From owner-freebsd-multimedia@FreeBSD.ORG Fri Jul 11 13:29:46 2003 Return-Path: Delivered-To: freebsd-multimedia@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 1646537B401 for ; Fri, 11 Jul 2003 13:29:46 -0700 (PDT) Received: from mail.cyberonic.com (mail.cyberonic.com [4.17.179.4]) by mx1.FreeBSD.org (Postfix) with ESMTP id 24EAD43F75 for ; Fri, 11 Jul 2003 13:29:45 -0700 (PDT) (envelope-from jmg@hydrogen.funkthat.com) Received: from hydrogen.funkthat.com (node-40244c0a.sfo.onnet.us.uu.net [64.36.76.10]) by mail.cyberonic.com (8.12.8/8.12.5) with ESMTP id h6BKtOcU013529; Fri, 11 Jul 2003 16:55:25 -0400 Received: (from jmg@localhost) by hydrogen.funkthat.com (8.12.9/8.11.6) id h6BKTF6V057317; Fri, 11 Jul 2003 13:29:15 -0700 (PDT) (envelope-from jmg) Date: Fri, 11 Jul 2003 13:29:15 -0700 From: John-Mark Gurney To: Julian Elischer Message-ID: <20030711202915.GL35337@funkthat.com> Mail-Followup-To: Julian Elischer , Alexander Leidinger , Sean_Welch@alum.wofford.org, multimedia@freebsd.org References: <20030711220709.3cdac33e.Alexander@Leidinger.net> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.4.1i X-Operating-System: FreeBSD 4.2-RELEASE i386 X-PGP-Fingerprint: B7 EC EF F8 AE ED A7 31 96 7A 22 B3 D8 56 36 F4 X-Files: The truth is out there X-URL: http://resnet.uoregon.edu/~gurney_j/ X-Resume: http://resnet.uoregon.edu/~gurney_j/resume.html cc: Alexander Leidinger cc: Sean_Welch@alum.wofford.org cc: multimedia@freebsd.org Subject: Re: BSD video capture emulation question X-BeenThere: freebsd-multimedia@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list Reply-To: John-Mark Gurney List-Id: Multimedia discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 11 Jul 2003 20:29:46 -0000 Julian Elischer wrote this message on Fri, Jul 11, 2003 at 13:18 -0700: > On Fri, 11 Jul 2003, Alexander Leidinger wrote: > > > On Fri, 11 Jul 2003 10:28:28 -0700 > > John-Mark Gurney wrote: > > > > Think about those cards where you can put a video stream in and get a > > transformed video stream out (MPEG encoder). One end can be represented > > as a video sink and the other one as a video source (so you don't need a > > "filter", just connect sources with sinks). > > sounds like netgraph .. (runs for cover) Heheh, the scary part is you aren't too far off basis with that comment. :) Some of the newer Windows apps lets you do similar things with audio and video stream processing. I haven't used it, but there is an app that lets you plum things together. So say you have a VOB (mpeg-2) video stream, and that will export the MPEG-2 video data, and the subtitls and the audio. Then you can pass the audio (AC3) data to either your sound card (assuming digital out) or to a software AC3 decoder, and you can do similar things with video. Another reason I choose to use a userland for the prgoram API is that we can later refactor the code between userland and kernel w/o breaking programs. (or did I already state that? :) ) -- John-Mark Gurney Voice: +1 415 225 5579 "All that I will do, has been done, All that I have, has not."