From mboxrd@z Thu Jan  1 00:00:00 1970
Received: from int-mx08.intmail.prod.int.phx2.redhat.com
	(int-mx08.intmail.prod.int.phx2.redhat.com [10.5.11.21])
	by lists01.pubmisc.prod.ext.phx2.redhat.com (8.13.8/8.13.8) with ESMTP
	id o0BMilJx014436 for <blinux-list@listman.util.phx.redhat.com>;
	Mon, 11 Jan 2010 17:44:47 -0500
Received: from mx1.redhat.com (ext-mx09.extmail.prod.ext.phx2.redhat.com
	[10.5.110.13])
	by int-mx08.intmail.prod.int.phx2.redhat.com (8.13.8/8.13.8) with ESMTP
	id o0BMig4Z032238
	for <blinux-list@redhat.com>; Mon, 11 Jan 2010 17:44:42 -0500
Received: from dc.cis.okstate.edu (dc.cis.okstate.edu [139.78.103.93])
	by mx1.redhat.com (8.13.8/8.13.8) with ESMTP id o0BMiQaU005548
	for <blinux-list@redhat.com>; Mon, 11 Jan 2010 17:44:27 -0500
Received: from dc.cis.okstate.edu (localhost.cis.okstate.edu [127.0.0.1])
	by dc.cis.okstate.edu (8.14.2/8.13.8) with ESMTP id o0BMh9ga088982;
	Mon, 11 Jan 2010 16:43:09 -0600 (CST)
	(envelope-from martin@dc.cis.okstate.edu)
Message-Id: <201001112243.o0BMh9ga088982@dc.cis.okstate.edu>
To: Linux for blind general discussion <blinux-list@redhat.com>,
	Terry Klarich <terry@klarich.net>
Subject: Re: analyze a .wav or .mp3 file 
Date: Mon, 11 Jan 2010 16:43:09 -0600
From: Martin McCormick <martin@dc.cis.okstate.edu>
X-RedHat-Spam-Score: -2  (AWL)
X-Scanned-By: MIMEDefang 2.67 on 10.5.11.21
X-Scanned-By: MIMEDefang 2.67 on 10.5.110.13
X-loop: blinux-list@redhat.com
X-BeenThere: blinux-list@redhat.com
X-Mailman-Version: 2.1.12
Precedence: junk
Reply-To: Linux for blind general discussion <blinux-list@redhat.com>
List-Id: Linux for blind general discussion <blinux-list.redhat.com>
List-Unsubscribe: <https://www.redhat.com/mailman/options/blinux-list>,
	<mailto:blinux-list-request@redhat.com?subject=unsubscribe>
List-Archive: <https://www.redhat.com/archives/blinux-list>
List-Post: <mailto:blinux-list@redhat.com>
List-Help: <mailto:blinux-list-request@redhat.com?subject=help>
List-Subscribe: <https://www.redhat.com/mailman/listinfo/blinux-list>,
	<mailto:blinux-list-request@redhat.com?subject=subscribe>
X-List-Received-Date: Mon, 11 Jan 2010 22:44:48 -0000

Terry Klarich writes:
> I would like to see if anyone has an idea how to analyze a wav or mp3 
> file in a shell script to see if there is any audio present;
> or, it is a blank file.

My thanks to someone a couple of yers ago who suggested this
when I asked a similar question. It is slightly inaccurate as to
the time of mp3 files but it failry close.

#! /bin/sh
sox $1 -e   stat 


	I believe it will handle several formats of files.

Martin McCormick WB5AGZ  Stillwater, OK 
Systems Engineer
OSU Information Technology Department Telecommunications Services Group