Is there a way to change the duration of this transition?
Or maybe what I shoud ask is, how to apply this transitions to have a ‘clean’ effect. Now I can see the first clip ‘under’ the curl effect. I’ve tried dissolve and horizontal bar as default transitions to get the thing.
OK I see the problem. The underlying problem is that the GL-Transitions are not true transitions in Shotcut. To perform a true transition you need to be able to access the 2 images in the clips that are transitioning. With WebVfx this is not possible. The upper image (e.g. that on V2) is available, but not the lower image (V1), so I had to change the GL-Transitions to only use the upper image.
On some transitions (such as Swirl) this does not matter, while on others, such as Bounce the transition does nothing at all. This is not a deficiency in the GL-Transition filters per se, The problem is that there is no mechanism for WebVfx to pass the second image, so that it can be operated on.
This is why I do not yet provide WebGL transitions in Shotcut.
With WebVfx this is not possible.
Actually, it is possible, but not yet in Shotcut due to the fact that transitions are not yet extensible at the MLT service level (only in the custom wipe file, which is buying time). (Also, I am worried about the future of WebVfx in Shotcut.)
The GL transitions work best with either an overlap transition, or using two tracks with an opacity filter. They used to work well with Mask From File, but there have been so many changes and enhancements made that they don’t work very well anymore.
The page curl transition never worked very well.
To make a decent page curl you need to use green screen footage.
Yes I realise that the since in later versions of Qt the Chromium-based WebEngine component replaced QtWebKit it is likely that an upgrade of Qt in Shotcut will mean that WebVfx would need major work to carry across, probably too much for it to be viable. I don’t know how much effort it would take to port it to WebEngine.
There is a separate QtWebkit development effort, but I don’t think you’d want to use that as its maintenance seems somewhat questionable.
First of all, this community is one of the best, if not the best, in which I have been lucky enough to participate. The support, the help, and the willingness to teach those of us who are just starting out is simply spectacular.
About the problem with pagecurl, I will use the technique proposed by @sauron, or maybe a second video track below and make the “transition” over an empty transparent image, see what happens.
I am much more concerned about what is being said about WebVfx, now that I was starting to learn how to use it :’(
I’m even programming (at my level) a basic tool to generate the skeleton of pages with WordFlash (@jonray and @elusien) by changing animations, times, number of lines, sizes… in a simple GUI