From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from mx3.redhat.com (mx3.redhat.com [172.16.48.32]) by int-mx1.corp.redhat.com (8.13.1/8.13.1) with ESMTP id m65JoXA5027302 for ; Sat, 5 Jul 2008 15:50:33 -0400 Received: from smtp6.versatel.nl (smtp6.versatel.nl [62.58.50.97]) by mx3.redhat.com (8.13.8/8.13.8) with ESMTP id m65JoIH0030467 for ; Sat, 5 Jul 2008 15:50:19 -0400 Message-ID: <486FD209.5020709@hhs.nl> Date: Sat, 05 Jul 2008 21:56:57 +0200 From: Hans de Goede MIME-Version: 1.0 To: Thomas Kaiser References: <486E023A.6010801@hhs.nl> <486E0D71.9020106@kaiser-linux.li> In-Reply-To: <486E0D71.9020106@kaiser-linux.li> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Cc: video4linux-list@redhat.com, "bertrik@sikken.nl >> Bertrik Sikken" Subject: Re: PATCH: gspca-pac207-fix-daylight-frame-decode-errors.patch List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: video4linux-list-bounces@redhat.com Errors-To: video4linux-list-bounces@redhat.com List-ID: Thomas Kaiser wrote: > Hans de Goede wrote: >> The proper fix for this would be to lower the compression balance >> setting when >> in 352x288 mode. The problem with this is that when the compression >> balance >> gets lowered below 0x80, the pac207 starts using a different compression >> algorithm for some lines, these lines get prefixed with a 0x2dd2 prefix >> and currently we do not know how to decompress these lines, so for now >> we use a minimum exposure value of 5 > Hello Hans > > Can you post some frames with a lower compression balance, please? Then > other people can take a look at the decoding ;-) > Done, if you go here: http://people.atrpms.net/~hdegoede/ You will see about 20 imgXX.raw's, which are pac207 compressed bayer images, including lines starting with the 0x2dd2 prefix. When decoded they should show a hand (mine) at the top of the screen holding a lucky lucky comic in front of the cam. Note this is not me being shy, but I needed a high contrast image which was hard to compress to trigger the bug :) Regards, Hans -- video4linux-list mailing list Unsubscribe mailto:video4linux-list-request@redhat.com?subject=unsubscribe https://www.redhat.com/mailman/listinfo/video4linux-list