[PD] gridflow with web-#camera

[Mathieu Bouchard]

On Fri, 23 Jun 2006, Alexandre Castonguay wrote:

> I added a test patch in /doc/examples.

It was called webcam.pd. There's no /doc/examples in Gridflow's CVS: you 
added it in /examples instead. I have just moved and renamed the file as 
/doc/flow_classes/#camera-help.pd because [#camera] doesn't have a help 
file and because it doesn't belong in /examples, which is for demoing 
what's possible with GridFlow (generally large patches), whereas 
/doc/flow_classes is for help files (which are small patches except for 
the larger number of comments in them).

> Once you have it running, you have to select the "colorspace YUV420P" and
> "transfer read" options and select the YUV -> RGB conversion.

Yes. That's because I don't know an automatic way to detect the transfer 
type (how to download images from the driver), and each driver may skip 
implementation of one of the two ways, because it's not implemented in a 
global way. The rest is because kernel authors *forbid* driver authors 
from implementing any color conversions inside the driver. (!!!)

To anyone dealing with Video4Linux 1: What's a good way of autodetecting a 
suitable colorspace ?

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