Re: [GnomeMeeting-list] Colour problem with FireWire webcam

[Damien Sandras <dsandras seconix com>]

Le ven 12/09/2003 à 14:30, Chris Rankin a écrit :
>  --- Damien Sandras <dsandras seconix com> wrote:
> > Hi,
> > The driver is probably wrong or buggy in 160x120
> > with the color format
> > requested by GnomeMeeting (YUV420P).
> 
> Well, I know the camera does work in 160x120 mode
> because my other libdc1394 application displays a
> picture OK. The problem must be in what GnomeMeeting
> or pwlib is asking libdc1394 to do.

Having an application working ok doesn't mean all applications will work
ok. As I told you in the email, GnomeMeeting is requesting YUV420P,
perhaps your other application is not using YUV420P.

> 
> Is YUV420P related to YUV (4:4:4) or YUV (4:2:2)? If
> so then can you explain how, please?

Yes it is related. YUV 4:4:4 is YUV444, and YUV 4:2:2 is YUV422, you can
have a look at vconvert.cxx in pwlib, that's the place where color
conversion routines are coded.

> 
> Thanks,
> Chris
> 
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-- 
 _	Damien Sandras
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