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 m53LnnHP006866 for ; Tue, 3 Jun 2008 17:49:49 -0400 Received: from mail.gmx.net (mail.gmx.net [213.165.64.20]) by mx3.redhat.com (8.13.8/8.13.8) with SMTP id m53Lnb5w022553 for ; Tue, 3 Jun 2008 17:49:37 -0400 Date: Tue, 3 Jun 2008 23:49:18 +0200 From: Daniel =?iso-8859-1?Q?Gl=F6ckner?= To: Sam Logen Message-ID: <20080603214917.GA596@daniel.bse> References: <986038.14508.qm@web35602.mail.mud.yahoo.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <986038.14508.qm@web35602.mail.mud.yahoo.com> Cc: video4linux-list@redhat.com Subject: Re: Question - Component input via software card 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 Tue, Jun 03, 2008 at 01:55:07PM -0700, Sam Logen wrote: > Now, software capture cards collect raw information > from their video and audio composite jacks, right? Some capture cards can collect raw information. > Then the software processes these streams into a file. No, drivers make the card process the raw data for normal use. This is too much to be done in software. > Would it be possible to connect component cables from > a high def. video source to the video and audio > composite plugs of the capture card, and have a > program process the three streams together as video > streams instead of video and audio streams, then save > the result in a file? Baseband audio inputs are usually sampled at a much lower frequency than video inputs. And if audio is not input as baseband signal, there is only one ADC. > Or would the hardware on the capture card filter out > anything it would not perceive as audio? In baseband audio there may be an analog low pass filter corresponding to the low sampling rate. I don't know any chip that captures raw modulated audio. But on the other hand I don't know that many chips. > I'm not taking into consideration processing power or > hard drive access bottlenecks, or other hardware > limitations beyond the capture card. It is a bit difficult to consider the limitations of an unknown capture card. Daniel -- video4linux-list mailing list Unsubscribe mailto:video4linux-list-request@redhat.com?subject=unsubscribe https://www.redhat.com/mailman/listinfo/video4linux-list