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 713274A8B9 for ; Thu, 18 Apr 2024 13:33:07 +0000 (UTC) Received: from [127.0.1.1] (localhost [127.0.0.1]) by ffbox0-bg.mplayerhq.hu (Postfix) with ESMTP id 0B2DF68D24D; Thu, 18 Apr 2024 16:33:04 +0300 (EEST) Received: from btbn.de (btbn.de [144.76.60.213]) by ffbox0-bg.mplayerhq.hu (Postfix) with ESMTPS id 03DEC68CF59 for ; Thu, 18 Apr 2024 16:32:57 +0300 (EEST) Received: from [authenticated] by btbn.de (Postfix) with ESMTPSA id F1F3527FFD907; Thu, 18 Apr 2024 15:32:56 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=rothenpieler.org; s=mail; t=1713447177; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=qXYvI9YOO4a1c/ok2f34nXIr3kRc1iTYV/gOm8COp8U=; b=iVmt0tjnLHIJonELsc70CpeLSpeCuBUc0Lg1FH1d1FdDaizUTaCRk+bqIuvVAr/SryLWX4 bJzLdymUOab8S/eHEjW8MqgWq7Fx3vCRwxwYrfkN5UN8B3Qk6rMmsa6v0C1ufNC4gbg7/S 6eIhfCIrZ0g4j9DRLFdHfV1SN+3d0xFmFekN4zo14nhTuK+6O+sRIva1woCdY0EWkcni2S 5hhSMfkk2eBnnSai++PBE1pM0UO1rcNbzEJ+6BjPkLE3vLTuJqOSMH11ynnaZxEGJnarml H2LWMdYRUSaRmrcELBI6yE2vuPUPdyIKSs6Nqlxq6njk2mJOEuFP3G1gMq4BQw== Message-ID: <2540329d-79aa-4996-a566-b7b55299de0c@rothenpieler.org> Date: Thu, 18 Apr 2024 15:33:06 +0200 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird To: Roman Arzumanyan , FFmpeg development discussions and patches References: <20240415143932.338380-1-ddesouza@nvidia.com> <26df08ee-ee02-408a-98ea-ef5fe77c93c7@rothenpieler.org> Content-Language: en-US, de-DE From: Timo Rothenpieler In-Reply-To: Subject: Re: [FFmpeg-devel] [PATCH] avcodec/nvenc: High bit depth encoding for HEVC 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: Diego Felix de Souza Content-Transfer-Encoding: 7bit Content-Type: text/plain; charset="us-ascii"; Format="flowed" Errors-To: ffmpeg-devel-bounces@ffmpeg.org Sender: "ffmpeg-devel" Archived-At: List-Archive: List-Post: On 18/04/2024 14:29, Roman Arzumanyan wrote: > Hi Diego, > Asking for my own education. > > As far as you've explained, the 8 > 10 bit conversion happens within the > driver, that's understandable. > But how does it influence the output? Does it perform some sort of > proprietary SDR > HDR conversion under the hood that maps the ranges? > What's gonna be the user observable difference between these 2 scenarios? > 1) 8 bit input > HEVC 8 bit profile > 8 bit HEVC output > 2) 8 bit input > 10 bit up conversion > HEVC 10 bit profile > 10 bit > HEVC output > > Better visual quality? Smaller compressed file size? > In other words, what's the purpose of this feature except enabling new > Video Codec SDK capability? Video Codecs tend to be more efficient with 10 bit, even if it's just 8 bit content that's been up-converted to 10 bit. I.e. yes, it'll (Or can, at least. Not sure if it's a given.) produce smaller/higher quality content for the same input. As for the exact reason, I can't explain, but it's a well known concept. _______________________________________________ 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".