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 ADFF540EA9 for ; Sat, 1 Jan 2022 01:12:04 +0000 (UTC) Received: from [127.0.1.1] (localhost [127.0.0.1]) by ffbox0-bg.mplayerhq.hu (Postfix) with ESMTP id A059F68A4CD; Sat, 1 Jan 2022 03:12:01 +0200 (EET) Received: from mail.personalprojects.net (mail.personalprojects.net [51.79.67.80]) by ffbox0-bg.mplayerhq.hu (Postfix) with ESMTPS id 1F12E689972 for ; Sat, 1 Jan 2022 03:11:55 +0200 (EET) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=personalprojects.net; s=20211201; h=Content-Transfer-Encoding:MIME-Version: Message-Id:Date:Subject:To:From:Sender:Reply-To:Cc:Content-Type:Content-ID: Content-Description:Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc :Resent-Message-ID:In-Reply-To:References:List-Id:List-Help:List-Unsubscribe: List-Subscribe:List-Post:List-Owner:List-Archive; bh=66CQPHPLfZf2JaoVrozY8kfTXsxOR3GmkW2QUPAP3zE=; b=n75uJzbQPompeXqXstoZV3+Ki6 ZQIHyjZkM+2XsETpN269ohRUuUXcZ6nsz2H82JjaS6dBesSjN8BmFK9qMGbR9bEMZKiu7pFUjzCmc KoDkbXidLmdjV/pms1bV8fYPSTip/K7R07okUKEihKqygMf7uRk4duEpixlRr9n7eR+A=; Received: from bras-base-simcon3012w-grc-05-64-231-188-105.dsl.bell.ca ([64.231.188.105] helo=courtney.binaryfoundry.ca) by mail.personalprojects.net with esmtpsa (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1n3Sw5-0006lA-HS for ffmpeg-devel@ffmpeg.org; Fri, 31 Dec 2021 20:11:53 -0500 From: John-Paul Stewart To: ffmpeg-devel@ffmpeg.org Date: Fri, 31 Dec 2021 20:11:46 -0500 Message-Id: <20220101011148.13921-1-jpstewart@personalprojects.net> X-Mailer: git-send-email 2.34.1 MIME-Version: 1.0 Subject: [FFmpeg-devel] [PATCH v2 0/2] avformat/mvdec: make audio stream conditional 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: Changed in v2: Allocate the audio stream first to maintain consistent behaviour with prior code. Recent discussion on the list led me to realize that libavformat was unconditionally creating an audio stream for all SGI movie format (version 2) files, even when no audio is present in the file. A sample of a movie file with no audio can be found at http://www.personalprojects.net/ffmpeg/silent.movie Unpatched ffmpeg will report an audio stream even though no audio is present. After the following patch no audio stream is reported. Incidentally, the silent.movie sample above is at 25fps and can also be used by anyone who wants to double-check the earlier patch 3c9ffbd009 that reads and sets the framerate. The sample file is only about 88 KB. _______________________________________________ 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".