From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from ffbox0-bg.ffmpeg.org (ffbox0-bg.ffmpeg.org [79.124.17.100]) by master.gitmailbox.com (Postfix) with ESMTPS id 5BB654C38C for ; Sat, 2 Aug 2025 09:41:10 +0000 (UTC) Received: from [127.0.1.1] (localhost [127.0.0.1]) by ffbox0-bg.ffmpeg.org (Postfix) with ESMTP id 083B1687DAB; Sat, 2 Aug 2025 12:41:01 +0300 (EEST) Received: from nef.ens.fr (nef2.ens.fr [129.199.96.40]) by ffbox0-bg.ffmpeg.org (Postfix) with ESMTPS id EB4F5687DAB for ; Sat, 2 Aug 2025 12:40:54 +0300 (EEST) X-ENS-nef-client: 129.199.129.80 ( name = phare.normalesup.org ) Received: from phare.normalesup.org (phare.normalesup.org [129.199.129.80]) by nef.ens.fr (8.14.4/1.01.28121999) with ESMTP id 5729esJF007578 for ; Sat, 2 Aug 2025 11:40:54 +0200 Received: by phare.normalesup.org (Postfix, from userid 1001) id 38B772EFE3; Sat, 2 Aug 2025 11:40:54 +0200 (CEST) Date: Sat, 2 Aug 2025 11:40:54 +0200 From: Nicolas George To: FFmpeg development discussions and patches Message-ID: References: <20250723135626.1390296-1-ffmpeg@haasn.xyz> <20250723171838.GB1401694@haasn.xyz> <20250724131154.GB95314@haasn.xyz> <20250724225800.GB34906@haasn.xyz> <20250729105549.GB5455@haasn.xyz> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <20250729105549.GB5455@haasn.xyz> X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.4.3 (nef.ens.fr [129.199.96.32]); Sat, 02 Aug 2025 11:40:54 +0200 (CEST) Subject: Re: [FFmpeg-devel] Again pre-multiplied alpha 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="utf-8" Content-Transfer-Encoding: base64 Errors-To: ffmpeg-devel-bounces@ffmpeg.org Sender: "ffmpeg-devel" Archived-At: List-Archive: List-Post: TmlrbGFzIEhhYXMgKEhFMTIwMjUtMDctMjkpOgo+IEkgdGhpbmsgdGhpcyB3b3VsZCBpbnZvbHZl IG1vcmUgaW52YXNpdmUgY2hhbmdlcyAoaS5lLiBhZGRpbmcgbmVnb3RpYXRpb24gdG8KPiB0aGUg YXZmaWx0ZXIgY29kZSBmb3IgdGhpcyBhbmQgaWRlYWxseSBvdGhlciBwcm9wZXJ0aWVzKSB0aGF0 IHlvdSBhbmQgSSBib3RoCj4gYWdyZWVkIGlzIG91dCBvZiBzY29wZSBvZiB0aGlzIHNlcmllcy4K Ck5vIGl0IGRvZXMgbm90LiBZb3UganVzdCBuZWVkIHRvIGFkZCBhIGZsYWcg4oCcdGhpcyBmaWx0 ZXIgc3VwcG9ydHMKcHJlbXVsdGlwbGllZCBhbHBoYeKAnSBhbmQgaGF2ZSB0aGUgZnJhbWV3b3Jr IHRocm93IGFuIGVycm9yIGlmIHRoZSBmbGFnCmlzIG5vdCBzZXQuCgpXZSBjYW4gbGF0ZXIgdXNl IHRoZSBmbGFnIGZvciBuZWdvdGlhdGlvbiBvciByZXBsYWNlIGl0IHdpdGggc29tZXRoaW5nCmVs c2UsIGFzIGl0IGlzIHB1cmVseSBpbnRlcm5hbCBBUEkuCgo+IElmIGl0IG1ha2VzIHlvdSBmZWVs IGJldHRlciwgSSBjb3VsZCBhZGQgYW4gZXJyb3IgbWVzc2FnZSB0byB0aGUgc3RhY2tpbmcKPiBm aWx0ZXJzIHNwZWNpZmljYWxseSwgZm9yIG5vdz8KCkRvIHlvdSByZWFsbHkgdGhpbmsgdGhlIHN0 YWNraW5nIGZpbHRlcnMgYXJlIHRoZSBvbmx5IG9uZXMgd2hlcmUgdGhlCnByb2JsZW0gY2FuIGhh cHBlbj8KCj4gWW91IGFyZ3VlIHRoYXQgcHJlbXVsdGlwbGllZCBmcmFtZXMgd2VyZSBhbiAiYW5l Y2RvdGFsIGV4cGVyaW1lbnRhbCBmZWF0dXJlIgo+IG9ubHkgdXAgdW50aWwgdGhpcyBzZXJpZXMs IGJ1dCB0aGlzIGlzIGZsYXQgb3V0IHVudHJ1ZTsgYmVjYXVzZSB0aGlzIHNlcmllcwo+IGRvZXMg bm90IGNoYW5nZSBob3cgZmlsZXMgYXJlIGRlY29kZWQuIEluIGV2ZXJ5IHNjZW5hcmlvIHRoYXQg eW91IHdvcnJ5IGFib3V0Cj4gbm93IGdldHRpbmcgdGhlIHdyb25nIHJlc3VsdCwgeW91IHdvdWxk IGhhdmUgZ290dGVuIHRoZSB3cm9uZyByZXN1bHQgZXZlbgo+IGJlZm9yZSBteSBjaGFuZ2VzLgoK VGhhdCBpcyB0aGUgcG9pbnQ6IHlvdSBhcmUgbWFraW5nIGEgY2hhbmdlIHRvIG1ha2UgaXQgd29y ay4gWW91IGFyZQpvZmZpY2lhbGl6aW5nIHN1cHBvcnQsIGRvIGl0IHByb3Blcmx5LgoKVGhlIG90 aGVyIHRpbWUgdGhhdCB3b3VsZCBoYXZlIGJlZW4gdGhlIHJpZ2h0IHRpbWUgd291bGQgaGF2ZSBi ZWVuIHdoZW4KUGF1bCBhZGRlZCB0aGUgcHJlbXVsdGlwbHkgZmlsdGVyLiBCdXQgdW5sZXNzIHlv dSBoYXZlIGEgVEFSRElTLCB0aGF0IGlzCm5vdCBhbiBvcHRpb24uCgpZb3Ugd2FudCB0aGUgZ2xv cnk/IERvIHRoZSB3b3JrLiBBcyBJIHBvaW50ZWQgaW4gdGhlIGZpcnN0IHBhcmFncmFwaCwgaXQK aXMgcXVpdGUgZWFzeS4gSXQgY2VydGFpbmx5IHdvdWxkIGhhdmUgdGFrZW4geW91IGxlc3MgdGlt ZSB0aGFuIGFyZ3VpbmcKd2l0aCBtZS4KCkkgZG8gbm90IHVuZGVyc3RhbmQgd2h5IHlvdSB3YW50 IHRvIHVzZSBwYXN0IHNsb3BwaW5lc3MgdG8ganVzdGlmeQpwcmVzZW50IHNsb3BwaW5lc3Mgd2hl biB5b3UgY291bGQgdHJlYXQgaXQgYXMgbG93LWhhbmdpbmcgZnJ1aXRzLgoKQnkgdGhlIHdheSwg dGhlcmUgaXMgYW5vdGhlciBmbGF3IHRoYXQgSSBqdXN0IG5vdGljZWQgaW4gdGhpcyBzZXJpZXM6 IGl0CmRvZXMgbm90IGhhdmUgYW55IHRyYW5zdmVyc2UgdXNlciBkb2N1bWVudGF0aW9uLiBTdXJl IHlvdSBhZGRlZCB0aGUKZG9jdW1lbnRhdGlvbiBmb3IgdGhlIG9wdGlvbnMsIGJ1dCBpdCBhbHNv IG5lZWQgYSBmZXcgcGFyYWdyYXBocyB0bwpleHBsYWluIHRvIHRoZSB1c2VyIHdoYXQgcHJlbXVs dGlwbGllZCBhbHBoYSBpcyBhbmQgd2hhdCB0byBkbyB3aXRoIGl0LgoKLS0gCiAgTmljb2xhcyBH ZW9yZ2UKX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX18KZmZt cGVnLWRldmVsIG1haWxpbmcgbGlzdApmZm1wZWctZGV2ZWxAZmZtcGVnLm9yZwpodHRwczovL2Zm bXBlZy5vcmcvbWFpbG1hbi9saXN0aW5mby9mZm1wZWctZGV2ZWwKClRvIHVuc3Vic2NyaWJlLCB2 aXNpdCBsaW5rIGFib3ZlLCBvciBlbWFpbApmZm1wZWctZGV2ZWwtcmVxdWVzdEBmZm1wZWcub3Jn IHdpdGggc3ViamVjdCAidW5zdWJzY3JpYmUiLgo=