Hi all,

I am still concerned with the possibilities of shared tracks (an shared 
plugins).
I have the feeling this could be a very powerfull tool, if there wheren't some
problems...

ichthyostega.de wrote:
> Chained tracks seem to be an advanced feature overloded with several
> possible uses
>  - sharing a processing chain on different material
>  - deriving and overlaying different versions of the same source footage
>  - accumulating several masks from different tracks
>  - changing the order overlays are output to differ from the
>    order of the tracks
>
> further possibilities?

Andraz Tori wrote:
> Actually i am not completely sure that all of the above is possible due
> to shared tracks (shared, not chained!)
>
> For changing the order of overlays, you could use overlay plugin...

You are probably right. I rechecked my ideas and found some problems to
hinder what I thought should be possible.

 - I had difficulties controlling the overlay-mode. The overlays behave
   as in "replace" modus": the masked off regions are black, but not transparent
   (i.e. we can't se the content of tracks below the track recieving overlay).
   I can switch the target track to "additive" mode or fade it halfway in order
   to get some transparency, but I don't want this. I just need a mask, i.e. 
normal alpha.

 - handling of the whole feature of shared tracks ist difficult and requires 
some tinkering.
   To my opinion the reason for this is the combination of two different 
functionalities in
   one feature: you import the processing chain (plugins and masks) of a 
different track
   and at the same time you export processed image data to the other track.

Based on this asessment my question to the cinelerra experts:
Would it be (technically) possible to change or extend this behaviour?
 * "shared tracks" could behave like a plugin: when right clicking on its bar in
   the track and chosing the setup menu there could be a options dialog.
 * this would contain some switches (of course keyable like normal plugin 
parameters)
   - import mask of "Track B" (yes/no)
   - import plugins of "Track B" (yes/no)
   - send output to "Track B" (yes/no)
 * as a plus, the overlay mode could be controllable (normal, additive, 
subtract, divide, replace)
By default all switches were to be set to "yes", thus reproducing the current 
behaviour (and not
breaking any existing cinelerra sessions).

What is your opinion? sounds silly? technically feasible or requires major 
rewrite?
(btw. I am a programmer, I could try to do it if it's not a major rewrite...)


bye,
Hermann



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