From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from pigeon.gentoo.org ([208.92.234.80] helo=lists.gentoo.org) by finch.gentoo.org with esmtp (Exim 4.60) (envelope-from ) id 1R0wrx-0007gy-Pr for garchives@archives.gentoo.org; Tue, 06 Sep 2011 14:43:21 +0000 Received: from pigeon.gentoo.org (localhost [127.0.0.1]) by pigeon.gentoo.org (Postfix) with SMTP id CDBC221C187; Tue, 6 Sep 2011 14:43:07 +0000 (UTC) Received: from mail-bw0-f53.google.com (mail-bw0-f53.google.com [209.85.214.53]) by pigeon.gentoo.org (Postfix) with ESMTP id E0F8321C104 for ; Tue, 6 Sep 2011 14:42:07 +0000 (UTC) Received: by bkbzs8 with SMTP id zs8so7440776bkb.40 for ; Tue, 06 Sep 2011 07:42:07 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :content-type:content-transfer-encoding; bh=Nv4I5Nk2+Tw6bQDQc3LjXtcdXgyfH/S1OGI2GEZ2jMw=; b=Ept+vLidqY7hwHaZQW5JPE6rlXZK5JjVsuLXY10CTY+2AJHfvyt/6kreovCxroFf7x 3Tj48I5nmqB7E+bXllT461bjCrtFcAlUDuCmPWwOjDEGWyPcPa+GSCA9bnHAD+J/V7E9 r05b7vVeN9jjrMrB4oEBrnnYahgihBT7KPSsI= Precedence: bulk List-Post: List-Help: List-Unsubscribe: List-Subscribe: List-Id: Gentoo Linux mail X-BeenThere: gentoo-user@lists.gentoo.org Reply-to: gentoo-user@lists.gentoo.org MIME-Version: 1.0 Received: by 10.204.4.138 with SMTP id 10mr2981126bkr.374.1315320126990; Tue, 06 Sep 2011 07:42:06 -0700 (PDT) Received: by 10.204.134.153 with HTTP; Tue, 6 Sep 2011 07:42:06 -0700 (PDT) In-Reply-To: <20110906123454.GA29490@CasperVector> References: <20110906114857.GA7273@CasperVector> <20110906123454.GA29490@CasperVector> Date: Tue, 6 Sep 2011 10:42:06 -0400 Message-ID: Subject: Re: [gentoo-user] Re: libav/ffmpeg's bitrate options have no effect in Gentoo From: Michael Mol To: gentoo-user@lists.gentoo.org Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable X-Archives-Salt: X-Archives-Hash: 25c44f8b605d741ffef7ff62539b72eb On Tue, Sep 6, 2011 at 8:34 AM, Casper Ti. Vector wrote: > On Tue, Sep 06, 2011 at 03:09:13PM +0300, Nikos Chantziaras wrote: >> So try with avconv instead. =C2=A0But for MP3, you should probably be us= ing >> LAME with a VBR quality setting instead. > In fact I don't quite know what you mean in this sentence :| 'lame' is an MP3 encoder. VBR is 'variable bitrate', which means that high-information sections in the input stream get more bits in the output bitstream, and low-information sections in the input stream get fewer bits in the output bitstream. An encoded song might use 192Kb/s for a few seconds, and then 32Kb/s for a second, and jump up to 256Kb/s for a quarter-second before dropping down to 128Kb/s--but still sound to your ear like it was encoded at a constant bitrate of 256Kb/s. All so that audio fidelity is maintained when there's something there to actually hear. Or, more simply: * 'lame' is an MP3 encoder * 'VBR' stands for 'variable bitrate', and offers a better size/quality tradeoff scale than saying "I want 192Kb/s" --=20 :wq