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 B051A457CA for ; Wed, 22 Feb 2023 01:43:13 +0000 (UTC) Received: from [127.0.1.1] (localhost [127.0.0.1]) by ffbox0-bg.mplayerhq.hu (Postfix) with ESMTP id BE7A068BF93; Wed, 22 Feb 2023 03:43:09 +0200 (EET) Received: from mail-ed1-f42.google.com (mail-ed1-f42.google.com [209.85.208.42]) by ffbox0-bg.mplayerhq.hu (Postfix) with ESMTPS id E1E9968BF7F for ; Wed, 22 Feb 2023 03:43:03 +0200 (EET) Received: by mail-ed1-f42.google.com with SMTP id cy6so19006838edb.5 for ; Tue, 21 Feb 2023 17:43:03 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=cc:to:subject:message-id:date:from:in-reply-to:references :mime-version:from:to:cc:subject:date:message-id:reply-to; bh=B6AyCiSvL68O92IcJb6GhxGjPmgSZRbWCVaZ41gOAzs=; b=DatnPZZovBS1mkeB3f8muw7IOWrjJL0nzOOlbOreD/4+65FKLHUKkg8WEBLbl8kycd dGiHpATzJopKA7d9D1mmz6ItG/Sfd3eBoKERU3zRE7yOJCjVYjW2NXXCjHJEc57aJh8P hibw4IT8CpjkChT4bZrd9gCtFzGTYXbMvG1YnajguycS+vWVWLj8ZzKyuo0Z1iV+/Z97 pHR9oRndUFSocyiSdA4SyaPQTnghvAmp6PuIGzZ3RtcE4XN4n2jaPmN8LZngoWpL6HKe BoEgeLSLDD7cqdFKZ3bWm4vNXRLjc+z6fnQiooZ9S38YCAms0cSlpJMop5VUvcDFxqsD s0NA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=cc:to:subject:message-id:date:from:in-reply-to:references :mime-version:x-gm-message-state:from:to:cc:subject:date:message-id :reply-to; bh=B6AyCiSvL68O92IcJb6GhxGjPmgSZRbWCVaZ41gOAzs=; b=Mxx36mHaBUZdamAyISjf4yBMzjmI9vqBH86U/RuDsK7F6xJP32lqdRK5RVz+OvXJ0J XdbVj98fBEeIyDI1QLAB4LFW8PxAzh10lP75BluBVICJLSu/1IZPZ16tOrvOO1kofcKw rJzfE7Uh3B85ihN9D75o+rKQjSSt3+mhr8Wp9FwGWX8L271KtHB680aqtqKcfKyg+XMA 1IKqYFqX9zTmocwSpYR7S8tUxo5p3qqWdyen9YHxvLsTOB9mUmh9mzQ/xC5CsS14Bk8v LEIDOYJsryXgrNL4MVr0038qmsiTI3eVsd7/IaWeAtOiTG4M/W4KRw5Yv7TiLuHbzHWG yyWw== X-Gm-Message-State: AO0yUKVs6d1MQmhOj8DdpNI+W2cIiambuo0rppmjHEaT9bQ+EWUDqq7M 69WpRqC9VKzmvI1vHsJFnuHx3a1/r9awscHlStpA/ExV X-Google-Smtp-Source: AK7set8zT9dJD8ub+R7ttW4SZPzZqs3YJGcjwgM2aCOf4j606TtDVXhv2FJhNVW7IuTNbLA8OrUe+E16vbI3dqBcNJs= X-Received: by 2002:a17:906:4550:b0:8b1:7aec:c8e7 with SMTP id s16-20020a170906455000b008b17aecc8e7mr8570272ejq.8.1677030182754; Tue, 21 Feb 2023 17:43:02 -0800 (PST) MIME-Version: 1.0 References: <20230221223555.102670-1-leo.izen@gmail.com> In-Reply-To: <20230221223555.102670-1-leo.izen@gmail.com> From: "Ronald S. Bultje" Date: Tue, 21 Feb 2023 20:42:51 -0500 Message-ID: To: FFmpeg development discussions and patches X-Content-Filtered-By: Mailman/MimeDel 2.1.29 Subject: Re: [FFmpeg-devel] [PATCH v4] avcodec/pngdec: read colorspace info when decoding with AVDISCARD_ALL 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 Cc: Leo Izen 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: Hi, On Tue, Feb 21, 2023 at 5:36 PM Leo Izen wrote: > These chunks are lightweight and it's useful information to have when > running ffmpeg -i or ffprobe, for example. > I disagree conceptually with this. If we want to skip "all" decoding, we should also skip metadata for said frames. I think what we're looking for here is a partial decoding stage, e.g. "header-only" or similar, instead of "including framedata", for some or all frames. That's orthogonal to AVDISCARD_*. Ronald _______________________________________________ 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".