[Fluxus] FreeFrame and Video Buffer

[Kassen]

On Sun, May 20, 2012 at 11:21:29AM +0200, roger pibernat wrote:
> Hi there,

Hey Roger,
 
> I'm planning to do a real-time video manipulation app and I'm considering
> fluxus to code it.  But I have 2 questions:
> 
>    1. I know there's a FreeFrame plug-in but I can't find it (I saw it on
>    the FF site).  Any clues on where to download it?

This I don't know about, it's not something I think I heard of in the
Fluxus context. For filtering and so on we do support GL shaders.

>    2. Is there any way to access the video buffer so I can manipulate it's
>    data?  Is it possible to write to the buffer in real-time?
> 
> the reason for question #2 is that I want to overwrite the video buffer
> after manipulating it.  In other words, I want to write the filtered and
> manipulated result to the same buffer I was reading from.  The workflow
> would be something like this:

Well, yes, and no. You can't write to the video buffer directly (as in
setting pixels and so on) but you can do that to  textures and
textures can consist of the output of a renderer. So; if you would
create aplane covering the whole screen, give it a texture like that
then you would have more or less what you need. 

On the down-side; doing per-pixel per-frame manipulations on those
will be fairly slow which will be a issue for the realtime performance
you require.

As much as I'd like to "sell" you a copy, I'm not so sure Fluxus would
be a very good match for these requirements in practice.

Yours,
Kas.