https://bugs.kde.org/show_bug.cgi?id=436895
Benjamin Gaidioz <bgaid...@gmail.com> changed:
What |Removed |Added
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CC| |bgaid...@gmail.com
--- Comment #1 from Benjamin Gaidioz <bgaid...@gmail.com> ---
Hello,
A couple of days ago I've stumbled on a similar problem with 21.04.0 too. I
could track my problem to a the detail I describe below. Hope this helps.
Literally I was implementing the popular laser saber effect. Every once in a
while I would play the video to see how it looked. At some point, the
interpolation of the masking behaved as if only keyframes N and N+100 had been
entered: totally ignoring in between ones, although the spline path was
correct.
I opened the .kdenlive XML project file see if I could recover something:
In the faulty rotoscoping section, I noticed the JSON object representing the
multiple keyframes of the spline had keys ordered _alphabetically_ (keyframes
"100" to "150" would show right after "10" and before "11") and not
numerically.
By manually reordering these keys in numeric order, the masking got to follow
the spline again. I'm still editing the video and periodically I go fix the
file, it still happens, my fix must be not totally perfect.
Regardless if this is the exact root cause of the buggy rendering, what
triggered this state? No idea so far. I haven't tried to reproduce this
separately, but I have kept a copy of the wrong file.
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