From owner-freebsd-multimedia@FreeBSD.ORG Sat Apr 15 06:11:43 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 F037316A400 for ; Sat, 15 Apr 2006 06:11:43 +0000 (UTC) (envelope-from joe@netmusician.org) Received: from netmusician.org (netmusician.org [209.67.223.75]) by mx1.FreeBSD.org (Postfix) with ESMTP id 91D7043D45 for ; Sat, 15 Apr 2006 06:11:43 +0000 (GMT) (envelope-from joe@netmusician.org) Received: from localhost (localhost [127.0.0.1]) by netmusician.org (Postfix) with ESMTP id 1E0C67309A; Sat, 15 Apr 2006 02:11:43 -0400 (EDT) Received: from netmusician.org ([127.0.0.1]) by localhost (netmusician.org [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id 40191-04; Sat, 15 Apr 2006 02:11:42 -0400 (EDT) Received: from [192.168.0.2] (12-223-193-72.client.insightbb.com [12.223.193.72]) (using TLSv1 with cipher RC4-SHA (128/128 bits)) (No client certificate requested) by netmusician.org (Postfix) with ESMTP id 269DC73099; Sat, 15 Apr 2006 02:11:42 -0400 (EDT) In-Reply-To: <26EC8B9F-9627-4447-B20F-BF5743CBAEB8@netmusician.org> References: <20060415051014.GA20238@puff.jakemsr.gom> <26EC8B9F-9627-4447-B20F-BF5743CBAEB8@netmusician.org> Mime-Version: 1.0 (Apple Message framework v749.3) Content-Type: text/plain; charset=US-ASCII; delsp=yes; format=flowed Message-Id: <87716498-15A6-45D5-8FB2-1D4485C592A1@netmusician.org> Content-Transfer-Encoding: 7bit From: Joe Auty Date: Sat, 15 Apr 2006 02:11:43 -0400 To: Joe Auty X-Mailer: Apple Mail (2.749.3) X-Virus-Scanned: by amavisd-new at netmusician.org Cc: freebsd-multimedia@freebsd.org Subject: Re: ffmpeg question 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: Sat, 15 Apr 2006 06:11:44 -0000 Got it! This bug is fixed in ffmpeg-devel... I think I'm good now. I hope my thinking through this problem outloud on the list will be of some use to some, and not simply spam. I'll try to be quiet now =) On Apr 15, 2006, at 1:53 AM, Joe Auty wrote: > Okay, I think I figured this out.... almost: > > ffmpeg -i /dev/cxm0 -vcodec copy -acodec copy -t 20 test_ffmpeg.mpg > > > Except doing this completely ignores my -t 20 and keeps on > recording after 20 seconds... why is that? > > > On Apr 15, 2006, at 1:14 AM, Joe Auty wrote: > >> >> On Apr 15, 2006, at 1:10 AM, Jacob Meuser wrote: >> >>> On Fri, Apr 14, 2006 at 11:54:18PM -0400, Joe Auty wrote: >>>> Hello, >>>> >>>> Doing a: >>>> >>>> cat /dev/cxm0 > myvideo.mpg >>>> >>>> produces great mpeg2 video... However: >>>> >>>> ffmpeg -i /dev/cxm0 -t 10 test_ffmpeg.mpg >>>> >>>> produces 10 seconds of mpeg1 video that doesn't look as good. >>>> >>>> >>>> I've tried adding -f and -vcodec options with -s 640x480, >>>> but I just can't seem to find something that will reproduce my raw >>>> feed without errors, loss of picture, the size being off, or >>>> reverting back to mpeg1. >>>> >>>> To save me a little further time in just random trial and error, >>>> can >>>> anybody hook me up with the combination I need? >>> >>> sorry, but what exactly are you trying to do? what is lacking with >>> the cat command? >>> >>> most likely, if you are running a transcoder (like ffmpeg, mencoder >>> or transcode), it is decoding the input into raw YUV or RGB and then >>> back to MPEG. this is a lossy and time/cpu consuming process. >>> >> >> The cat command works perfectly, but I'm trying to script it, and >> since you can use ffmpeg to specify how many seconds of footage to >> capture I'm trying to make this work. >> >> According to Quicktime's Get Info, the cat files are mpeg2... I'd >> like to know the best way to preserve the same quality from the >> cat command using ffmpeg. >> >> Am I starting to make sense now? >> >> >> _______________________________________________ >> freebsd-multimedia@freebsd.org mailing list >> http://lists.freebsd.org/mailman/listinfo/freebsd-multimedia >> To unsubscribe, send any mail to "freebsd-multimedia- >> unsubscribe@freebsd.org" >