4cfad5ae0f
- 全新ui - 全面优化websocket逻辑，提高数字人和ui连接的稳定性及资源开销 - 全面优化唤醒逻辑，提供稳定的普通唤醒模式和前置词唤醒模式 - 优化拾音质量，支持多声道麦克风拾音 - 优化自动播放服务器的对接机制，提供稳定和兼容旧版ue工程的对接模式 - 数字人接口输出机器人表情，以适应新fay ui及单片机的数字人表情输出 - 使用更高级的音频时长计算方式，可以更精准控制音频播放完成后的逻辑 - 修复点击关闭按钮会导致程序退出的bug - 修复没有麦克风的设备开启麦克风会出错的问题 - 为服务器主机地址提供配置项，以方便服务器部署
267 lines
8.1 KiB
HTML
267 lines
8.1 KiB
HTML
<!DOCTYPE html>
|
|
<html>
|
|
<!-- Created by GNU Texinfo 7.0.1, https://www.gnu.org/software/texinfo/ -->
|
|
<head>
|
|
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
|
|
<title>FFmpeg Scaler Documentation</title>
|
|
|
|
<meta name="description" content="FFmpeg Scaler Documentation">
|
|
<meta name="keywords" content="FFmpeg Scaler Documentation">
|
|
<meta name="resource-type" content="document">
|
|
<meta name="distribution" content="global">
|
|
<meta name="Generator" content="makeinfo">
|
|
<meta name="viewport" content="width=device-width,initial-scale=1">
|
|
|
|
<link href="#SEC_Contents" rel="contents" title="Table of Contents">
|
|
<style type="text/css">
|
|
<!--
|
|
ul.toc-numbered-mark {list-style: none}
|
|
-->
|
|
</style>
|
|
|
|
|
|
</head>
|
|
|
|
<body lang="en">
|
|
|
|
|
|
<div class="top-level-extent" id="SEC_Top">
|
|
|
|
|
|
<div class="element-contents" id="SEC_Contents">
|
|
<h2 class="contents-heading">Table of Contents</h2>
|
|
|
|
<div class="contents">
|
|
|
|
<ul class="toc-numbered-mark">
|
|
<li><a id="toc-Description" href="#Description">1 Description</a></li>
|
|
<li><a id="toc-Scaler-Options" href="#Scaler-Options">2 Scaler Options</a></li>
|
|
<li><a id="toc-See-Also" href="#See-Also">3 See Also</a></li>
|
|
<li><a id="toc-Authors" href="#Authors">4 Authors</a></li>
|
|
</ul>
|
|
</div>
|
|
</div>
|
|
<div class="chapter-level-extent" id="Description">
|
|
<h2 class="chapter">1 Description</h2>
|
|
|
|
<p>The FFmpeg rescaler provides a high-level interface to the libswscale
|
|
library image conversion utilities. In particular it allows one to perform
|
|
image rescaling and pixel format conversion.
|
|
</p>
|
|
|
|
<a class="anchor" id="scaler_005foptions"></a></div>
|
|
<div class="chapter-level-extent" id="Scaler-Options">
|
|
<h2 class="chapter">2 Scaler Options</h2>
|
|
|
|
<p>The video scaler supports the following named options.
|
|
</p>
|
|
<p>Options may be set by specifying -<var class="var">option</var> <var class="var">value</var> in the
|
|
FFmpeg tools, with a few API-only exceptions noted below.
|
|
For programmatic use, they can be set explicitly in the
|
|
<code class="code">SwsContext</code> options or through the <samp class="file">libavutil/opt.h</samp> API.
|
|
</p>
|
|
<dl class="table">
|
|
<dd>
|
|
<a class="anchor" id="sws_005fflags"></a></dd>
|
|
<dt><samp class="option">sws_flags</samp></dt>
|
|
<dd><p>Set the scaler flags. This is also used to set the scaling
|
|
algorithm. Only a single algorithm should be selected. Default
|
|
value is ‘<samp class="samp">bicubic</samp>’.
|
|
</p>
|
|
<p>It accepts the following values:
|
|
</p><dl class="table">
|
|
<dt>‘<samp class="samp">fast_bilinear</samp>’</dt>
|
|
<dd><p>Select fast bilinear scaling algorithm.
|
|
</p>
|
|
</dd>
|
|
<dt>‘<samp class="samp">bilinear</samp>’</dt>
|
|
<dd><p>Select bilinear scaling algorithm.
|
|
</p>
|
|
</dd>
|
|
<dt>‘<samp class="samp">bicubic</samp>’</dt>
|
|
<dd><p>Select bicubic scaling algorithm.
|
|
</p>
|
|
</dd>
|
|
<dt>‘<samp class="samp">experimental</samp>’</dt>
|
|
<dd><p>Select experimental scaling algorithm.
|
|
</p>
|
|
</dd>
|
|
<dt>‘<samp class="samp">neighbor</samp>’</dt>
|
|
<dd><p>Select nearest neighbor rescaling algorithm.
|
|
</p>
|
|
</dd>
|
|
<dt>‘<samp class="samp">area</samp>’</dt>
|
|
<dd><p>Select averaging area rescaling algorithm.
|
|
</p>
|
|
</dd>
|
|
<dt>‘<samp class="samp">bicublin</samp>’</dt>
|
|
<dd><p>Select bicubic scaling algorithm for the luma component, bilinear for
|
|
chroma components.
|
|
</p>
|
|
</dd>
|
|
<dt>‘<samp class="samp">gauss</samp>’</dt>
|
|
<dd><p>Select Gaussian rescaling algorithm.
|
|
</p>
|
|
</dd>
|
|
<dt>‘<samp class="samp">sinc</samp>’</dt>
|
|
<dd><p>Select sinc rescaling algorithm.
|
|
</p>
|
|
</dd>
|
|
<dt>‘<samp class="samp">lanczos</samp>’</dt>
|
|
<dd><p>Select Lanczos rescaling algorithm. The default width (alpha) is 3 and can be
|
|
changed by setting <code class="code">param0</code>.
|
|
</p>
|
|
</dd>
|
|
<dt>‘<samp class="samp">spline</samp>’</dt>
|
|
<dd><p>Select natural bicubic spline rescaling algorithm.
|
|
</p>
|
|
</dd>
|
|
<dt>‘<samp class="samp">print_info</samp>’</dt>
|
|
<dd><p>Enable printing/debug logging.
|
|
</p>
|
|
</dd>
|
|
<dt>‘<samp class="samp">accurate_rnd</samp>’</dt>
|
|
<dd><p>Enable accurate rounding.
|
|
</p>
|
|
</dd>
|
|
<dt>‘<samp class="samp">full_chroma_int</samp>’</dt>
|
|
<dd><p>Enable full chroma interpolation.
|
|
</p>
|
|
</dd>
|
|
<dt>‘<samp class="samp">full_chroma_inp</samp>’</dt>
|
|
<dd><p>Select full chroma input.
|
|
</p>
|
|
</dd>
|
|
<dt>‘<samp class="samp">bitexact</samp>’</dt>
|
|
<dd><p>Enable bitexact output.
|
|
</p></dd>
|
|
</dl>
|
|
|
|
</dd>
|
|
<dt><samp class="option">srcw <var class="var">(API only)</var></samp></dt>
|
|
<dd><p>Set source width.
|
|
</p>
|
|
</dd>
|
|
<dt><samp class="option">srch <var class="var">(API only)</var></samp></dt>
|
|
<dd><p>Set source height.
|
|
</p>
|
|
</dd>
|
|
<dt><samp class="option">dstw <var class="var">(API only)</var></samp></dt>
|
|
<dd><p>Set destination width.
|
|
</p>
|
|
</dd>
|
|
<dt><samp class="option">dsth <var class="var">(API only)</var></samp></dt>
|
|
<dd><p>Set destination height.
|
|
</p>
|
|
</dd>
|
|
<dt><samp class="option">src_format <var class="var">(API only)</var></samp></dt>
|
|
<dd><p>Set source pixel format (must be expressed as an integer).
|
|
</p>
|
|
</dd>
|
|
<dt><samp class="option">dst_format <var class="var">(API only)</var></samp></dt>
|
|
<dd><p>Set destination pixel format (must be expressed as an integer).
|
|
</p>
|
|
</dd>
|
|
<dt><samp class="option">src_range <var class="var">(boolean)</var></samp></dt>
|
|
<dd><p>If value is set to <code class="code">1</code>, indicates source is full range. Default value is
|
|
<code class="code">0</code>, which indicates source is limited range.
|
|
</p>
|
|
</dd>
|
|
<dt><samp class="option">dst_range <var class="var">(boolean)</var></samp></dt>
|
|
<dd><p>If value is set to <code class="code">1</code>, enable full range for destination. Default value
|
|
is <code class="code">0</code>, which enables limited range.
|
|
</p>
|
|
<a class="anchor" id="sws_005fparams"></a></dd>
|
|
<dt><samp class="option">param0, param1</samp></dt>
|
|
<dd><p>Set scaling algorithm parameters. The specified values are specific of
|
|
some scaling algorithms and ignored by others. The specified values
|
|
are floating point number values.
|
|
</p>
|
|
</dd>
|
|
<dt><samp class="option">sws_dither</samp></dt>
|
|
<dd><p>Set the dithering algorithm. Accepts one of the following
|
|
values. Default value is ‘<samp class="samp">auto</samp>’.
|
|
</p>
|
|
<dl class="table">
|
|
<dt>‘<samp class="samp">auto</samp>’</dt>
|
|
<dd><p>automatic choice
|
|
</p>
|
|
</dd>
|
|
<dt>‘<samp class="samp">none</samp>’</dt>
|
|
<dd><p>no dithering
|
|
</p>
|
|
</dd>
|
|
<dt>‘<samp class="samp">bayer</samp>’</dt>
|
|
<dd><p>bayer dither
|
|
</p>
|
|
</dd>
|
|
<dt>‘<samp class="samp">ed</samp>’</dt>
|
|
<dd><p>error diffusion dither
|
|
</p>
|
|
</dd>
|
|
<dt>‘<samp class="samp">a_dither</samp>’</dt>
|
|
<dd><p>arithmetic dither, based using addition
|
|
</p>
|
|
</dd>
|
|
<dt>‘<samp class="samp">x_dither</samp>’</dt>
|
|
<dd><p>arithmetic dither, based using xor (more random/less apparent patterning that
|
|
a_dither).
|
|
</p>
|
|
</dd>
|
|
</dl>
|
|
|
|
</dd>
|
|
<dt><samp class="option">alphablend</samp></dt>
|
|
<dd><p>Set the alpha blending to use when the input has alpha but the output does not.
|
|
Default value is ‘<samp class="samp">none</samp>’.
|
|
</p>
|
|
<dl class="table">
|
|
<dt>‘<samp class="samp">uniform_color</samp>’</dt>
|
|
<dd><p>Blend onto a uniform background color
|
|
</p>
|
|
</dd>
|
|
<dt>‘<samp class="samp">checkerboard</samp>’</dt>
|
|
<dd><p>Blend onto a checkerboard
|
|
</p>
|
|
</dd>
|
|
<dt>‘<samp class="samp">none</samp>’</dt>
|
|
<dd><p>No blending
|
|
</p>
|
|
</dd>
|
|
</dl>
|
|
|
|
</dd>
|
|
</dl>
|
|
|
|
|
|
</div>
|
|
<div class="chapter-level-extent" id="See-Also">
|
|
<h2 class="chapter">3 See Also</h2>
|
|
|
|
<p><a class="url" href="ffmpeg.html">ffmpeg</a>, <a class="url" href="ffplay.html">ffplay</a>, <a class="url" href="ffprobe.html">ffprobe</a>,
|
|
<a class="url" href="libswscale.html">libswscale</a>
|
|
</p>
|
|
|
|
</div>
|
|
<div class="chapter-level-extent" id="Authors">
|
|
<h2 class="chapter">4 Authors</h2>
|
|
|
|
<p>The FFmpeg developers.
|
|
</p>
|
|
<p>For details about the authorship, see the Git history of the project
|
|
(https://git.ffmpeg.org/ffmpeg), e.g. by typing the command
|
|
<code class="command">git log</code> in the FFmpeg source directory, or browsing the
|
|
online repository at <a class="url" href="https://git.ffmpeg.org/ffmpeg">https://git.ffmpeg.org/ffmpeg</a>.
|
|
</p>
|
|
<p>Maintainers for the specific components are listed in the file
|
|
<samp class="file">MAINTAINERS</samp> in the source code tree.
|
|
</p>
|
|
|
|
</div>
|
|
</div>
|
|
|
|
|
|
|
|
</body>
|
|
</html>
|