That's very unfortunate to hear! I use Movit effects (filters as opposed to 
transitions) very extensively and wouldn't really be able to use Kdenlive 
effectively without them.

Do newer versions of Kdenlive use something else for GPU-based processing? And 
can I at least expect the Movie filters I already use to continue to work? (It 
sounds from your message like maybe not?!)

Thanks,
Tom

On Mon, Jul 05, 2021 at 11:03:40PM +0200, Camille wrote:
> 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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