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 m58D9sJo008819 for ; Sun, 8 Jun 2008 09:09:54 -0400 Received: from viefep11-int.chello.at (viefep11-int.chello.at [62.179.121.31]) by mx3.redhat.com (8.13.8/8.13.8) with ESMTP id m58D9gpD019437 for ; Sun, 8 Jun 2008 09:09:42 -0400 From: Michael Schimek To: Andy Walls In-Reply-To: <1212805718.3168.99.camel@palomino.walls.org> References: <200805262326.30501.hverkuil@xs4all.nl> <1211850976.3188.83.camel@palomino.walls.org> <200805270853.31287.hverkuil@xs4all.nl> <200805270900.20790.hverkuil@xs4all.nl> <1212791383.17465.742.camel@localhost> <1212805718.3168.99.camel@palomino.walls.org> Content-Type: text/plain; charset=ISO-8859-1 Date: Sun, 08 Jun 2008 14:27:25 +0200 Message-Id: <1212928045.17465.1044.camel@localhost> Mime-Version: 1.0 Content-Transfer-Encoding: 8bit Cc: video4linux-list@redhat.com Subject: Re: Need VIDIOC_CROPCAP clarification Reply-To: mschimek@gmx.at 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: On Fri, 2008-06-06 at 22:28 -0400, Andy Walls wrote: > On Sat, 2008-06-07 at 00:29 +0200, Michael Schimek wrote: > > > As Daniel wrote, another way to view this is that the active portion of > > the video is about 52 µs wide. At 12.27 MHz (for NTSC square pixels) one > > would sample or "crop" 638 pixels over this period. > > > Actually since the NTSC line frequency is > > Fh = 4.5 MHz/286 ~= 15.73426 kHz I know. Do I have to give three decimal places for every single video standard to explain the basic idea? ;-) Michael -- video4linux-list mailing list Unsubscribe mailto:video4linux-list-request@redhat.com?subject=unsubscribe https://www.redhat.com/mailman/listinfo/video4linux-list