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RE: CSequence and getSimilarity function

Hi dean,

thanks for your explanation. I have been able to generate shots with an
offscreen QDGraphics but i don?t know how can i use one of the compositor
classes to draw this offscreen image to a onscreen one for monitoring. Can
you give me some instructions or example?. A lot of thanks.

Bye

Esteban Luengo

-----Mensaje original-----
De: dean perry [mailto:email@hidden]
Enviado el: lunes, 24 de febrero de 2003 12:43
Para: email@hidden
CC: email@hidden
Asunto: Re: CSequence and getSimilarity function



On Monday, Feb 24, 2003, at 21:41 Australia/Melbourne, Esteban Luengo
wrote:

> MoviePlayer myPlayer = new MoviePlayer (m);
> MoviePlayer mp = (MoviePlayer)myPlayer;
> myQTCanvas.setClient (myPlayer, true);

> I need to write a process in
> background mode. It is possible to compare 2 frames in a QTCanvas that
> is
> invisble in the screen?. Thanks a lot.

so first - the problem - if you grab the canvas pixels for a movie, you
DO NOT grab the hardware drawing overlay.

The hardware overlay (usually) gets used when ever the video is
compressed with a codec that works best in a YUV colour space - eg:
mpeg, dv, h263 etc etc.

So, you need to set the gworld of the movie to the offscreen QDGraphics
and NOT add it to the QTCanvas. (ie: you must make your own movie
controller etc - adding it to the canvas will CHANGE the gworld of the
movie);

Putting the movie offscreen makes it render using all software... be
aware - this is lower performance than using the hardware drawing (if
you are trying to do this real time etc).

you could then use one of the compositor classes to draw this offscreen
image to a onscreen one for monitoring...


cheers,

dean perry
abstract plane pty. ltd.
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 >Re: CSequence and getSimilarity function (From: dean perry <email@hidden>)



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