From owner-freebsd-multimedia@FreeBSD.ORG Mon Feb 7 10:04:13 2005 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 9A7D816A4DA for ; Mon, 7 Feb 2005 10:04:13 +0000 (GMT) Received: from sohara.org (sohara.org [192.220.64.179]) by mx1.FreeBSD.org (Postfix) with ESMTP id 4971243D41 for ; Mon, 7 Feb 2005 10:04:13 +0000 (GMT) (envelope-from steve@sohara.org) Received: (qmail 54086 invoked by uid 16563); 7 Feb 2005 10:04:12 -0000 Received: from unknown (HELO SOHARA) ([217.12.14.195]) (envelope-sender ) by 192.220.64.179 (qmail-ldap-1.03) with SMTP for ; 7 Feb 2005 10:04:12 -0000 Date: Mon, 7 Feb 2005 10:05:21 +0000 From: Steve O'Hara-Smith To: freebsd-multimedia@freebsd.org Message-Id: <20050207100521.544ed9bc.steve@sohara.org> In-Reply-To: <20050207032841.GA33816@it.ca> References: <20050207032841.GA33816@it.ca> X-Mailer: Sylpheed version 0.9.99-gtk2-20041024 (GTK+ 2.4.1; i586-pc-interix3) 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 Subject: Re: ffmpeg at half speed ... sort of. X-BeenThere: freebsd-multimedia@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list List-Id: Multimedia discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 07 Feb 2005 10:04:13 -0000 On Sun, 6 Feb 2005 22:28:41 -0500 Paul Chvostek wrote: > > This is weird. When I encode with ffmpeg, the resultant file appears to > play back at about half the expected framerate, with the wrong bitrate. > > I encode with ffmpeg: > > encode$ ffmpeg -y -an -vd /dev/bktr0 -s 160-120 -tvstd ntsc \ > -vcodec mpeg4 -b 50 -f avi -t 15 -r 29.97 test.avi -b 50 is a video bandwidth of 50 Kbit/s which is rather low, try leaving it out (to get the default 200 Kbit/s) or setting it higher. It may well be that ffmpeg isn't achieving as much compression as you had been hoping for. Also what sort of CPU are you using ? -- C:>WIN | Directable Mirror Arrays The computer obeys and wins. | A better way to focus the sun You lose and Bill collects. | licences available see | http://www.sohara.org/