From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from smtp3-g21.free.fr ([212.27.42.3]:46516 "EHLO smtp3-g21.free.fr" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751103AbZIMHUW (ORCPT ); Sun, 13 Sep 2009 03:20:22 -0400 Date: Sun, 13 Sep 2009 09:20:15 +0200 From: Jean-Francois Moine To: =?ISO-8859-1?Q?N=E9meth_M=E1rton?= Cc: Thomas Kaiser , V4L Mailing List , leandro Costantino , Hans de Goede Subject: Re: image quality of Labtec Webcam 2200 Message-ID: <20090913092015.485fdbcd@tele> In-Reply-To: <4AA9F7A0.5080802@freemail.hu> References: <4AA9F7A0.5080802@freemail.hu> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 8bit Sender: linux-media-owner@vger.kernel.org List-ID: On Fri, 11 Sep 2009 09:09:20 +0200 Németh Márton wrote: > You can find my results at > http://v4l-test.sourceforge.net/results/test-20090911/index.html > There are three types of problems: a) Sometimes the picture contains > a 8x8 pixel error, like in image #9 > http://v4l-test.sourceforge.net/results/test-20090911/index.html#img00009 > b) Sometimes the brightness of the half picture is changed, like in > images #7, #36 and #37 > http://v4l-test.sourceforge.net/results/test-20090911/index.html#img00007 > http://v4l-test.sourceforge.net/results/test-20090911/index.html#img00036 > http://v4l-test.sourceforge.net/results/test-20090911/index.html#img00037 > c) Sometimes the libv4l cannot convert the raw image and the errno is > set to EAGAIN (11), for example image #1, #2 and #3 > > Do you know how can I fix these problems? The error EAGAIN is normal when decoding pac7311 images, because they are rotated 90°. But this error should occur one time only. I looked at the raw image #1, and it seems that there are JPEG errors inside (sequences ff ff). There should be a problem in the pac7311 driver. Hans, may you confirm? -- Ken ar c'hentań | ** Breizh ha Linux atav! ** Jef | http://moinejf.free.fr/