitions
Assignee: vpi...@kde.org
Reporter: bugs....@uhrlau.de
Target Milestone: ---
SUMMARY
Rendering an video with h264 or h265 is extremly slow when no filters are on
the video.That means: When I render a video using any filter (even a
dummy-"Transform" on Master Effects will do) it will take about 60 minutes for
a 15 minute video. When I do the same video without any filter then rendering
takes about 11 hours (11 times as much). Cpu usage is 100% on all cores in
either case.
This strange effect is independent of the video, raw format and so on.
STEPS TO REPRODUCE
1. render a short movie without any filter from mp4 input.
2. render the same movie using any filter, you can try "Transform" without
giving it anything to do.
3. whatch the rendering times.
OBSERVED RESULT
rendering takes much longer without filter.
EXPECTED RESULT
rendering should take longer with filter.
KDENLIVE-VERSION
kdenlive-20.04.1b-x86_64.appimage
SOFTWARE/OS VERSIONS
Operating System: openSUSE Leap 15.1
KDE Plasma Version: 5.18.90
KDE Frameworks Version: 5.70.0
Qt Version: 5.15.0
Kernel Version: 4.12.14-lp151.28.48-default
OS Type: 64-bit
Processors: 8 × Intel® Core™ i7-7700K CPU @ 4.20GHz
Memory: 31,3 GiB Arbeitsspeicher
Graphics Processor: GeForce GTX 1060 6GB/PCIe/SSE2
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