From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from ffbox0-bg.mplayerhq.hu (ffbox0-bg.ffmpeg.org [79.124.17.100]) by master.gitmailbox.com (Postfix) with ESMTP id 5F24B47E90 for ; Mon, 30 Oct 2023 01:22:39 +0000 (UTC) Received: from [127.0.1.1] (localhost [127.0.0.1]) by ffbox0-bg.mplayerhq.hu (Postfix) with ESMTP id 15B2968CCAF; Mon, 30 Oct 2023 03:22:37 +0200 (EET) Received: from w4.tutanota.de (w4.tutanota.de [81.3.6.165]) by ffbox0-bg.mplayerhq.hu (Postfix) with ESMTPS id 4E2F6689BA8 for ; Mon, 30 Oct 2023 03:22:30 +0200 (EET) Received: from tutadb.w10.tutanota.de (unknown [192.168.1.10]) by w4.tutanota.de (Postfix) with ESMTP id E27191060160 for ; Mon, 30 Oct 2023 01:22:29 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; t=1698628948; s=s1; d=lynne.ee; h=From:From:To:To:Subject:Subject:Content-Description:Content-ID:Content-Type:Content-Type:Content-Transfer-Encoding:Content-Transfer-Encoding:Cc:Date:Date:In-Reply-To:In-Reply-To:MIME-Version:MIME-Version:Message-ID:Message-ID:Reply-To:References:References:Sender; bh=/vYo3BJHvfoUuefnROJLcJOkC4pU0a20t3BWZpo9AAo=; b=RQLHsz0TQ6rCloIKNuJaRyl0xq9Ts+0qh5huWohiBDCeSjsNZ8e2310yuFXWg7Vj E/KD9QowKwtuwYbciBaHkjI1FGD3htj/Oeo/lQK0b/DDw9To7IUOzODGKX2QYPqB7tL bTFQmWL3xczc9AcHpXbj+WiEuUOiPtMfUsaeYgLIA/kaXYtB/lznN0uZyYP55rFBFBj C38Tnye5EfOIvT1DWY9Dd/b3oJzb4KOqgoMCgfPW7wTV1pSvkWKb7+N4wJyYNE/sIkP EBgsPkT3qU1PnXFcB64u5ShWOtPCUbExQRV/aoWGYv66ihIWHoThzgmenVkn3ziiSaT V4APEy/1BQ== Date: Mon, 30 Oct 2023 02:22:28 +0100 (CET) From: Lynne To: FFmpeg development discussions and patches Message-ID: In-Reply-To: References: MIME-Version: 1.0 Subject: Re: [FFmpeg-devel] [PATCH] libavcodec/mpeg12: Remove "fast" mode X-BeenThere: ffmpeg-devel@ffmpeg.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: FFmpeg development discussions and patches List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Reply-To: FFmpeg development discussions and patches Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: ffmpeg-devel-bounces@ffmpeg.org Sender: "ffmpeg-devel" Archived-At: List-Archive: List-Post: Oct 30, 2023, 01:02 by leo.izen@gmail.com: > On 10/29/23 11:48, Lynne wrote: > >> Oct 29, 2023, 16:43 by kierank@obe.tv: >> >>> $subj as discussed at VDD >>> >>> Kieran >>> >> >> This isn't Opus or JPEG-XL, there should be a single correct way of decoding something. >> Looks good to me. >> _______________________________________________ >> > > I'm not sure I understand what you mean - JPEG XL is fully specified. Are you thinking of mjpeg? > Anything that does not have a decoder fully defined with fixed-point math or at least does not define a specific floating point format, with all constants being given in that float format unambiguously (e.g. regular IEEE 32-bit floats, with all constant values being given as 32-bit hex), along with a defined and bitexact mathematical operations (i.e. IEEE). Giving only float constants up to a reasonable decimal point and defining a maximum error is just not how video codecs are defined. Yeah, compared to Opus, JPEG-XL is really ordinary and shouldn't have been there, and it can be argued that the error margins are small enough to permit bitexactness up to a bit depth, but I nevertheless would've liked to see fixed-point specifications. _______________________________________________ ffmpeg-devel mailing list ffmpeg-devel@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-devel To unsubscribe, visit link above, or email ffmpeg-devel-request@ffmpeg.org with subject "unsubscribe".