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 C610C439FC for ; Tue, 5 Jul 2022 16:54:09 +0000 (UTC) Received: from [127.0.1.1] (localhost [127.0.0.1]) by ffbox0-bg.mplayerhq.hu (Postfix) with ESMTP id 4704D68BA09; Tue, 5 Jul 2022 19:54:06 +0300 (EEST) Received: from mail0.khirnov.net (red.khirnov.net [176.97.15.12]) by ffbox0-bg.mplayerhq.hu (Postfix) with ESMTPS id D1D3C68B655 for ; Tue, 5 Jul 2022 19:53:59 +0300 (EEST) Received: from localhost (localhost [IPv6:::1]) by mail0.khirnov.net (Postfix) with ESMTP id D80FF240179 for ; Tue, 5 Jul 2022 18:53:58 +0200 (CEST) Received: from mail0.khirnov.net ([IPv6:::1]) by localhost (mail0.khirnov.net [IPv6:::1]) (amavisd-new, port 10024) with ESMTP id LB0p7swzDvDH for ; Tue, 5 Jul 2022 18:53:58 +0200 (CEST) Received: from lain.khirnov.net (lain.khirnov.net [IPv6:2001:67c:1138:4306::3]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256 client-signature RSA-PSS (2048 bits) client-digest SHA256) (Client CN "lain.khirnov.net", Issuer "smtp.khirnov.net SMTP CA" (verified OK)) by mail0.khirnov.net (Postfix) with ESMTPS id 2B6802400F5 for ; Tue, 5 Jul 2022 18:53:58 +0200 (CEST) Received: by lain.khirnov.net (Postfix, from userid 1000) id 4DBA71601B2; Tue, 5 Jul 2022 18:53:58 +0200 (CEST) From: Anton Khirnov To: FFmpeg development discussions and patches In-Reply-To: References: <20220630210434.1551769-1-vigneshv@google.com> <20220630210434.1551769-2-vigneshv@google.com> <165675449715.31466.4432489889968017112@lain.khirnov.net> Mail-Followup-To: FFmpeg development discussions and patches Date: Tue, 05 Jul 2022 18:53:58 +0200 Message-ID: <165704003828.31466.16458124857567151808@lain.khirnov.net> User-Agent: alot/0.8.1 MIME-Version: 1.0 Subject: Re: [FFmpeg-devel] [PATCH 2/2] avformat/mov: Support parsing of still AVIF Alpha Channel 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: Quoting Vignesh Venkatasubramanian (2022-07-02 23:15:35) > > As for encoding, not fully sure how it should be integrated, if any > > encoders actually at this moment do proper alpha coding, or do all API > > clients have to separately encode with one context the primary image, > > and the alpha with another? > > I am not sure about other codecs, but in the case of AVIF/AV1, the > encoder does not understand/support alpha channels. The only way to do > it is to use two separate encoders. Can this not be handled in our encoder wrapper? We should strive as much as possible to shield our callers from codec-specific implementation details. -- Anton Khirnov _______________________________________________ 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".