Re: Why can't my usbcamd driver work well for MSN messenger?

Tech-Archive recommends: Repair Windows Errors & Optimize Windows Performance

From: haipt (hai_at_eyepowergames.com)
Date: 01/25/05 

Date: Tue, 25 Jan 2005 10:21:51 +0800

This was once discussed on this newsgroup, topic "Streaming minidriver
problems with Microsoft Messenger"

I quote part of the discussion here. So it seems that your format is
supported.
"
WMessenger needs decoded video data (RGB, YUV and so on).

Your driver needs to expose the following specs of the video source pin to
WMessenger.

In a few words, the sizes attempted are:

176_144 (this 1st tried, default, preferred)
128_96
352_288
160_120
320_240
240_180

As for the formats, the order is:

MSH263, MSH261, I420, IYUV, YVU9, YUY2, UYVY, RGB16, RGB24, RGB4, RGB8.
Notice that, with a few exceptions, they are tried in increasing order of
frame size (in bytes, for a given image size), thus attempting to save
bandwidth.

For the frame rate, a maximum of 30 fps is attempted; I think 30 is more
than enough from a quality point of view (actually 15 is good enough
already).

HOWEVER, we (Microsoft) are working on USB Video Class (current version is
V0.7c) in USB DWG.

"

"Zhi-Wei Chen" <ZhiWeiChen@discussions.microsoft.com> wrote in message
news:055CF30A-C504-4BD8-ADFE-774735E6E84C@microsoft.com...
>
>
> "MSN Messenger requires raw frame format (e.g. RGB24), and certain frame
size"
> Where or How can I know the frame format and size supported by MSN
messenger.
> Do it support frames of YUV420(fourcc IYUV or I420), with size of
> QCIF(176*144) CIF(352*288)?
>
> Eric Chen
>
> "haipt" wrote:
>
> > You can try KsStudio (in DDK\Tools\AVStream) & attach your filter
(driver)
> > to see the IRPs back and forth with MSN Messenger.
> > From there you could guess where things get wrong. Anyway MSN Messenger
> > requires raw frame format (e.g. RGB24), and certain frame size.
> > And if you ignore the wizard, could you still use your driver inside the
> > webcam setting?
> >
> > Hai
> >
>

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