[PD] Fading between 4 videos - performance issues

[james tittle]

hiya,

On Dec 13, 2005, at 1:32 PM, Nuno Godinho wrote:
> I even removed 2 clip leaving only 2, and still everything was  
> slow. I even
> tried with only one clip and noticed that, although the clips was  
> running
> smoothly [ctlin] had a significant delay and after I moved the  
> fader would
> only reflect the changes after almost one second. Weird, isn't it?

...at this point, if it can't even play one clip, I think we can  
assume that you have something hooked up "incorrectly"...I just went  
back to the post where you had the patches, and I can say that  
there's any number of problems I can see, all having to do with order  
of operations!

...this is usually a big gotcha:  you can't just connect multiple  
outputs from one object to many other objects and expect it to behave  
in any understandable manner:  what you need to do is add [trigger]  
objects to get a better flow of messages...

...to start in "vela.pd", you should get rid of one of the  
numberboxes, then put a [t f f f f] afterward, because as it is, that  
[ctlin] number could go in any order to the four subpatches...

...then go thru your subpatches and wherever you see multiple  
connections from one object, insert a trigger:  a particularly bad  
spot is in the [pd calculaligadodesligado] subpatch, where you have a  
numberbox going to both inlets of [+]...who knows what'll be the  
result...the following will give you more what you want:

[number]
|
[t b f]
  |   |
[+    ]

...the same idea goes for multiple connections from [inlet], but  
[loadbang] in general is ok (but could make for some unexpected  
initial behavior)...

...also, inserting numberboxes is good for debugging, but can slow  
down the whole thing, so you might want to make them optional...

...try this, and then we might get less weirdness ;-)

james