[PD] pix_record mixed pixes

[Mathieu Bouchard]

On Wed, 6 Dec 2006, IOhannes m zmoelnig wrote:

> due to the signal-flow nature of pix-processing you have to add 
> [pix_record] after all pix-processing objects you want to have an effect 
> on the recorded video.

that's not very surprising: the same thing would happen to messages and 
DSP. (well, I'm surprised by the phrase "signal flow": what does it mean?)

what's a lot more surprising is that

[pix_video]
  |
[pix_gain]
  |
[t a a]
  |   |
  |  [pix_invert]
  |
[pix_record]

actually applies [pix_invert], because gem messages handle pix (and all 
the other state) by pointer, so that the pix seemingly sent from 
[pix_gain] to [pix_record] is actually modified although the message sent 
isn't modified.

This doesn't necessarily happen in other video plugins.

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| Mathieu Bouchard - tél:+1.514.383.3801 - http://artengine.ca/matju
| Freelance Digital Arts Engineer, Montréal QC Canada