From owner-freebsd-multimedia Mon Mar 18 10:27:47 2002 Delivered-To: freebsd-multimedia@freebsd.org Received: from smtp3.wanadoo.nl (smtp3.wanadoo.nl [194.134.35.186]) by hub.freebsd.org (Postfix) with ESMTP id 8F47737B400 for ; Mon, 18 Mar 2002 10:27:41 -0800 (PST) Received: from ams-gw.sohara.org (i1471.vwr.wanadoo.nl [194.134.213.197]) by smtp3.wanadoo.nl (8.11.3/8.11.3) with SMTP id g2IIRav11856; Mon, 18 Mar 2002 19:27:37 +0100 (MET) Date: Mon, 18 Mar 2002 19:27:31 +0100 From: "Steve O'Hara-Smith" To: Jason Andresen Cc: freebsd-multimedia@freebsd.org Subject: Re: Some video Capture questions (Was: Some audio capture questions) Message-Id: <20020318192731.179b7400.steve@sohara.org> In-Reply-To: <3C960009.FDCF003A@mitre.org> References: <20020315074048.A12682@hostwiththemost> <15506.40571.544247.899130@guru.mired.org> <20020316084125.3b2b0874.steve@sohara.org> <15507.9577.337812.353727@guru.mired.org> <20020316145438.7695fac0.steve@sohara.org> <3C960009.FDCF003A@mitre.org> X-Mailer: Sylpheed version 0.7.4 (GTK+ 1.2.10; i386-portbld-freebsd4.5) X-Face: %]+HVL}K`P8>+8ZcY-WGHP6j@&mxMo9JH6_WdgIgUGH)JX/usO0%jy7T~IVgqjumD^OBqX,Kv^-GM6mlw(fI^$"QRKyZ$?xx/ Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: owner-freebsd-multimedia@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.org On Mon, 18 Mar 2002 09:56:09 -0500 Jason Andresen wrote: JA> Steve O'Hara-Smith wrote: JA> Actually, I'm able to encode at full resolution on an AthlonXP 1700 JA> using JA> Charles Henrich's (henrich@sigbus.com) mencoder hacks and a BT878 card. JA> It's certainly feasable with modern hardware to encode good quality JA> video at full frame rate. Whoa there - this is interesting! I am having no end of trouble with those same hacks on my Athlon 1200, I have exchanged many emails with Charles Henrich and I think we are both currently baffled. It seems to be thrashing very badly somewhere and produces awful results (at half resolution). You seem to have it working properly, I would like to explore the differences. I started from mp0305cv.tgz and xvid_snapshot_21_01_2002.tar.gz, are these the same ones you have ? I've also hacked up ffmpeg to grab from bktr which does grab video nicely (at 384x288) but the sound is several seconds out of sync :( I tried this code at 768x576 and extrapolated that something around an XP1600 might just cope - it is nice to hear confirmation. JA> One strange thing about PC hardware though: I cannot dump raw YUY2 frame JA> data JA> to my HD in realtime, I have to encode the data somehow to avoid That's something like 20 Mbytes per second - few hard discs can sustain that rate, especially in face of the occasional request to do something else. -- C:>WIN | Directable Mirrors The computer obeys and wins. |A Better Way To Focus The Sun You lose and Bill collects. | licenses available - see: | http://www.sohara.org/ To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-multimedia" in the body of the message