[Pdmtl] [PD] Gem: firewire OSX problems
tigital at mac.com
Wed Mar 22 23:22:57 EST 2006
On Mar 22, 2006, at 6:53 PM, Alexandre Quessy wrote:
> I am using a firewire mini-DV camera with Gem on Hans' Pd-extended
> 0.39-2 on Mac OS X Tiger. This camera is usually 720x480 pixels. There
> are 2 problems I am facing right now :
...if you are just using the gem that comes in pd-extended, I suggest
replacing it with the most recent one found on my website: http://
> 1) [pix_video] is having a hard time trying to connect with the
> I get the silent green screen. Are there options I should check
> out ? Is
> Pd-Extended-0.38-4's Gem more stable on Tiger ?
...green screen means yuv processing; since you are trying to use
[pix_mask], the help patch says it require RGBA, so i'd send the
following messages to [pix_video]:
[dimen 720 480<
...if this doesn't work, send [dialog< to the object, and make sure
the correct device is selected, and that video is working there (also
play with various scopes for fun)...
> 2) I am trying to apply a [pix_mask] to this video stream from
> loops. I always get an error telling me that there is a size mismatch.
> They are all 720x480 quicktime files of about 50 Mb max. Maybe another
> codec would work better ? Motion jpeg ? (as read on the pd-list) AVI ?
> MPEG4 ?
...[pix_mask] would require a codec with an alpha channel, also your
footage would need an alpha channel that is somehow meaningful (ie.
not all 1 or 0)...AVI's just a container for a movie, like .mov...
> Thanks ! (this is kind of 48 hours before the show...)
...doesn't matter, as long as it works for the show ;-)
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