Chroma Key rendering would be tricky at best in pure RB, and you'd
need to make sure your footage is filmed against a key blue/green
backdrop.
I'm pretty sure core graphics/core animation under OS X has a built
in routine for handling this (as well as difference frame rendering
where QT only renders pixels that are significantly different from a
reference frame), but I'm unsure how to access them from within RB.
(+ core animation is not even publicly available yet).
Does this need to be in real time??
If not you could do a frame by frame render, where you use a "key"
reference frame and then composite it with your video source, over-
painting all of the static pixels in each video frame with the
corresponding pixels from the reference frame. This could be VERY cpu
intensive though.
- Tom
On 30/07/2007, at 11:56 AM, Giuseppe Farese wrote:
> Hello:
>
> For an application I'm working on, I need a window with a video and
> it should have a transparent background, so I can see only the moving
> object in the movie (the face of the person offering help) and the
> background of the movie transparent.
>
> I know how to do it with images in order to create not rectangular
> windows, however I would like to know if anyone can point me out on
> how to do it with a video.
>
>
> Regards,
>
>
> Giuseppe Farese
>
> _______________________________________________
> Unsubscribe or switch delivery mode:
> <http://www.realsoftware.com/support/listmanager/>
>
> Search the archives:
> <http://support.realsoftware.com/listarchives/lists.html>
_______________________________________________
Unsubscribe or switch delivery mode:
<http://www.realsoftware.com/support/listmanager/>
Search the archives:
<http://support.realsoftware.com/listarchives/lists.html>
|