[PD] Re: GEM vs Jitter a newbie request for opinions (newbie sez thanks)

chris clepper cgc at humboldtblvd.com
Sat Oct 25 20:10:09 CEST 2003

>  > periodically save it to a file(s)
>is pix_write working in OSX yet? Are you talking about saving a chunk of
>video, or individual frames? I never tried using pix_multiimage to load an
>array of images files saved with pix_write the performance may not be all
>that great.

pix_write works in OSX.  By default it writes out single high-quality 
photo-jpeg files into an image sequence which can be loaded into the 
QTPlayer.app and saved as a .mov file.  The one caveat at the moment: 
using pix_write with pix_snap results in the images being flipped on 
the y axis.  This is because QT and GL disagree on where to begin 
drawing pixmaps - QT starts in the top left, GL in the bottom left. 
I can add a flip function which will take care of this internally but 
it will affect speed somewhat.  Currently I can record 640x480 scenes 
at 30fps (1ghz powerbook) using pix_snap + pix_write, but that might 
not be possible with the flip function in place.  I will also talk to 
some people at Apple to see if there is a better solution to this.

It also wouldn't be too much of a chore to code up a QT movie 
recording object, but the soonest I could get to it would be next 

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