[Kdenlive-devel] transitions

[Reinhard Amersberger]

kdenlive-devel at lists.sourceforge.net schrieb am 19.05.03 23:49:23:
> 
> On Monday 19 May 2003 2:25 pm, Rolf Dubitzky wrote:
> > > Video/Audio (like we currently do) to simplify the timeline. However in
> > > this case, I would assume that the transition of sound and video would be
> > > linked together?
> >
> > linked yes, but they will still be different things. for any transition
> > between tracks you will have to specify a video and an audio transition. Of
> > course tere can be some 'default' audio transition connected to any given
> > video transition, but still there will be two objects connected to a
> > transition, one audio, one video.
> 
> Ok, I see what you mean. I am wondering though, if this is more a case of 
> prioritising having separate video/audio tracks? At the point where you want 
> to perform different transitions on video and audio, I wonder if it is less 
> confusing to treat them separately.
> 
> Either way, I think the two transitions would be "merged" into one for the 
> timeline, and treated as a super video-audio transition in which you can 
> change the two transitions in the same way that you can change video/audio 
> codecs separately.


Hhhmmm .... tell me if I'm wrong guys, but I think think it get's more and more confusing, because there are more and more sort of transitions like Video transition, audio transition, super transition, ......
I'm not sure if I was able to make it clear enough what I wanted when I was talking about "having a build-in transition for every clip"? .... probably not ;-))

My idea was to enhance the clip edges functionallity.
Right now the clip edges performimg a simple "cut", when two clips snap together.
And user can easily change the cut point by moving the clip edges.
So why not simply moving the upper corners of a clip inside to create a slope edge.
If Kdenlive detect an overlapping clip, then it could automatically create a linear transition.
Isn't that pretty easy?



> > Anoter thing is, even if you treat audio separet from video, the two tracks
> > should still be locked (at least per default) so that if you move the audio
> > part, the video gets moved synchronously.
> 
> Of course :-) though there should also be the option to unlock them so that 
> you can use them asynchronously ;-)


Sure.
So, just to continue the upper example, when video and audio are unlocked and user moved the upper corner of the audio clip only, Kdenlive will create just a transition of both rollover audio clips.


> > > I think that one addition that should be made to the transition picture
> > > is that there should not necessarily be only a single variable that
> > > changes within a transition - if we assume an audio/visual track for the
> > > moment, and a crossfade transition, video could have it's own crossfade
> > > 'red line', and audio could have it's own crossfade line.
> >
> > sure. in the separate dialog you can handle as many variables as you want,
> > and there will be probably not only variables of type "double", which can
> > be visualized as a "red line", but also of type "Color", "Point", "Box",
> > etc....
> 
> You know, I'm itching to write the colour keyframe widget/track, but there's 
> so much other stuff that needs to be done first :-)



Again, the edge is still there; can you use it to store the parameters?
So later on it could be pictured as a curve when user don't want a linear transition, or he can change it to have a wipe effect or something alse.

Furthermore ... incorporating a third track into a transition could be easy too, because user just have to put a clip on top of the timeline, move the upper left corner to the right side to create a slope edge.
In this case it would be helpful to set the transparency of this clip by simply moving the top side of that clip down? 


I also still thinking about to handle such stuff without using the mouse:
So if there would be a way to select a border of a clip, or of some clips, then it would be pretty easy to do some edit operations by using the arrows.
Just some examples:

[moving cut point between two snapped clips]
Select the edges that snapped together and press the left arrow to move the cut one frame to left.

[creating a fade]
Select edge(s) user want to have a fade in/out , hold a key down so that Kdenlive is informed to create a fade action (maybe the 'ALT' key ?), and press the appropriate arrow in addition to create a fade of one frame.


[creating a transition between two clips (maybe on different tracks)]
Select the edges that should be involved into this transition and perform the 'transition-action' to create a transition between this clips.


 
Please guys, tell me if I'm telling senseless stuff here, do I will stop my thoughts on that!

greretings
Reinhard