https://bugs.kde.org/show_bug.cgi?id=496494
Bug ID: 496494
Summary: Wipe / Luma / Dissolve transition settings are not
documented
Classification: Applications
Product: kdenlive
Version: git-master
Platform: Other
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: Video Effects & Transitions
Assignee: j...@kdenlive.org
Reporter: contact+bugs+...@yannsalmon.fr
Target Milestone: ---
SUMMARY
Kdenlive has a Wipe transition as well as Luma and Dissolve, which appear to be
so closely related that the docs have the latter point to the former
<https://docs.kdenlive.org/fr/compositing/transitions/wipe.html>, with a note
mentioning additional parameters Use transparency and Make padding transparent.
However, there is no explanation as to what these parameters do.
I have not the faintest idea what these mean, but in my projects, having these
settings checked (which is the default) causes a flash during the transition,
as if the transitioning track were briefly transparent and showing the track
below (or plain black).
STEPS TO REPRODUCE
1. Put two clips next to each other on a track.
2. Select the left clip.
3. Press U on the keyboard.
OBSERVED RESULT
A transition is added between the two clips, of king Luma, with None (Dissolve)
mode and both Use transparency and Make padding transparent. Rendering shows a
brief black flash during the transition.
EXPECTED RESULT
Default transition settings should not add rendering artifacts (or at least it
should be clearly explained in the doc and the tooltips in the transition GUI).
SOFTWARE/OS VERSIONS
Operating System: Kubuntu 24.04
KDE Plasma Version: 5.27.11
KDE Frameworks Version: 5.115.0
Qt Version: 5.15.13
Kernel Version: 6.8.0-49-generic (64-bit)
Graphics Platform: offscreen
Processors: 8 × Intel® Xeon® CPU E3-1245 v5 @ 3.50GHz
Memory: 31.2 Gio of RAM
Graphics Processor: NVIDIA GeForce GTX 1650/PCIe/SSE2
ADDITIONAL INFORMATION
It is also not clear why there are Wipe and Luma and Dissolve if, says the doc
in
<https://docs.kdenlive.org/fr/compositing/transitions/transitions_list.html>,
"Dissolve works exactly like Wipe but has additional parameters." and "Luma
works exactly like Wipe but has additional parameters."
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