From owner-freebsd-multimedia@FreeBSD.ORG Tue Oct 17 00:08:28 2006 Return-Path: X-Original-To: freebsd-multimedia@freebsd.org 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 40FCC16A417 for ; Tue, 17 Oct 2006 00:08:28 +0000 (UTC) (envelope-from rick@kiwi-computer.com) Received: from kiwi-computer.com (megan.kiwi-computer.com [63.224.10.3]) by mx1.FreeBSD.org (Postfix) with SMTP id CD27F43D69 for ; Tue, 17 Oct 2006 00:08:26 +0000 (GMT) (envelope-from rick@kiwi-computer.com) Received: (qmail 87487 invoked by uid 2001); 17 Oct 2006 00:08:25 -0000 Date: Mon, 16 Oct 2006 19:08:25 -0500 From: "Rick C. Petty" To: Hans Nieser Message-ID: <20061017000825.GA87349@keira.kiwi-computer.com> References: <4534156E.10809@xs4all.nl> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <4534156E.10809@xs4all.nl> User-Agent: Mutt/1.4.2.1i Cc: freebsd-multimedia@freebsd.org Subject: Re: New port: pvrxxx for Hauppauge PVR150/500 X-BeenThere: freebsd-multimedia@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list Reply-To: rick-freebsd@kiwi-computer.com List-Id: Multimedia discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 17 Oct 2006 00:08:28 -0000 On Tue, Oct 17, 2006 at 01:27:42AM +0200, Hans Nieser wrote: > > However I am having some trouble selecting different geometries. Using the > default geometry (which appears to be 720x576) there are no problems, but > with any of the others, things get stretched out, the image is clipped, > and the compression seems really high (i.e. I'm seeing huge compression > artifacts) at the 480x576 resolution. That's because the tuner needs to scale. You'll have artifacts. If you could use 360x288 I think you'd find the artifacts would disappear and the compression would drop. I'm not sure if you can use geometries that aren't in the list though... > The reason I don't just stick to the default geometry is that the > compression is too low; the captured file increases by about 1.1MB per second. Welcome to the wonderful world of MPEG-2! That's really not bad when you think about it. A 300g drive (which is cheap nowadays) could hold 77 hours of full DVD-quality video. If you're anticipating permanent storage you may wish to look at ffmpeg, mencoder, transcode, etc. and reprocess the video after it's saved. I'm actually happy that it's about 1MB/s without artifacts! -- Rick C. Petty