From patchwork Fri Dec 1 09:01:23 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Zhong Li X-Patchwork-Id: 6489 Delivered-To: ffmpegpatchwork@gmail.com Received: by 10.2.161.94 with SMTP id m30csp912145jah; Fri, 1 Dec 2017 01:03:58 -0800 (PST) X-Google-Smtp-Source: AGs4zMbmJvj5Ebs/1KQa4lI0h0l3hP4tRw2oKS0o6Vil33trfTIztF4VXtVt80O+Ri0VSKnbr1TH X-Received: by 10.223.161.222 with SMTP id v30mr4414815wrv.191.1512119037998; Fri, 01 Dec 2017 01:03:57 -0800 (PST) ARC-Seal: i=1; a=rsa-sha256; t=1512119037; cv=none; d=google.com; s=arc-20160816; b=zurc+gQWp+SeD3xyFkYLqA5fBZ9eEWPzS2EesKvTBfXsZJvrtpiAxQINuhfBTBBP+H AZAEv5cSvvPk4orgQAhjgBNHdAqtImFrPXVz9utvgU9uoDov31xZ/vdKBiOwOl3gVvqT G056xn24vPyjnJxJ8IVotFNnc/O2PckaO0Vj0dgZhrUnLuFbViUdIiVYNmIheirVIK74 wATOZ3Ix2ybGdG5AF0UrD03DddZ5WHNHGRCUjct2DQiaVN5VD20I9FZOZb9oFy1vIebU h7FROtlhBb6lfmg0DW5kOmc4XqRUCMNiKU599ev7S05aI8VtDar3GWqzU2sqLQEyJZQq Jc4g== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=sender:errors-to:content-transfer-encoding:mime-version:cc:reply-to :list-subscribe:list-help:list-post:list-archive:list-unsubscribe :list-id:precedence:subject:message-id:date:to:from:delivered-to :arc-authentication-results; bh=sdsjqTm314iiIEjCl/pLs7Dk4dQGQJNSXObMJ/DAmdo=; b=qpcbAIZMqe2xwQCR/o/aj/0a7gVTrrfgoTNjkZhct/4dDsw22hGngnOVCXuJ+rPp+i lKoCT12kT+86zLNBwyIk4/CwLAd74P2dkSgwakjZ7dK8h70SohzFyZeCH4+Jzqz39b7S KdfdjHfK2sWH7OuGwnoxEcD8YOx2rR2jnW6g0HXK6Qqa/WU7le5LQ6GnPXSQE11Ov1JK YKvJtMdDqMeqzdD1u0gftTs+Cb/6HPuBpGDNoT8H/DrLAM8Lo4ZfNHF6A0D0BX/bq6oH 1CsBv24s9MrWy1gbSqTr/zAukhUuylOvp50tBEfqFZ0ibaOX/xYgGD+8ZwAVo2aNndfk 9hRQ== ARC-Authentication-Results: i=1; mx.google.com; spf=pass (google.com: domain of ffmpeg-devel-bounces@ffmpeg.org designates 79.124.17.100 as permitted sender) smtp.mailfrom=ffmpeg-devel-bounces@ffmpeg.org Return-Path: Received: from ffbox0-bg.mplayerhq.hu (ffbox0-bg.ffmpeg.org. [79.124.17.100]) by mx.google.com with ESMTP id z55si5031423wrz.49.2017.12.01.01.03.57; Fri, 01 Dec 2017 01:03:57 -0800 (PST) Received-SPF: pass (google.com: domain of ffmpeg-devel-bounces@ffmpeg.org designates 79.124.17.100 as permitted sender) client-ip=79.124.17.100; Authentication-Results: mx.google.com; spf=pass (google.com: domain of ffmpeg-devel-bounces@ffmpeg.org designates 79.124.17.100 as permitted sender) smtp.mailfrom=ffmpeg-devel-bounces@ffmpeg.org Received: from [127.0.1.1] (localhost [127.0.0.1]) by ffbox0-bg.mplayerhq.hu (Postfix) with ESMTP id 199B168A431; Fri, 1 Dec 2017 11:03:53 +0200 (EET) X-Original-To: ffmpeg-devel@ffmpeg.org Delivered-To: ffmpeg-devel@ffmpeg.org Received: from mga05.intel.com (mga05.intel.com [192.55.52.43]) by ffbox0-bg.mplayerhq.hu (Postfix) with ESMTPS id 9491A68A28B for ; Fri, 1 Dec 2017 11:03:45 +0200 (EET) Received: from fmsmga005.fm.intel.com ([10.253.24.32]) by fmsmga105.fm.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 01 Dec 2017 01:02:37 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.45,344,1508828400"; d="scan'208";a="182343430" Received: from unknown (HELO localhost.localdomain.sh.intel.com) ([10.239.13.18]) by fmsmga005.fm.intel.com with ESMTP; 01 Dec 2017 01:02:37 -0800 From: Zhong Li To: ffmpeg-devel@ffmpeg.org Date: Fri, 1 Dec 2017 17:01:23 +0800 Message-Id: <1512118883-17023-1-git-send-email-zhong.li@intel.com> X-Mailer: git-send-email 1.8.3.1 Subject: [FFmpeg-devel] [PATCH V2] lavc/qsvenc: set HRD buffer size X-BeenThere: ffmpeg-devel@ffmpeg.org X-Mailman-Version: 2.1.20 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: Zhong Li MIME-Version: 1.0 Errors-To: ffmpeg-devel-bounces@ffmpeg.org Sender: "ffmpeg-devel" Hypothetical Reference Decoding (HRD) model assumes that data flows into a buffer of the fixed size BufferSizeInKB with a constant bitrate. Smaller BufferSizeInKB means smaller frame size variations, but more difficult to maintain HRD. Signed-off-by: Zhong Li --- libavcodec/qsvenc.c | 1 + 1 file changed, 1 insertion(+) diff --git a/libavcodec/qsvenc.c b/libavcodec/qsvenc.c index 57f78c4..96c8fb5 100644 --- a/libavcodec/qsvenc.c +++ b/libavcodec/qsvenc.c @@ -495,6 +495,7 @@ static int init_video_param(AVCodecContext *avctx, QSVEncContext *q) #if QSV_HAVE_VCM case MFX_RATECONTROL_VCM: #endif + q->param.mfx.BufferSizeInKB = avctx->rc_buffer_size / 8000; q->param.mfx.InitialDelayInKB = avctx->rc_initial_buffer_occupancy / 1000; q->param.mfx.TargetKbps = avctx->bit_rate / 1000; q->param.mfx.MaxKbps = avctx->rc_max_rate / 1000;