From patchwork Mon Jun 17 13:48:57 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Fu, Linjie" X-Patchwork-Id: 13584 Return-Path: X-Original-To: patchwork@ffaux-bg.ffmpeg.org Delivered-To: patchwork@ffaux-bg.ffmpeg.org Received: from ffbox0-bg.mplayerhq.hu (ffbox0-bg.ffmpeg.org [79.124.17.100]) by ffaux.localdomain (Postfix) with ESMTP id 14C374471C5 for ; Mon, 17 Jun 2019 08:49:23 +0300 (EEST) Received: from [127.0.1.1] (localhost [127.0.0.1]) by ffbox0-bg.mplayerhq.hu (Postfix) with ESMTP id E6F02689A23; Mon, 17 Jun 2019 08:49:22 +0300 (EEST) X-Original-To: ffmpeg-devel@ffmpeg.org Delivered-To: ffmpeg-devel@ffmpeg.org Received: from mga07.intel.com (mga07.intel.com [134.134.136.100]) by ffbox0-bg.mplayerhq.hu (Postfix) with ESMTPS id DC29B6801D9 for ; Mon, 17 Jun 2019 08:49:15 +0300 (EEST) X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from fmsmga006.fm.intel.com ([10.253.24.20]) by orsmga105.jf.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 16 Jun 2019 22:49:13 -0700 X-ExtLoop1: 1 Received: from media_lj_kbl.sh.intel.com ([10.239.13.115]) by fmsmga006.fm.intel.com with ESMTP; 16 Jun 2019 22:49:12 -0700 From: Linjie Fu To: ffmpeg-devel@ffmpeg.org Date: Mon, 17 Jun 2019 21:48:57 +0800 Message-Id: <20190617134857.6799-1-linjie.fu@intel.com> X-Mailer: git-send-email 2.17.1 Subject: [FFmpeg-devel] [PATCH 2/2] doc/encoders.texi: add docs for trellis 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: Linjie Fu MIME-Version: 1.0 Errors-To: ffmpeg-devel-bounces@ffmpeg.org Sender: "ffmpeg-devel" Signed-off-by: Linjie Fu --- doc/encoders.texi | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/doc/encoders.texi b/doc/encoders.texi index eefd124751..2e54dcc15f 100644 --- a/doc/encoders.texi +++ b/doc/encoders.texi @@ -2899,6 +2899,13 @@ will refer only to P- or I-frames. When set to greater values multiple layers of B-frames will be present, frames in each layer only referring to frames in higher layers. +@item trellis +Trellis quantization can improve data compression in DCT-based encoding methods. +It reduces the size of some DCT coefficients while recovering others to take their +place. This process can increase quality by effectively finding the optimal +quantization for each block to maximize the PSNR relative to bitrate. +Set to off/I/P/B to disable or enable trellis quantization for I/P/B frames. + @item rc_mode Set the rate control mode to use. A given driver may only support a subset of modes.