Hi Tom,

Unfortunately, there  are deep rooted  problems with Movit effects, so I'm afraid you'd get similar issues even with newer versions.

In general, you can easily try recent versions by downloading Appimage versions, but it seems that Movit is not available in those.

Cheers,

Camille

PS : you might still want to use newer versions, as many cool features have been added.

Le 05/07/2021 à 20:25, amin...@mailbox.org a écrit :
Failing a workaround, can anyone confirm this is fixed in newer Kdenlive 
(20.12+)?

Also, here's the console output each time I try to add a Movit/GLSL transition:

     Falling back to using screens root_visual.
     QTimeLine::start: already running
     org.kde.knotifications: Audio notification requested, but sound file from 
notifyrc file was not found, aborting audio notification

Tom

On Sun, Jul 04, 2021 at 09:14:41PM -0600, amin...@mailbox.org wrote:
I'm using an older version of Kdenlive (18.12.3 - the version on Debian Stable). When I 
try to add certain transitions (the Movit transitions), it gives me an error: 
"Problem adding effect to clip." Is there any way to work around this?

Hopefully this is fixed in later versions, but even if it is, I'd love to hear 
of a workaround for my current setup.

Other symptoms:

   - Movit effects (as opposed to transitions) work just fine
   - I've just gone through and tested, and all Movit transitions have this 
problem, and no non-Movit transition has this problem
   - Kdenlive under the hood appears to successfully use the "Overlay (GLSL)" 
transition to mix video tracks when I look in the MLT XML, but I'm unable to use that 
transition myself in the UI

Thanks,
Tom

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