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 1R0x6l-00029m-CX for garchives@archives.gentoo.org; Tue, 06 Sep 2011 14:58:39 +0000 Received: from pigeon.gentoo.org (localhost [127.0.0.1]) by pigeon.gentoo.org (Postfix) with SMTP id C640321C1C2; Tue, 6 Sep 2011 14:58:25 +0000 (UTC) Received: from mail-gy0-f181.google.com (mail-gy0-f181.google.com [209.85.160.181]) by pigeon.gentoo.org (Postfix) with ESMTP id 24CD521C1A9 for ; Tue, 6 Sep 2011 14:56:51 +0000 (UTC) Received: by gyg8 with SMTP id 8so5001174gyg.40 for ; Tue, 06 Sep 2011 07:56:51 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=date:from:to:subject:message-id:references:mime-version :content-type:content-disposition:in-reply-to:user-agent; bh=BCUGrHlmCLw+iWTW//swYFO58jDSnUPnvr201yn2Ca4=; b=Mgxw0HeGJamButHI5fp9c+LL0EvlFDltBB3t8e37390nvIa/rtwZr7LV8mXWzmuDM/ KQmt5fD+5CnWgjPeb/+myLU+cSUAXinWdOrVRwiSSWO0DEpWrD59iVVzHXJNxckmfGWW wEpvoqPbD0CJ77U1HAZlghXDB6nTSKVjI2s38= Received: by 10.68.21.201 with SMTP id x9mr7376408pbe.328.1315321011246; Tue, 06 Sep 2011 07:56:51 -0700 (PDT) Received: from localhost ([2001:da8:201:1037:222:15ff:fe08:c0ae]) by mx.google.com with ESMTPS id u10sm700373pbr.12.2011.09.06.07.56.49 (version=TLSv1/SSLv3 cipher=OTHER); Tue, 06 Sep 2011 07:56:50 -0700 (PDT) Date: Tue, 6 Sep 2011 22:56:47 +0800 From: "Casper Ti. Vector" To: gentoo-user@lists.gentoo.org Subject: Re: [gentoo-user] Re: libav/ffmpeg's bitrate options have no effect in Gentoo Message-ID: <20110906145647.GA30823@CasperVector> References: <20110906114857.GA7273@CasperVector> <20110906123454.GA29490@CasperVector> 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 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="OgqxwSJOaUobr8KG" Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.5.21 (2010-09-15) X-Archives-Salt: X-Archives-Hash: 7b13795cad410b85d5bff6a03580aa31 --OgqxwSJOaUobr8KG Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: quoted-printable But VBR seems to be disabled with the command line I used... And, whether VBR is enabled, the wrong parsing of the argument of bitrate options indicate that some error must exist somewhere. On Tue, Sep 06, 2011 at 10:42:06AM -0400, Michael Mol wrote: > '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. >=20 > 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" Thanks, I understand what LAME and VBR is, but was just mistook the idea of the original sentence as "use the `lame' program instead of `ffmpeg' or `libav'" :] --=20 Using GPG/PGP? Please get my current public key (ID: 0xAEF6A134, valid from 2010 to 2013) from a key server. --OgqxwSJOaUobr8KG Content-Type: application/pgp-signature; name="signature.asc" Content-Description: Digital signature -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.18 (GNU/Linux) iEYEARECAAYFAk5mNK8ACgkQOM4F1K72oTQ/vQCfWcjLUySsK0AXtmHKgsvv0lHh TDkAoIuTfZ/uGmrTU2V5CqZod63tJHq3 =/BLV -----END PGP SIGNATURE----- --OgqxwSJOaUobr8KG--