From owner-freebsd-multimedia@FreeBSD.ORG Mon Nov 7 09:47:46 2005 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 8487716A41F for ; Mon, 7 Nov 2005 09:47:46 +0000 (GMT) (envelope-from jakemsr@jakemsr.com) Received: from mail231.csoft.net (resin.csoft.net [63.111.22.86]) by mx1.FreeBSD.org (Postfix) with SMTP id E483943D62 for ; Mon, 7 Nov 2005 09:47:45 +0000 (GMT) (envelope-from jakemsr@jakemsr.com) Received: (qmail 18394 invoked from network); 7 Nov 2005 09:47:40 -0000 Received: from unknown (HELO puff.jakemsr.gom) (63.111.27.87) by mail231.csoft.net with SMTP; 7 Nov 2005 09:47:40 -0000 Received: (from jakemsr@jakemsr.com) by puff.jakemsr.gom (mini_sendmail/1.3.5 16nov2003); Mon, 07 Nov 2005 01:47:40 PST (sender jakemsr@puff.jakemsr.gom) Date: Mon, 7 Nov 2005 01:47:40 -0800 From: Jacob Meuser To: freebsd-multimedia@freebsd.org Message-ID: <20051107094739.GC3893@puff.jakemsr.gom> Mail-Followup-To: freebsd-multimedia@freebsd.org References: <20051106220859.52887.qmail@web30304.mail.mud.yahoo.com> <200511070309.DAA15739@sopwith.solgatos.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <200511070309.DAA15739@sopwith.solgatos.com> User-Agent: Mutt/1.4.2i Subject: Re: Sending DV to camcorder over firewire gives dropouts X-BeenThere: freebsd-multimedia@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Multimedia discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 07 Nov 2005 09:47:46 -0000 On Sun, Nov 06, 2005 at 07:09:23PM +0000, Dieter wrote: > > > Wild Guess Theory #1: > > > > > > fwcontrol -S reports: > > > > > > 3948 frames, 131.50 secs, 30.02 frames/sec > > > 784 frames, 25.92 secs, 30.24 frames/sec > > > 3597 frames, 119.78 secs, 30.03 frames/sec > > > > > > Shouldn't this be 29.97 fps ? > > > > > I like that theory: > > > > I found in ffmpeg's man page the following option: > > -r fps > > set frame rate (default = 25) > > > > Dude! Did you use the "-r" option? > > No, didn't need to, ffmpeg figured out to use 29.97 fps > all by itself, for both input and output. yes, otherwise it would not be a valid DV file. > Even if there is something wrong with the output of ffmpeg, > it would not explain why I get the exact same problem with: > > [ push "play" button on camcorder ] > fwcontrol -R filename.dv > [ push "stop" button on camcorder ] > fwcontrol -S filename.dv > > since ffmpeg is not involved in this case. > > It might be that the incorrect fps numbers reported are just > an artifact of clock resolution and the relatively short times > involved and packetization/buffering? seems likely, since the reports with more frames are closer to the right rate. --