Return-Path: X-Original-To: cellar@ietfa.amsl.com Delivered-To: cellar@ietfa.amsl.com Received: from localhost (ietfa.amsl.com [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 5B6171A92B5 for ; Thu, 7 Jan 2016 10:37:10 -0800 (PST) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -1.033 X-Spam-Level: X-Spam-Status: No, score=-1.033 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, RCVD_IN_DNSWL_LOW=-0.7, SPF_PASS=-0.001, XPRIO=1.568] autolearn=no Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id 3IAb9XL68j3R for ; Thu, 7 Jan 2016 10:37:09 -0800 (PST) Received: from smtp-sh2.infomaniak.ch (smtp-sh2.infomaniak.ch [128.65.195.6]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id B2CC91A92B4 for ; Thu, 7 Jan 2016 10:37:08 -0800 (PST) Received: from smtp3.infomaniak.ch (smtp3.infomaniak.ch [84.16.68.91]) by smtp-sh.infomaniak.ch (8.14.5/8.14.5) with ESMTP id u07Ib6CT032261 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=FAIL) for ; Thu, 7 Jan 2016 19:37:06 +0100 Received: from Castor.local (85-218-38-132.dclient.lsne.ch [85.218.38.132]) (authenticated bits=0) by smtp3.infomaniak.ch (8.14.5/8.14.5) with ESMTP id u07Ib5nB023595 for ; Thu, 7 Jan 2016 19:37:06 +0100 Date: Thu, 7 Jan 2016 19:37:06 +0100 From: Reto Kromer To: cellar@ietf.org X-Priority: 3 Message-ID: MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable X-Mailer: Mailsmith 2.4 (470) X-Antivirus: Dr.Web (R) for Unix mail servers drweb plugin ver.6.0.2.8 X-Antivirus-Code: 0x100000 Archived-At: Subject: [Cellar] Fwd: Re: FFV1 Version 4 X-BeenThere: cellar@ietf.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: Codec Encoding for LossLess Archiving and Realtime transmission List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 07 Jan 2016 18:37:10 -0000 Sadly, there are around a lot of coding schemes: - power function (=3D gamma function) encoded BT. 709, sRGB, CineGamma, "FILM REC", HyperGamma - log RGB (=3D "quasi-log", sometimes also called "pseudo- log") encodings: FilmStream (log60), ARRI log F, Panalog, Sony-log (=3D S-log), REDLOG, SI log90 - log neg encodings: Cineon printing density (CPD), "DPX", ARRI log C Hope this helps, Reto =3D=3D=3D=3D=3D=3D Forwarded Message =3D=3D=3D=3D=3D=3D Date: 7.1.2016-01-07 19:19 CET =46rom: Reto Kromer To: cellar@ietf.org Peter B. wrote: >I'm not too experienced with non-linear color encoding, but >in a recent presentation by Reto Kromer, he mentioned that >"logarithmic" often just means "logarithmic-ish". It's usually called quasi-log. Apart from the toe and shoulder region, the curve is non-linear, yet no clear provision is made for foot-room and head-room. Best regards, Reto AV Preservation by reto.ch chemin du Suchet 5 | 1024 Ecublens | Switzerland Web: http://reto.ch | Twitter: @retoch _______________________________________________ Cellar mailing list Cellar@ietf.org https://www.ietf.org/mailman/listinfo/cellar =3D=3D=3D=3D=3D=3D End Forwarded Message =3D=3D=3D=3D=3D=3D