From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from lists.gentoo.org (pigeon.gentoo.org [208.92.234.80]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by finch.gentoo.org (Postfix) with ESMTPS id 59A3C1382C5 for ; Mon, 4 Jan 2021 21:37:54 +0000 (UTC) Received: from pigeon.gentoo.org (localhost [127.0.0.1]) by pigeon.gentoo.org (Postfix) with SMTP id E8821E09B1; Mon, 4 Jan 2021 21:37:49 +0000 (UTC) Received: from mout.gmx.net (mout.gmx.net [212.227.15.15]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by pigeon.gentoo.org (Postfix) with ESMTPS id 46805E08E8 for ; Mon, 4 Jan 2021 21:37:49 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=gmx.net; s=badeba3b8450; t=1609796256; bh=VXzEHta1/JrRyltIUOxeXWxAMz+dIAcBGbNj5WsF+EY=; h=X-UI-Sender-Class:Date:From:To:Subject; b=dWxfCOEMxlvJ9PR7c7t34A/USUp+NZeBukHz8WUC4vjVprJCMBuXvamkExJPyviDL NQC1FJjKI2LwsI66mw1EyBtdbCIk4BoCN8SS7bhNI02f7x8eqhJzyS+CVvXJamkg9D 1k6x4v5Nhoe2WeBEr0ry8S6UCO+0KbDAZDuxYAjo= X-UI-Sender-Class: 01bb95c1-4bf8-414a-932a-4f6e2808ef9c Received: from kern ([92.117.59.43]) by mail.gmx.com (mrgmx004 [212.227.17.190]) with ESMTPSA (Nemesis) id 1MHXFr-1kj7PF39k1-00DXBL for ; Mon, 04 Jan 2021 22:37:36 +0100 Date: Mon, 4 Jan 2021 22:37:34 +0100 From: Frank Steinmetzger To: gentoo-user@lists.gentoo.org Subject: [gentoo-user] Your opinion on jpeg encoders, please Message-ID: Mail-Followup-To: gentoo-user@lists.gentoo.org 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 X-Auto-Response-Suppress: DR, RN, NRN, OOF, AutoReply MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha512; protocol="application/pgp-signature"; boundary="WbLJ2qv3lkZgOdWT" Content-Disposition: inline User-Agent: Mutt 2.0.3; VIM - Vi IMproved 8.2 X-Provags-ID: V03:K1:+uhUKqrpxSbO7StXO5gw7U62ryJvvE7OHKUdhSZXoEZCKJ1nTQU sYlRFn3130Z4oDuHXlrMg521JlJwSpz/QnEaP0gJztRabv6SOgPugov/niRE90JOZmyZ5hP kHgwQcsBUdqK5TuQVGIhqekltRfKJPe4kZJH/DRU6m4ZoVoqpwAPCgTKg8TETP8R5lqUmYs ohxTwWalL4HuOB1/oEeCA== X-Spam-Flag: NO X-UI-Out-Filterresults: notjunk:1;V03:K0:fsl038FkQEw=:4NoLQ8rcdXDDjEAk7Y5Euk mGw4bXuVIMyYBrYnk+UqbKTIbSMuG4VUbFYB9e52TACPf4zTdpdo6ICvpt/uyRAel2LUcjqbI JUXFepIXXeK0iLJGRluhoTxecjKEVxQlDyq8vYgwe4PO43bszQlpAt+pTsPTANm9cBR0cH4fz L2ICxaxLPWZkZoUazvMXFYF3A9SsurNLGBX3QYJgyh0od/oFth0sJxp/1FuvNTo67Ndz4l91r 4yQc+sATY5jzeZ4omeBQlO9DSKNmkgyL+f0EKVlMhUE6Rnghu0wpGlQk7Y/g61NKhW5qLHCTu Js1A851dKhBrdevQ8NhXYulKLWRoddqRexNYHgBgqVNxGDZYzNH6cdqbM0bBaIiREZ7TcpIny kmMyKXaNl0u5V13wKSqbhPyt5nC6BuWfyjeMLgUKZV12FDb2W8SZK1/GZmA+ED5YnDQmvaPVx j0h/evMXyS/6x8qzeScsj+nZJdAIq8wBHQnNzTiVRzdDf0NroBQ2Lq2aQx4EsRFE8XilN3vZv pRU6kAjx4gIK7OLJeJ1WPuAfymZqjNJ/Q8dHpDdNSl9OPElxxKRy+sW/sopsa0N1C8guiwHpt RPbrror7z/yXvXcaHNbhuoMBHY67MvXYDIUKj7+fzbPBYT6+klUlvNsN5cOdOkq0VaeiPqNo4 HuU4kp7YJOT030oo3vWHvefoGw0CuwEfeuxqF8pG7C201CvI5uDOIhBGjRDU1LFeBb1duH+qx KtsVgw1ugIYHen84NVQeFXwfaIJtuEP5mVm1VGTZL7Eb//7mXOb+FTlV8YjPzHC6QhrRiFnve a4ekO84w6YMwKYgPOeGgDWFYI3BNlCJ3ziRPtDPUlnmqyoUplghXCPuL0xMrDcYj4e9JuUbOJ GN+yBwwdDCHI0tCwWQTQ== X-Archives-Salt: f5a558e5-1a4b-49ea-a319-c26cbe789a14 X-Archives-Hash: 8a11e1ca738e543eafb9ecf11cf0ad98 --WbLJ2qv3lkZgOdWT Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: quoted-printable Hi all, this is not really a Gentoo-specific question, but some of you know your way around stuff, so here goes. When I edit photos, I like to shrink and recompress them to save on space, but not mangle them too much in the process to lose quality. So for average images I tend to use a quality setting between 80 and 86, very bad shots such as defocussed or blurred ones just 70. And for the really good ones (crystal sharp, portraits, extraordinary motives etc) 90 and more. In the far past I=E2=80=99ve been using Gimp, but for some years now mostly= Showfoto (the editor from Digikam) due to its more useful photo enhancement features. However I noticed that the latter procuces larger files for the same quality setting. So currently, I first save with a very high setting from Showfoto and then recompress the whole directory in a one-line-loop using imagemagick=E2=80=99s convert. I have the impression that it produces far s= maller files at the same visual quality. Now I know that one can=E2=80=99t fully compare quality settings of differe= nt encoders, but it started me wondering: which is really =E2=80=9Cbetter=E2= =80=9D? Or maybe just a little more enhanced, or up-to-date from an algorithmic standpoint? Just because many distros and tools use libjpeg, that doesn=E2=80=99t mean = it=E2=80=99s the best one out there. Gimp, showfoto and convert use different encoders, because compressing the same PNG with the same JPEG setting does not result in three identical files. Does any of you have an opinion on that matter? Cheers. --=20 Gru=C3=9F | Greetings | Qapla=E2=80=99 Please do not share anything from, with or about me on any social network. What do you call a man with a seagull on his head? =E2=80=93 Cliff. --WbLJ2qv3lkZgOdWT Content-Type: application/pgp-signature; name="signature.asc" -----BEGIN PGP SIGNATURE----- iQIzBAABCgAdFiEEVbE9o2D2lE5fhoVsizG+tUDUMMoFAl/zipsACgkQizG+tUDU MMpPnRAAxDsT/IzZo4F3HBd9rb1m3wt2tXJ0DR81296jc8hRdT0TJNn89LCjVWoO ijXDB52Fm6NSoVex2n8UGF/VZ8jKidyh/mYP9JTYAQho1vzySQmV47uSvWET6cmi zX1vYtSbYtuOopJKOXb4oktOe/AnM1LM3boXRS1OrMumyjuxVVDyv4uLwrQX+yTz vpTnz7NoAk6B6Sn4FVzIZmyinZ+TDGEg+zCDbsjlCBJfSa4chwDI2hA+6wteyWTM 3+TaVAbkMtyfHTDBIddUjalJo8SsRW7dUSm6Zwgr5FSMoXmZAzrNW3Waj9MTQHtQ wSwxkydzlVUSaky8IIfC9s+1pa046/A39B2tApfbXzKSDD6R/CNX2cTGA8wvSFcA Fx5gfKRnmRVA7OyMcqkhyoRwoFxxcPNQeDJztoXpKN/nmP36prp0FbV6g27gZle6 BHWk8TB9hNiDkfNTACtl1vppQv8qMdwLd5EqvU5sf3jPBZHQoWPE0hQKIVzkjP1z BOuJ86rjCfOprlNXFcpYf+LajhCbxyaYM/7zbmU5bwRYjpF1PiETuQy6pRjOcEWn guHDabytH9tDdbkLV4ye7urjLgUvdoEaglRpmUGkcl3Zql3yVxnn/ycMVW7bfSF+ ovyYPgX+cRM+denDyhNRQCm1eljoGhl6BtTHqRnqLhh0vHuYxkI= =9vDT -----END PGP SIGNATURE----- --WbLJ2qv3lkZgOdWT--