From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from smtp4-g21.free.fr ([212.27.42.4]:53253 "EHLO smtp4-g21.free.fr" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756730AbZBRTTL (ORCPT ); Wed, 18 Feb 2009 14:19:11 -0500 Date: Wed, 18 Feb 2009 20:17:15 +0100 From: Jean-Francois Moine To: Thomas Kaiser , stefano.laspina@virgilio.it Cc: linux-media@vger.kernel.org Subject: Re: MR97310A and other image formats Message-ID: <20090218201715.27531333@free.fr> In-Reply-To: <499C05D8.10303@kaiser-linux.li> References: <20090217200928.1ae74819@free.fr> <499B1180.6020600@kaiser-linux.li> <20090218102553.608e026c@free.fr> <499C05D8.10303@kaiser-linux.li> Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: linux-media-owner@vger.kernel.org List-ID: On Wed, 18 Feb 2009 13:58:00 +0100 Thomas Kaiser wrote: > Hello Jean-Francois Hello Thomas and Steve, > Thanks, for the frame (or frames?). It is a full image. It is compressed: the images have different sizes, about 25 Kb. > What resolution did you use while recording this stream? I have not the webcam, it is Steve's. Looking at the image size, I think the resolution should be 640x480, but it maybe 352x288. Steve? > Can you put your USB trace somewhere on the net where I can download > it? http://moinejf.free.fr/UsbSnoop.zip > When I was guessing the streams of webcams, I used to get the sensor > into saturation -> complete white picture. So you know how the > decoded picture should look like ;-) > > Actually, it is quite easy to get a webcam sensor into saturation. > Just remove the lens of the cam an put a light in front of it. Check > in Windoz if the picture is really complete white and then record a > stream in Linux. Now, you should get a very homogeneous stream. Look > at it and .... > > I hope you got the idea? Very good idea. Steve, may you do such a trace? Cheers. -- Ken ar c'hentan | ** Breizh ha Linux atav! ** Jef | http://moinejf.free.fr/