Thank you a lot guys!
Thanks to your suggestions, this seems to be the solution (see attached
patch). I have to try it on Mac though, to see if it really fixes the
issue (hard to predict since the issue itself is pretty strange), but I
expect it to.
I didn't expect the spigoting-the-gemhead-trick to work: I thought that
having pix_movement receive the gemlist only some of the times a frame
was rendered would cause strange interactions.
The pix_texture-right-inlet-trick even allows me to monitor the movement
signal which is great.
On 04/05/2011 05:03 PM, cyrille henry wrote:
depending on the aplication, it can help to separate the tracking and
the rendering on 2 diferents process (2 diferent pd).
(most computer have multiple processor now)
to slow a gemhead, you can stop it (sending it 0) and then send it bangs
with a metronome.
if you don't use it for rendering it should work...
c
Le 05/04/2011 16:47, Matteo Sisti Sette a écrit :
On 04/05/2011 04:33 PM, chris clepper wrote:
I used pix_movement and blob for basic motion detection for years. I
gated the video signal so it would only output every half second or
second
How do you gate the video signal? That may be exactly the workaround I
need
Try setting the GEM framerate to the
advertised frame rate of your device and see if that helps.
Yes it does help, it fixes the problem completely. But that is not an
option if i need to produce graphical output at a higher framerate.
It's ok to detect the movement at a rate equal to or lower than the
camera frame rate, but i can't lower the whole gem framerate because
that will affect video output.
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#X obj 462 723 gemwin;
#X msg 404 671 create \, 1 \, frame 25;
#X msg 533 673 destroy;
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#X obj 222 259 pix_yuv;
#X obj 223 293 pix_movement 0.2;
#X obj 223 334 pix_blob;
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#X obj 180 545 - 0.5;
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#X obj 40 438 pix_texture;
#X obj 43 395 gemhead 1;
#X obj 87 553 gemhead 3;
#X obj 180 575 * 8;
#X obj 94 660 colorRGB 1 0 0;
#X obj 225 40 gemhead;
#X obj 225 70 t a b;
#X obj 252 99 f;
#X obj 285 93 + 1;
#X obj 287 122 % 3;
#X obj 252 142 == 0;
#X obj 222 201 spigot;
#X obj 404 624 loadbang;
#X text 57 362 MONITOR;
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#X connect 1 0 0 0;
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