blackteay/ffmpeg-python
1
0
Fork 0
mirror of https://github.com/kkroening/ffmpeg-python.git synced 2025-04-05 04:22:51 +08:00
Code Issues Projects Releases Wiki Activity
ffmpeg-python/doc/html/index.html
lcjh fc41f4aa84
Fix heigth -> height typo (#596) 
Co-authored-by: Karl Kroening <karlk@kralnet.us>
2022-03-07 01:55:30 -08:00

762 lines
63 KiB
HTML
Raw Blame History

This file contains ambiguous Unicode characters

This file contains Unicode characters that might be confused with other characters. If you think that this is intentional, you can safely ignore this warning. Use the Escape button to reveal them.

<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta charset="utf-8" />
<title>ffmpeg-python: Python bindings for FFmpeg &#8212; ffmpeg-python documentation</title>
<link rel="stylesheet" href="_static/nature.css" type="text/css" />
<link rel="stylesheet" href="_static/pygments.css" type="text/css" />
<script type="text/javascript" id="documentation_options" data-url_root="./" src="_static/documentation_options.js"></script>
<script type="text/javascript" src="_static/jquery.js"></script>
<script type="text/javascript" src="_static/underscore.js"></script>
<script type="text/javascript" src="_static/doctools.js"></script>
<script type="text/javascript" src="_static/language_data.js"></script>
<link rel="index" title="Index" href="genindex.html" />
<link rel="search" title="Search" href="search.html" />
</head><body>
<div class="related" role="navigation" aria-label="related navigation">
<h3>Navigation</h3>
<ul>
<li class="right" style="margin-right: 10px">
<a href="genindex.html" title="General Index"
accesskey="I">index</a></li>
<li class="right" >
<a href="py-modindex.html" title="Python Module Index"
>modules</a> |</li>
<li class="nav-item nav-item-0"><a href="#">ffmpeg-python documentation</a> &#187;</li>
</ul>
</div>
<div class="document">
<div class="documentwrapper">
<div class="bodywrapper">
<div class="body" role="main">
<div class="section" id="ffmpeg-python-python-bindings-for-ffmpeg">
<h1>ffmpeg-python: Python bindings for FFmpeg<a class="headerlink" href="#ffmpeg-python-python-bindings-for-ffmpeg" title="Permalink to this headline"></a></h1>
<dl class="field-list simple">
<dt class="field-odd">Github</dt>
<dd class="field-odd"><p><a class="reference external" href="https://github.com/kkroening/ffmpeg-python">https://github.com/kkroening/ffmpeg-python</a></p>
</dd>
</dl>
<div class="toctree-wrapper compound">
</div>
<span class="target" id="module-ffmpeg"></span><dl class="class">
<dt id="ffmpeg.Stream">
<em class="property">class </em><code class="sig-prename descclassname">ffmpeg.</code><code class="sig-name descname">Stream</code><span class="sig-paren">(</span><em class="sig-param">upstream_node</em>, <em class="sig-param">upstream_label</em>, <em class="sig-param">node_types</em>, <em class="sig-param">upstream_selector=None</em><span class="sig-paren">)</span><a class="headerlink" href="#ffmpeg.Stream" title="Permalink to this definition"></a></dt>
<dd><p>Bases: <code class="xref py py-class docutils literal notranslate"><span class="pre">object</span></code></p>
<p>Represents the outgoing edge of an upstream node; may be used to create more downstream nodes.</p>
<dl class="method">
<dt id="ffmpeg.Stream.audio">
<em class="property">property </em><code class="sig-name descname">audio</code><a class="headerlink" href="#ffmpeg.Stream.audio" title="Permalink to this definition"></a></dt>
<dd><p>Select the audio-portion of a stream.</p>
<p>Some ffmpeg filters drop audio streams, and care must be taken
to preserve the audio in the final output. The <code class="docutils literal notranslate"><span class="pre">.audio</span></code> and
<code class="docutils literal notranslate"><span class="pre">.video</span></code> operators can be used to reference the audio/video
portions of a stream so that they can be processed separately
and then re-combined later in the pipeline. This dilemma is
intrinsic to ffmpeg, and ffmpeg-python tries to stay out of the
way while users may refer to the official ffmpeg documentation
as to why certain filters drop audio.</p>
<p><code class="docutils literal notranslate"><span class="pre">stream.audio</span></code> is a shorthand for <code class="docutils literal notranslate"><span class="pre">stream['a']</span></code>.</p>
<p class="rubric">Example</p>
<p>Process the audio and video portions of a stream independently:</p>
<div class="highlight-default notranslate"><div class="highlight"><pre><span></span><span class="nb">input</span> <span class="o">=</span> <span class="n">ffmpeg</span><span class="o">.</span><span class="n">input</span><span class="p">(</span><span class="s1">&#39;in.mp4&#39;</span><span class="p">)</span>
<span class="n">audio</span> <span class="o">=</span> <span class="nb">input</span><span class="o">.</span><span class="n">audio</span><span class="o">.</span><span class="n">filter</span><span class="p">(</span><span class="s2">&quot;aecho&quot;</span><span class="p">,</span> <span class="mf">0.8</span><span class="p">,</span> <span class="mf">0.9</span><span class="p">,</span> <span class="mi">1000</span><span class="p">,</span> <span class="mf">0.3</span><span class="p">)</span>
<span class="n">video</span> <span class="o">=</span> <span class="nb">input</span><span class="o">.</span><span class="n">video</span><span class="o">.</span><span class="n">hflip</span><span class="p">()</span>
<span class="n">out</span> <span class="o">=</span> <span class="n">ffmpeg</span><span class="o">.</span><span class="n">output</span><span class="p">(</span><span class="n">audio</span><span class="p">,</span> <span class="n">video</span><span class="p">,</span> <span class="s1">&#39;out.mp4&#39;</span><span class="p">)</span>
</pre></div>
</div>
</dd></dl>
<dl class="method">
<dt id="ffmpeg.Stream.video">
<em class="property">property </em><code class="sig-name descname">video</code><a class="headerlink" href="#ffmpeg.Stream.video" title="Permalink to this definition"></a></dt>
<dd><p>Select the video-portion of a stream.</p>
<p>Some ffmpeg filters drop audio streams, and care must be taken
to preserve the audio in the final output. The <code class="docutils literal notranslate"><span class="pre">.audio</span></code> and
<code class="docutils literal notranslate"><span class="pre">.video</span></code> operators can be used to reference the audio/video
portions of a stream so that they can be processed separately
and then re-combined later in the pipeline. This dilemma is
intrinsic to ffmpeg, and ffmpeg-python tries to stay out of the
way while users may refer to the official ffmpeg documentation
as to why certain filters drop audio.</p>
<p><code class="docutils literal notranslate"><span class="pre">stream.video</span></code> is a shorthand for <code class="docutils literal notranslate"><span class="pre">stream['v']</span></code>.</p>
<p class="rubric">Example</p>
<p>Process the audio and video portions of a stream independently:</p>
<div class="highlight-default notranslate"><div class="highlight"><pre><span></span><span class="nb">input</span> <span class="o">=</span> <span class="n">ffmpeg</span><span class="o">.</span><span class="n">input</span><span class="p">(</span><span class="s1">&#39;in.mp4&#39;</span><span class="p">)</span>
<span class="n">audio</span> <span class="o">=</span> <span class="nb">input</span><span class="o">.</span><span class="n">audio</span><span class="o">.</span><span class="n">filter</span><span class="p">(</span><span class="s2">&quot;aecho&quot;</span><span class="p">,</span> <span class="mf">0.8</span><span class="p">,</span> <span class="mf">0.9</span><span class="p">,</span> <span class="mi">1000</span><span class="p">,</span> <span class="mf">0.3</span><span class="p">)</span>
<span class="n">video</span> <span class="o">=</span> <span class="nb">input</span><span class="o">.</span><span class="n">video</span><span class="o">.</span><span class="n">hflip</span><span class="p">()</span>
<span class="n">out</span> <span class="o">=</span> <span class="n">ffmpeg</span><span class="o">.</span><span class="n">output</span><span class="p">(</span><span class="n">audio</span><span class="p">,</span> <span class="n">video</span><span class="p">,</span> <span class="s1">&#39;out.mp4&#39;</span><span class="p">)</span>
</pre></div>
</div>
</dd></dl>
<dl class="method">
<dt id="ffmpeg.Stream.view">
<code class="sig-name descname">view</code><span class="sig-paren">(</span><em class="sig-param">detail=False</em>, <em class="sig-param">filename=None</em>, <em class="sig-param">pipe=False</em>, <em class="sig-param">**kwargs</em><span class="sig-paren">)</span><a class="headerlink" href="#ffmpeg.Stream.view" title="Permalink to this definition"></a></dt>
<dd></dd></dl>
</dd></dl>
<dl class="function">
<dt id="ffmpeg.input">
<code class="sig-prename descclassname">ffmpeg.</code><code class="sig-name descname">input</code><span class="sig-paren">(</span><em class="sig-param">filename</em>, <em class="sig-param">**kwargs</em><span class="sig-paren">)</span><a class="headerlink" href="#ffmpeg.input" title="Permalink to this definition"></a></dt>
<dd><p>Input file URL (ffmpeg <code class="docutils literal notranslate"><span class="pre">-i</span></code> option)</p>
<p>Any supplied kwargs are passed to ffmpeg verbatim (e.g. <code class="docutils literal notranslate"><span class="pre">t=20</span></code>,
<code class="docutils literal notranslate"><span class="pre">f='mp4'</span></code>, <code class="docutils literal notranslate"><span class="pre">acodec='pcm'</span></code>, etc.).</p>
<p>To tell ffmpeg to read from stdin, use <code class="docutils literal notranslate"><span class="pre">pipe:</span></code> as the filename.</p>
<p>Official documentation: <a class="reference external" href="https://ffmpeg.org/ffmpeg.html#Main-options">Main options</a></p>
</dd></dl>
<dl class="function">
<dt id="ffmpeg.merge_outputs">
<code class="sig-prename descclassname">ffmpeg.</code><code class="sig-name descname">merge_outputs</code><span class="sig-paren">(</span><em class="sig-param">*streams</em><span class="sig-paren">)</span><a class="headerlink" href="#ffmpeg.merge_outputs" title="Permalink to this definition"></a></dt>
<dd><p>Include all given outputs in one ffmpeg command line</p>
</dd></dl>
<dl class="function">
<dt id="ffmpeg.output">
<code class="sig-prename descclassname">ffmpeg.</code><code class="sig-name descname">output</code><span class="sig-paren">(</span><em class="sig-param">*streams_and_filename</em>, <em class="sig-param">**kwargs</em><span class="sig-paren">)</span><a class="headerlink" href="#ffmpeg.output" title="Permalink to this definition"></a></dt>
<dd><p>Output file URL</p>
<dl class="simple">
<dt>Syntax:</dt><dd><p><cite>ffmpeg.output(stream1[, stream2, stream3…], filename, **ffmpeg_args)</cite></p>
</dd>
</dl>
<p>Any supplied keyword arguments are passed to ffmpeg verbatim (e.g.
<code class="docutils literal notranslate"><span class="pre">t=20</span></code>, <code class="docutils literal notranslate"><span class="pre">f='mp4'</span></code>, <code class="docutils literal notranslate"><span class="pre">acodec='pcm'</span></code>, <code class="docutils literal notranslate"><span class="pre">vcodec='rawvideo'</span></code>,
etc.). Some keyword-arguments are handled specially, as shown below.</p>
<dl class="field-list simple">
<dt class="field-odd">Parameters</dt>
<dd class="field-odd"><ul class="simple">
<li><p><strong>video_bitrate</strong> – parameter for <code class="docutils literal notranslate"><span class="pre">-b:v</span></code>, e.g. <code class="docutils literal notranslate"><span class="pre">video_bitrate=1000</span></code>.</p></li>
<li><p><strong>audio_bitrate</strong> – parameter for <code class="docutils literal notranslate"><span class="pre">-b:a</span></code>, e.g. <code class="docutils literal notranslate"><span class="pre">audio_bitrate=200</span></code>.</p></li>
<li><p><strong>format</strong> – alias for <code class="docutils literal notranslate"><span class="pre">-f</span></code> parameter, e.g. <code class="docutils literal notranslate"><span class="pre">format='mp4'</span></code>
(equivalent to <code class="docutils literal notranslate"><span class="pre">f='mp4'</span></code>).</p></li>
</ul>
</dd>
</dl>
<p>If multiple streams are provided, they are mapped to the same
output.</p>
<p>To tell ffmpeg to write to stdout, use <code class="docutils literal notranslate"><span class="pre">pipe:</span></code> as the filename.</p>
<p>Official documentation: <a class="reference external" href="https://ffmpeg.org/ffmpeg.html#Synopsis">Synopsis</a></p>
</dd></dl>
<dl class="function">
<dt id="ffmpeg.overwrite_output">
<code class="sig-prename descclassname">ffmpeg.</code><code class="sig-name descname">overwrite_output</code><span class="sig-paren">(</span><em class="sig-param">stream</em><span class="sig-paren">)</span><a class="headerlink" href="#ffmpeg.overwrite_output" title="Permalink to this definition"></a></dt>
<dd><p>Overwrite output files without asking (ffmpeg <code class="docutils literal notranslate"><span class="pre">-y</span></code> option)</p>
<p>Official documentation: <a class="reference external" href="https://ffmpeg.org/ffmpeg.html#Main-options">Main options</a></p>
</dd></dl>
<dl class="function">
<dt id="ffmpeg.probe">
<code class="sig-prename descclassname">ffmpeg.</code><code class="sig-name descname">probe</code><span class="sig-paren">(</span><em class="sig-param">filename</em>, <em class="sig-param">cmd='ffprobe'</em>, <em class="sig-param">**kwargs</em><span class="sig-paren">)</span><a class="headerlink" href="#ffmpeg.probe" title="Permalink to this definition"></a></dt>
<dd><p>Run ffprobe on the specified file and return a JSON representation of the output.</p>
<dl class="field-list simple">
<dt class="field-odd">Raises</dt>
<dd class="field-odd"><p><a class="reference internal" href="#ffmpeg.Error" title="ffmpeg.Error"><strong>ffmpeg.Error</strong></a> – if ffprobe returns a non-zero exit code,
an <a class="reference internal" href="#ffmpeg.Error" title="ffmpeg.Error"><code class="xref py py-class docutils literal notranslate"><span class="pre">Error</span></code></a> is returned with a generic error message.
The stderr output can be retrieved by accessing the
<code class="docutils literal notranslate"><span class="pre">stderr</span></code> property of the exception.</p>
</dd>
</dl>
</dd></dl>
<dl class="function">
<dt id="ffmpeg.compile">
<code class="sig-prename descclassname">ffmpeg.</code><code class="sig-name descname">compile</code><span class="sig-paren">(</span><em class="sig-param">stream_spec</em>, <em class="sig-param">cmd='ffmpeg'</em>, <em class="sig-param">overwrite_output=False</em><span class="sig-paren">)</span><a class="headerlink" href="#ffmpeg.compile" title="Permalink to this definition"></a></dt>
<dd><p>Build command-line for invoking ffmpeg.</p>
<p>The <a class="reference internal" href="#ffmpeg.run" title="ffmpeg.run"><code class="xref py py-meth docutils literal notranslate"><span class="pre">run()</span></code></a> function uses this to build the command line
arguments and should work in most cases, but calling this function
directly is useful for debugging or if you need to invoke ffmpeg
manually for whatever reason.</p>
<p>This is the same as calling <a class="reference internal" href="#ffmpeg.get_args" title="ffmpeg.get_args"><code class="xref py py-meth docutils literal notranslate"><span class="pre">get_args()</span></code></a> except that it also
includes the <code class="docutils literal notranslate"><span class="pre">ffmpeg</span></code> command as the first argument.</p>
</dd></dl>
<dl class="exception">
<dt id="ffmpeg.Error">
<em class="property">exception </em><code class="sig-prename descclassname">ffmpeg.</code><code class="sig-name descname">Error</code><span class="sig-paren">(</span><em class="sig-param">cmd</em>, <em class="sig-param">stdout</em>, <em class="sig-param">stderr</em><span class="sig-paren">)</span><a class="headerlink" href="#ffmpeg.Error" title="Permalink to this definition"></a></dt>
<dd><p>Bases: <code class="xref py py-class docutils literal notranslate"><span class="pre">Exception</span></code></p>
</dd></dl>
<dl class="function">
<dt id="ffmpeg.get_args">
<code class="sig-prename descclassname">ffmpeg.</code><code class="sig-name descname">get_args</code><span class="sig-paren">(</span><em class="sig-param">stream_spec</em>, <em class="sig-param">overwrite_output=False</em><span class="sig-paren">)</span><a class="headerlink" href="#ffmpeg.get_args" title="Permalink to this definition"></a></dt>
<dd><p>Build command-line arguments to be passed to ffmpeg.</p>
</dd></dl>
<dl class="function">
<dt id="ffmpeg.run">
<code class="sig-prename descclassname">ffmpeg.</code><code class="sig-name descname">run</code><span class="sig-paren">(</span><em class="sig-param">stream_spec</em>, <em class="sig-param">cmd='ffmpeg'</em>, <em class="sig-param">capture_stdout=False</em>, <em class="sig-param">capture_stderr=False</em>, <em class="sig-param">input=None</em>, <em class="sig-param">quiet=False</em>, <em class="sig-param">overwrite_output=False</em><span class="sig-paren">)</span><a class="headerlink" href="#ffmpeg.run" title="Permalink to this definition"></a></dt>
<dd><p>Invoke ffmpeg for the supplied node graph.</p>
<dl class="field-list simple">
<dt class="field-odd">Parameters</dt>
<dd class="field-odd"><ul class="simple">
<li><p><strong>capture_stdout</strong> – if True, capture stdout (to be used with
<code class="docutils literal notranslate"><span class="pre">pipe:</span></code> ffmpeg outputs).</p></li>
<li><p><strong>capture_stderr</strong> – if True, capture stderr.</p></li>
<li><p><strong>quiet</strong> – shorthand for setting <code class="docutils literal notranslate"><span class="pre">capture_stdout</span></code> and <code class="docutils literal notranslate"><span class="pre">capture_stderr</span></code>.</p></li>
<li><p><strong>input</strong> – text to be sent to stdin (to be used with <code class="docutils literal notranslate"><span class="pre">pipe:</span></code>
ffmpeg inputs)</p></li>
<li><p><strong>**kwargs</strong> – keyword-arguments passed to <code class="docutils literal notranslate"><span class="pre">get_args()</span></code> (e.g.
<code class="docutils literal notranslate"><span class="pre">overwrite_output=True</span></code>).</p></li>
</ul>
</dd>
</dl>
<p>Returns: (out, err) tuple containing captured stdout and stderr data.</p>
</dd></dl>
<dl class="function">
<dt id="ffmpeg.run_async">
<code class="sig-prename descclassname">ffmpeg.</code><code class="sig-name descname">run_async</code><span class="sig-paren">(</span><em class="sig-param">stream_spec</em>, <em class="sig-param">cmd='ffmpeg'</em>, <em class="sig-param">pipe_stdin=False</em>, <em class="sig-param">pipe_stdout=False</em>, <em class="sig-param">pipe_stderr=False</em>, <em class="sig-param">quiet=False</em>, <em class="sig-param">overwrite_output=False</em><span class="sig-paren">)</span><a class="headerlink" href="#ffmpeg.run_async" title="Permalink to this definition"></a></dt>
<dd><p>Asynchronously invoke ffmpeg for the supplied node graph.</p>
<dl class="field-list simple">
<dt class="field-odd">Parameters</dt>
<dd class="field-odd"><ul class="simple">
<li><p><strong>pipe_stdin</strong> – if True, connect pipe to subprocess stdin (to be
used with <code class="docutils literal notranslate"><span class="pre">pipe:</span></code> ffmpeg inputs).</p></li>
<li><p><strong>pipe_stdout</strong> – if True, connect pipe to subprocess stdout (to be
used with <code class="docutils literal notranslate"><span class="pre">pipe:</span></code> ffmpeg outputs).</p></li>
<li><p><strong>pipe_stderr</strong> – if True, connect pipe to subprocess stderr.</p></li>
<li><p><strong>quiet</strong> – shorthand for setting <code class="docutils literal notranslate"><span class="pre">capture_stdout</span></code> and
<code class="docutils literal notranslate"><span class="pre">capture_stderr</span></code>.</p></li>
<li><p><strong>**kwargs</strong> – keyword-arguments passed to <code class="docutils literal notranslate"><span class="pre">get_args()</span></code> (e.g.
<code class="docutils literal notranslate"><span class="pre">overwrite_output=True</span></code>).</p></li>
</ul>
</dd>
<dt class="field-even">Returns</dt>
<dd class="field-even"><p>A <a class="reference external" href="https://docs.python.org/3/library/subprocess.html#popen-objects">subprocess Popen</a> object representing the child process.</p>
</dd>
</dl>
<p class="rubric">Examples</p>
<p>Run and stream input:</p>
<div class="highlight-default notranslate"><div class="highlight"><pre><span></span><span class="n">process</span> <span class="o">=</span> <span class="p">(</span>
<span class="n">ffmpeg</span>
<span class="o">.</span><span class="n">input</span><span class="p">(</span><span class="s1">&#39;pipe:&#39;</span><span class="p">,</span> <span class="nb">format</span><span class="o">=</span><span class="s1">&#39;rawvideo&#39;</span><span class="p">,</span> <span class="n">pix_fmt</span><span class="o">=</span><span class="s1">&#39;rgb24&#39;</span><span class="p">,</span> <span class="n">s</span><span class="o">=</span><span class="s1">&#39;</span><span class="si">{}</span><span class="s1">x</span><span class="si">{}</span><span class="s1">&#39;</span><span class="o">.</span><span class="n">format</span><span class="p">(</span><span class="n">width</span><span class="p">,</span> <span class="n">height</span><span class="p">))</span>
<span class="o">.</span><span class="n">output</span><span class="p">(</span><span class="n">out_filename</span><span class="p">,</span> <span class="n">pix_fmt</span><span class="o">=</span><span class="s1">&#39;yuv420p&#39;</span><span class="p">)</span>
<span class="o">.</span><span class="n">overwrite_output</span><span class="p">()</span>
<span class="o">.</span><span class="n">run_async</span><span class="p">(</span><span class="n">pipe_stdin</span><span class="o">=</span><span class="kc">True</span><span class="p">)</span>
<span class="p">)</span>
<span class="n">process</span><span class="o">.</span><span class="n">communicate</span><span class="p">(</span><span class="nb">input</span><span class="o">=</span><span class="n">input_data</span><span class="p">)</span>
</pre></div>
</div>
<p>Run and capture output:</p>
<div class="highlight-default notranslate"><div class="highlight"><pre><span></span><span class="n">process</span> <span class="o">=</span> <span class="p">(</span>
<span class="n">ffmpeg</span>
<span class="o">.</span><span class="n">input</span><span class="p">(</span><span class="n">in_filename</span><span class="p">)</span>
<span class="o">.</span><span class="n">output</span><span class="p">(</span><span class="s1">&#39;pipe&#39;</span><span class="p">:,</span> <span class="nb">format</span><span class="o">=</span><span class="s1">&#39;rawvideo&#39;</span><span class="p">,</span> <span class="n">pix_fmt</span><span class="o">=</span><span class="s1">&#39;rgb24&#39;</span><span class="p">)</span>
<span class="o">.</span><span class="n">run_async</span><span class="p">(</span><span class="n">pipe_stdout</span><span class="o">=</span><span class="kc">True</span><span class="p">,</span> <span class="n">pipe_stderr</span><span class="o">=</span><span class="kc">True</span><span class="p">)</span>
<span class="p">)</span>
<span class="n">out</span><span class="p">,</span> <span class="n">err</span> <span class="o">=</span> <span class="n">process</span><span class="o">.</span><span class="n">communicate</span><span class="p">()</span>
</pre></div>
</div>
<p>Process video frame-by-frame using numpy:</p>
<div class="highlight-default notranslate"><div class="highlight"><pre><span></span><span class="n">process1</span> <span class="o">=</span> <span class="p">(</span>
<span class="n">ffmpeg</span>
<span class="o">.</span><span class="n">input</span><span class="p">(</span><span class="n">in_filename</span><span class="p">)</span>
<span class="o">.</span><span class="n">output</span><span class="p">(</span><span class="s1">&#39;pipe:&#39;</span><span class="p">,</span> <span class="nb">format</span><span class="o">=</span><span class="s1">&#39;rawvideo&#39;</span><span class="p">,</span> <span class="n">pix_fmt</span><span class="o">=</span><span class="s1">&#39;rgb24&#39;</span><span class="p">)</span>
<span class="o">.</span><span class="n">run_async</span><span class="p">(</span><span class="n">pipe_stdout</span><span class="o">=</span><span class="kc">True</span><span class="p">)</span>
<span class="p">)</span>
<span class="n">process2</span> <span class="o">=</span> <span class="p">(</span>
<span class="n">ffmpeg</span>
<span class="o">.</span><span class="n">input</span><span class="p">(</span><span class="s1">&#39;pipe:&#39;</span><span class="p">,</span> <span class="nb">format</span><span class="o">=</span><span class="s1">&#39;rawvideo&#39;</span><span class="p">,</span> <span class="n">pix_fmt</span><span class="o">=</span><span class="s1">&#39;rgb24&#39;</span><span class="p">,</span> <span class="n">s</span><span class="o">=</span><span class="s1">&#39;</span><span class="si">{}</span><span class="s1">x</span><span class="si">{}</span><span class="s1">&#39;</span><span class="o">.</span><span class="n">format</span><span class="p">(</span><span class="n">width</span><span class="p">,</span> <span class="n">height</span><span class="p">))</span>
<span class="o">.</span><span class="n">output</span><span class="p">(</span><span class="n">out_filename</span><span class="p">,</span> <span class="n">pix_fmt</span><span class="o">=</span><span class="s1">&#39;yuv420p&#39;</span><span class="p">)</span>
<span class="o">.</span><span class="n">overwrite_output</span><span class="p">()</span>
<span class="o">.</span><span class="n">run_async</span><span class="p">(</span><span class="n">pipe_stdin</span><span class="o">=</span><span class="kc">True</span><span class="p">)</span>
<span class="p">)</span>
<span class="k">while</span> <span class="kc">True</span><span class="p">:</span>
<span class="n">in_bytes</span> <span class="o">=</span> <span class="n">process1</span><span class="o">.</span><span class="n">stdout</span><span class="o">.</span><span class="n">read</span><span class="p">(</span><span class="n">width</span> <span class="o">*</span> <span class="n">height</span> <span class="o">*</span> <span class="mi">3</span><span class="p">)</span>
<span class="k">if</span> <span class="ow">not</span> <span class="n">in_bytes</span><span class="p">:</span>
<span class="k">break</span>
<span class="n">in_frame</span> <span class="o">=</span> <span class="p">(</span>
<span class="n">np</span>
<span class="o">.</span><span class="n">frombuffer</span><span class="p">(</span><span class="n">in_bytes</span><span class="p">,</span> <span class="n">np</span><span class="o">.</span><span class="n">uint8</span><span class="p">)</span>
<span class="o">.</span><span class="n">reshape</span><span class="p">([</span><span class="n">height</span><span class="p">,</span> <span class="n">width</span><span class="p">,</span> <span class="mi">3</span><span class="p">])</span>
<span class="p">)</span>
<span class="n">out_frame</span> <span class="o">=</span> <span class="n">in_frame</span> <span class="o">*</span> <span class="mf">0.3</span>
<span class="n">process2</span><span class="o">.</span><span class="n">stdin</span><span class="o">.</span><span class="n">write</span><span class="p">(</span>
<span class="n">frame</span>
<span class="o">.</span><span class="n">astype</span><span class="p">(</span><span class="n">np</span><span class="o">.</span><span class="n">uint8</span><span class="p">)</span>
<span class="o">.</span><span class="n">tobytes</span><span class="p">()</span>
<span class="p">)</span>
<span class="n">process2</span><span class="o">.</span><span class="n">stdin</span><span class="o">.</span><span class="n">close</span><span class="p">()</span>
<span class="n">process1</span><span class="o">.</span><span class="n">wait</span><span class="p">()</span>
<span class="n">process2</span><span class="o">.</span><span class="n">wait</span><span class="p">()</span>
</pre></div>
</div>
</dd></dl>
<dl class="function">
<dt id="ffmpeg.view">
<code class="sig-prename descclassname">ffmpeg.</code><code class="sig-name descname">view</code><span class="sig-paren">(</span><em class="sig-param">stream_spec</em>, <em class="sig-param">detail=False</em>, <em class="sig-param">filename=None</em>, <em class="sig-param">pipe=False</em>, <em class="sig-param">**kwargs</em><span class="sig-paren">)</span><a class="headerlink" href="#ffmpeg.view" title="Permalink to this definition"></a></dt>
<dd></dd></dl>
<dl class="function">
<dt id="ffmpeg.colorchannelmixer">
<code class="sig-prename descclassname">ffmpeg.</code><code class="sig-name descname">colorchannelmixer</code><span class="sig-paren">(</span><em class="sig-param">stream</em>, <em class="sig-param">*args</em>, <em class="sig-param">**kwargs</em><span class="sig-paren">)</span><a class="headerlink" href="#ffmpeg.colorchannelmixer" title="Permalink to this definition"></a></dt>
<dd><p>Adjust video input frames by re-mixing color channels.</p>
<p>Official documentation: <a class="reference external" href="https://ffmpeg.org/ffmpeg-filters.html#colorchannelmixer">colorchannelmixer</a></p>
</dd></dl>
<dl class="function">
<dt id="ffmpeg.concat">
<code class="sig-prename descclassname">ffmpeg.</code><code class="sig-name descname">concat</code><span class="sig-paren">(</span><em class="sig-param">*streams</em>, <em class="sig-param">**kwargs</em><span class="sig-paren">)</span><a class="headerlink" href="#ffmpeg.concat" title="Permalink to this definition"></a></dt>
<dd><p>Concatenate audio and video streams, joining them together one after the other.</p>
<p>The filter works on segments of synchronized video and audio streams. All segments must have the same number of
streams of each type, and that will also be the number of streams at output.</p>
<dl class="field-list simple">
<dt class="field-odd">Parameters</dt>
<dd class="field-odd"><p><strong>unsafe</strong> – Activate unsafe mode: do not fail if segments have a different format.</p>
</dd>
</dl>
<p>Related streams do not always have exactly the same duration, for various reasons including codec frame size or
sloppy authoring. For that reason, related synchronized streams (e.g. a video and its audio track) should be
concatenated at once. The concat filter will use the duration of the longest stream in each segment (except the
last one), and if necessary pad shorter audio streams with silence.</p>
<p>For this filter to work correctly, all segments must start at timestamp 0.</p>
<p>All corresponding streams must have the same parameters in all segments; the filtering system will automatically
select a common pixel format for video streams, and a common sample format, sample rate and channel layout for
audio streams, but other settings, such as resolution, must be converted explicitly by the user.</p>
<p>Different frame rates are acceptable but will result in variable frame rate at output; be sure to configure the
output file to handle it.</p>
<p>Official documentation: <a class="reference external" href="https://ffmpeg.org/ffmpeg-filters.html#concat">concat</a></p>
</dd></dl>
<dl class="function">
<dt id="ffmpeg.crop">
<code class="sig-prename descclassname">ffmpeg.</code><code class="sig-name descname">crop</code><span class="sig-paren">(</span><em class="sig-param">stream</em>, <em class="sig-param">x</em>, <em class="sig-param">y</em>, <em class="sig-param">width</em>, <em class="sig-param">height</em>, <em class="sig-param">**kwargs</em><span class="sig-paren">)</span><a class="headerlink" href="#ffmpeg.crop" title="Permalink to this definition"></a></dt>
<dd><p>Crop the input video.</p>
<dl class="field-list simple">
<dt class="field-odd">Parameters</dt>
<dd class="field-odd"><ul class="simple">
<li><p><strong>x</strong> – The horizontal position, in the input video, of the left edge of
the output video.</p></li>
<li><p><strong>y</strong> – The vertical position, in the input video, of the top edge of the
output video.</p></li>
<li><p><strong>width</strong> – The width of the output video. Must be greater than 0.</p></li>
<li><p><strong>height</strong> – The height of the output video. Must be greater than 0.</p></li>
</ul>
</dd>
</dl>
<p>Official documentation: <a class="reference external" href="https://ffmpeg.org/ffmpeg-filters.html#crop">crop</a></p>
</dd></dl>
<dl class="function">
<dt id="ffmpeg.drawbox">
<code class="sig-prename descclassname">ffmpeg.</code><code class="sig-name descname">drawbox</code><span class="sig-paren">(</span><em class="sig-param">stream</em>, <em class="sig-param">x</em>, <em class="sig-param">y</em>, <em class="sig-param">width</em>, <em class="sig-param">height</em>, <em class="sig-param">color</em>, <em class="sig-param">thickness=None</em>, <em class="sig-param">**kwargs</em><span class="sig-paren">)</span><a class="headerlink" href="#ffmpeg.drawbox" title="Permalink to this definition"></a></dt>
<dd><p>Draw a colored box on the input image.</p>
<dl class="field-list simple">
<dt class="field-odd">Parameters</dt>
<dd class="field-odd"><ul class="simple">
<li><p><strong>x</strong> – The expression which specifies the top left corner x coordinate of the box. It defaults to 0.</p></li>
<li><p><strong>y</strong> – The expression which specifies the top left corner y coordinate of the box. It defaults to 0.</p></li>
<li><p><strong>width</strong> – Specify the width of the box; if 0 interpreted as the input width. It defaults to 0.</p></li>
<li><p><strong>height</strong> – Specify the height of the box; if 0 interpreted as the input height. It defaults to 0.</p></li>
<li><p><strong>color</strong> – Specify the color of the box to write. For the general syntax of this option, check the “Color” section
in the ffmpeg-utils manual. If the special value invert is used, the box edge color is the same as the
video with inverted luma.</p></li>
<li><p><strong>thickness</strong> – The expression which sets the thickness of the box edge. Default value is 3.</p></li>
<li><p><strong>w</strong> – Alias for <code class="docutils literal notranslate"><span class="pre">width</span></code>.</p></li>
<li><p><strong>h</strong> – Alias for <code class="docutils literal notranslate"><span class="pre">height</span></code>.</p></li>
<li><p><strong>c</strong> – Alias for <code class="docutils literal notranslate"><span class="pre">color</span></code>.</p></li>
<li><p><strong>t</strong> – Alias for <code class="docutils literal notranslate"><span class="pre">thickness</span></code>.</p></li>
</ul>
</dd>
</dl>
<p>Official documentation: <a class="reference external" href="https://ffmpeg.org/ffmpeg-filters.html#drawbox">drawbox</a></p>
</dd></dl>
<dl class="function">
<dt id="ffmpeg.drawtext">
<code class="sig-prename descclassname">ffmpeg.</code><code class="sig-name descname">drawtext</code><span class="sig-paren">(</span><em class="sig-param">stream</em>, <em class="sig-param">text=None</em>, <em class="sig-param">x=0</em>, <em class="sig-param">y=0</em>, <em class="sig-param">escape_text=True</em>, <em class="sig-param">**kwargs</em><span class="sig-paren">)</span><a class="headerlink" href="#ffmpeg.drawtext" title="Permalink to this definition"></a></dt>
<dd><p>Draw a text string or text from a specified file on top of a video, using the libfreetype library.</p>
<p>To enable compilation of this filter, you need to configure FFmpeg with <code class="docutils literal notranslate"><span class="pre">--enable-libfreetype</span></code>. To enable default
font fallback and the font option you need to configure FFmpeg with <code class="docutils literal notranslate"><span class="pre">--enable-libfontconfig</span></code>. To enable the
text_shaping option, you need to configure FFmpeg with <code class="docutils literal notranslate"><span class="pre">--enable-libfribidi</span></code>.</p>
<dl class="field-list simple">
<dt class="field-odd">Parameters</dt>
<dd class="field-odd"><ul class="simple">
<li><p><strong>box</strong> – Used to draw a box around text using the background color. The value must be either 1 (enable) or 0
(disable). The default value of box is 0.</p></li>
<li><p><strong>boxborderw</strong> – Set the width of the border to be drawn around the box using boxcolor. The default value of
boxborderw is 0.</p></li>
<li><p><strong>boxcolor</strong> – The color to be used for drawing box around text. For the syntax of this option, check the “Color”
section in the ffmpeg-utils manual. The default value of boxcolor is “white”.</p></li>
<li><p><strong>line_spacing</strong> – Set the line spacing in pixels of the border to be drawn around the box using box. The default
value of line_spacing is 0.</p></li>
<li><p><strong>borderw</strong> – Set the width of the border to be drawn around the text using bordercolor. The default value of
borderw is 0.</p></li>
<li><p><strong>bordercolor</strong> – Set the color to be used for drawing border around text. For the syntax of this option, check the
“Color” section in the ffmpeg-utils manual. The default value of bordercolor is “black”.</p></li>
<li><p><strong>expansion</strong> – Select how the text is expanded. Can be either none, strftime (deprecated) or normal (default). See
the Text expansion section below for details.</p></li>
<li><p><strong>basetime</strong> – Set a start time for the count. Value is in microseconds. Only applied in the deprecated strftime
expansion mode. To emulate in normal expansion mode use the pts function, supplying the start time (in
seconds) as the second argument.</p></li>
<li><p><strong>fix_bounds</strong> – If true, check and fix text coords to avoid clipping.</p></li>
<li><p><strong>fontcolor</strong> – The color to be used for drawing fonts. For the syntax of this option, check the “Color” section in
the ffmpeg-utils manual. The default value of fontcolor is “black”.</p></li>
<li><p><strong>fontcolor_expr</strong> – String which is expanded the same way as text to obtain dynamic fontcolor value. By default
this option has empty value and is not processed. When this option is set, it overrides fontcolor option.</p></li>
<li><p><strong>font</strong> – The font family to be used for drawing text. By default Sans.</p></li>
<li><p><strong>fontfile</strong> – The font file to be used for drawing text. The path must be included. This parameter is mandatory if
the fontconfig support is disabled.</p></li>
<li><p><strong>alpha</strong> – Draw the text applying alpha blending. The value can be a number between 0.0 and 1.0. The expression
accepts the same variables x, y as well. The default value is 1. Please see fontcolor_expr.</p></li>
<li><p><strong>fontsize</strong> – The font size to be used for drawing text. The default value of fontsize is 16.</p></li>
<li><p><strong>text_shaping</strong> – If set to 1, attempt to shape the text (for example, reverse the order of right-to-left text and
join Arabic characters) before drawing it. Otherwise, just draw the text exactly as given. By default 1 (if
supported).</p></li>
<li><p><strong>ft_load_flags</strong> – <p>The flags to be used for loading the fonts. The flags map the corresponding flags supported by
libfreetype, and are a combination of the following values:</p>
<ul>
<li><p><code class="docutils literal notranslate"><span class="pre">default</span></code></p></li>
<li><p><code class="docutils literal notranslate"><span class="pre">no_scale</span></code></p></li>
<li><p><code class="docutils literal notranslate"><span class="pre">no_hinting</span></code></p></li>
<li><p><code class="docutils literal notranslate"><span class="pre">render</span></code></p></li>
<li><p><code class="docutils literal notranslate"><span class="pre">no_bitmap</span></code></p></li>
<li><p><code class="docutils literal notranslate"><span class="pre">vertical_layout</span></code></p></li>
<li><p><code class="docutils literal notranslate"><span class="pre">force_autohint</span></code></p></li>
<li><p><code class="docutils literal notranslate"><span class="pre">crop_bitmap</span></code></p></li>
<li><p><code class="docutils literal notranslate"><span class="pre">pedantic</span></code></p></li>
<li><p><code class="docutils literal notranslate"><span class="pre">ignore_global_advance_width</span></code></p></li>
<li><p><code class="docutils literal notranslate"><span class="pre">no_recurse</span></code></p></li>
<li><p><code class="docutils literal notranslate"><span class="pre">ignore_transform</span></code></p></li>
<li><p><code class="docutils literal notranslate"><span class="pre">monochrome</span></code></p></li>
<li><p><code class="docutils literal notranslate"><span class="pre">linear_design</span></code></p></li>
<li><p><code class="docutils literal notranslate"><span class="pre">no_autohint</span></code></p></li>
</ul>
<p>Default value is “default”. For more information consult the documentation for the FT_LOAD_* libfreetype
flags.</p>
</p></li>
<li><p><strong>shadowcolor</strong> – The color to be used for drawing a shadow behind the drawn text. For the syntax of this option,
check the “Color” section in the ffmpeg-utils manual. The default value of shadowcolor is “black”.</p></li>
<li><p><strong>shadowx</strong> – The x offset for the text shadow position with respect to the position of the text. It can be either
positive or negative values. The default value is “0”.</p></li>
<li><p><strong>shadowy</strong> – The y offset for the text shadow position with respect to the position of the text. It can be either
positive or negative values. The default value is “0”.</p></li>
<li><p><strong>start_number</strong> – The starting frame number for the n/frame_num variable. The default value is “0”.</p></li>
<li><p><strong>tabsize</strong> – The size in number of spaces to use for rendering the tab. Default value is 4.</p></li>
<li><p><strong>timecode</strong> – Set the initial timecode representation in “hh:mm:ss[:;.]ff” format. It can be used with or without
text parameter. timecode_rate option must be specified.</p></li>
<li><p><strong>rate</strong> – Set the timecode frame rate (timecode only).</p></li>
<li><p><strong>timecode_rate</strong> – Alias for <code class="docutils literal notranslate"><span class="pre">rate</span></code>.</p></li>
<li><p><strong>r</strong> – Alias for <code class="docutils literal notranslate"><span class="pre">rate</span></code>.</p></li>
<li><p><strong>tc24hmax</strong> – If set to 1, the output of the timecode option will wrap around at 24 hours. Default is 0 (disabled).</p></li>
<li><p><strong>text</strong> – The text string to be drawn. The text must be a sequence of UTF-8 encoded characters. This parameter is
mandatory if no file is specified with the parameter textfile.</p></li>
<li><p><strong>textfile</strong> – A text file containing text to be drawn. The text must be a sequence of UTF-8 encoded characters.
This parameter is mandatory if no text string is specified with the parameter text. If both text and
textfile are specified, an error is thrown.</p></li>
<li><p><strong>reload</strong> – If set to 1, the textfile will be reloaded before each frame. Be sure to update it atomically, or it
may be read partially, or even fail.</p></li>
<li><p><strong>x</strong> – The expression which specifies the offset where text will be drawn within the video frame. It is relative to
the left border of the output image. The default value is “0”.</p></li>
<li><p><strong>y</strong> – The expression which specifies the offset where text will be drawn within the video frame. It is relative to
the top border of the output image. The default value is “0”. See below for the list of accepted constants
and functions.</p></li>
</ul>
</dd>
</dl>
<dl>
<dt>Expression constants:</dt><dd><dl class="simple">
<dt>The parameters for x and y are expressions containing the following constants and functions:</dt><dd><ul class="simple">
<li><p>dar: input display aspect ratio, it is the same as <code class="docutils literal notranslate"><span class="pre">(w</span> <span class="pre">/</span> <span class="pre">h)</span> <span class="pre">*</span> <span class="pre">sar</span></code></p></li>
<li><p>hsub: horizontal chroma subsample values. For example for the pixel format “yuv422p” hsub is 2 and vsub
is 1.</p></li>
<li><p>vsub: vertical chroma subsample values. For example for the pixel format “yuv422p” hsub is 2 and vsub
is 1.</p></li>
<li><p>line_h: the height of each text line</p></li>
<li><p>lh: Alias for <code class="docutils literal notranslate"><span class="pre">line_h</span></code>.</p></li>
<li><p>main_h: the input height</p></li>
<li><p>h: Alias for <code class="docutils literal notranslate"><span class="pre">main_h</span></code>.</p></li>
<li><p>H: Alias for <code class="docutils literal notranslate"><span class="pre">main_h</span></code>.</p></li>
<li><p>main_w: the input width</p></li>
<li><p>w: Alias for <code class="docutils literal notranslate"><span class="pre">main_w</span></code>.</p></li>
<li><p>W: Alias for <code class="docutils literal notranslate"><span class="pre">main_w</span></code>.</p></li>
<li><p>ascent: the maximum distance from the baseline to the highest/upper grid coordinate used to place a glyph
outline point, for all the rendered glyphs. It is a positive value, due to the grid’s orientation with the Y
axis upwards.</p></li>
<li><p>max_glyph_a: Alias for <code class="docutils literal notranslate"><span class="pre">ascent</span></code>.</p></li>
<li><p>descent: the maximum distance from the baseline to the lowest grid coordinate used to place a glyph outline
point, for all the rendered glyphs. This is a negative value, due to the grid’s orientation, with the Y axis
upwards.</p></li>
<li><p>max_glyph_d: Alias for <code class="docutils literal notranslate"><span class="pre">descent</span></code>.</p></li>
<li><p>max_glyph_h: maximum glyph height, that is the maximum height for all the glyphs contained in the rendered
text, it is equivalent to ascent - descent.</p></li>
<li><p>max_glyph_w: maximum glyph width, that is the maximum width for all the glyphs contained in the rendered
text.</p></li>
<li><p>n: the number of input frame, starting from 0</p></li>
<li><p>rand(min, max): return a random number included between min and max</p></li>
<li><p>sar: The input sample aspect ratio.</p></li>
<li><p>t: timestamp expressed in seconds, NAN if the input timestamp is unknown</p></li>
<li><p>text_h: the height of the rendered text</p></li>
<li><p>th: Alias for <code class="docutils literal notranslate"><span class="pre">text_h</span></code>.</p></li>
<li><p>text_w: the width of the rendered text</p></li>
<li><p>tw: Alias for <code class="docutils literal notranslate"><span class="pre">text_w</span></code>.</p></li>
<li><p>x: the x offset coordinates where the text is drawn.</p></li>
<li><p>y: the y offset coordinates where the text is drawn.</p></li>
</ul>
</dd>
</dl>
<p>These parameters allow the x and y expressions to refer each other, so you can for example specify
<code class="docutils literal notranslate"><span class="pre">y=x/dar</span></code>.</p>
</dd>
</dl>
<p>Official documentation: <a class="reference external" href="https://ffmpeg.org/ffmpeg-filters.html#drawtext">drawtext</a></p>
</dd></dl>
<dl class="function">
<dt id="ffmpeg.filter">
<code class="sig-prename descclassname">ffmpeg.</code><code class="sig-name descname">filter</code><span class="sig-paren">(</span><em class="sig-param">stream_spec</em>, <em class="sig-param">filter_name</em>, <em class="sig-param">*args</em>, <em class="sig-param">**kwargs</em><span class="sig-paren">)</span><a class="headerlink" href="#ffmpeg.filter" title="Permalink to this definition"></a></dt>
<dd><p>Apply custom filter.</p>
<p><code class="docutils literal notranslate"><span class="pre">filter_</span></code> is normally used by higher-level filter functions such as <code class="docutils literal notranslate"><span class="pre">hflip</span></code>, but if a filter implementation
is missing from <code class="docutils literal notranslate"><span class="pre">ffmpeg-python</span></code>, you can call <code class="docutils literal notranslate"><span class="pre">filter_</span></code> directly to have <code class="docutils literal notranslate"><span class="pre">ffmpeg-python</span></code> pass the filter name
and arguments to ffmpeg verbatim.</p>
<dl class="field-list simple">
<dt class="field-odd">Parameters</dt>
<dd class="field-odd"><ul class="simple">
<li><p><strong>stream_spec</strong> – a Stream, list of Streams, or label-to-Stream dictionary mapping</p></li>
<li><p><strong>filter_name</strong> – ffmpeg filter name, e.g. <cite>colorchannelmixer</cite></p></li>
<li><p><strong>*args</strong> – list of args to pass to ffmpeg verbatim</p></li>
<li><p><strong>**kwargs</strong> – list of keyword-args to pass to ffmpeg verbatim</p></li>
</ul>
</dd>
</dl>
<p>The function name is suffixed with <code class="docutils literal notranslate"><span class="pre">_</span></code> in order avoid confusion with the standard python <code class="docutils literal notranslate"><span class="pre">filter</span></code> function.</p>
<p class="rubric">Example</p>
<p><code class="docutils literal notranslate"><span class="pre">ffmpeg.input('in.mp4').filter('hflip').output('out.mp4').run()</span></code></p>
</dd></dl>
<dl class="function">
<dt id="ffmpeg.filter_">
<code class="sig-prename descclassname">ffmpeg.</code><code class="sig-name descname">filter_</code><span class="sig-paren">(</span><em class="sig-param">stream_spec</em>, <em class="sig-param">filter_name</em>, <em class="sig-param">*args</em>, <em class="sig-param">**kwargs</em><span class="sig-paren">)</span><a class="headerlink" href="#ffmpeg.filter_" title="Permalink to this definition"></a></dt>
<dd><p>Alternate name for <code class="docutils literal notranslate"><span class="pre">filter</span></code>, so as to not collide with the
built-in python <code class="docutils literal notranslate"><span class="pre">filter</span></code> operator.</p>
</dd></dl>
<dl class="function">
<dt id="ffmpeg.filter_multi_output">
<code class="sig-prename descclassname">ffmpeg.</code><code class="sig-name descname">filter_multi_output</code><span class="sig-paren">(</span><em class="sig-param">stream_spec</em>, <em class="sig-param">filter_name</em>, <em class="sig-param">*args</em>, <em class="sig-param">**kwargs</em><span class="sig-paren">)</span><a class="headerlink" href="#ffmpeg.filter_multi_output" title="Permalink to this definition"></a></dt>
<dd><p>Apply custom filter with one or more outputs.</p>
<p>This is the same as <code class="docutils literal notranslate"><span class="pre">filter</span></code> except that the filter can produce more than one output.</p>
<p>To reference an output stream, use either the <code class="docutils literal notranslate"><span class="pre">.stream</span></code> operator or bracket shorthand:</p>
<p class="rubric">Example</p>
<p><code class="docutils literal notranslate"><span class="pre">`</span>
<span class="pre">split</span> <span class="pre">=</span> <span class="pre">ffmpeg.input('in.mp4').filter_multi_output('split')</span>
<span class="pre">split0</span> <span class="pre">=</span> <span class="pre">split.stream(0)</span>
<span class="pre">split1</span> <span class="pre">=</span> <span class="pre">split[1]</span>
<span class="pre">ffmpeg.concat(split0,</span> <span class="pre">split1).output('out.mp4').run()</span>
<span class="pre">`</span></code></p>
</dd></dl>
<dl class="function">
<dt id="ffmpeg.hflip">
<code class="sig-prename descclassname">ffmpeg.</code><code class="sig-name descname">hflip</code><span class="sig-paren">(</span><em class="sig-param">stream</em><span class="sig-paren">)</span><a class="headerlink" href="#ffmpeg.hflip" title="Permalink to this definition"></a></dt>
<dd><p>Flip the input video horizontally.</p>
<p>Official documentation: <a class="reference external" href="https://ffmpeg.org/ffmpeg-filters.html#hflip">hflip</a></p>
</dd></dl>
<dl class="function">
<dt id="ffmpeg.hue">
<code class="sig-prename descclassname">ffmpeg.</code><code class="sig-name descname">hue</code><span class="sig-paren">(</span><em class="sig-param">stream</em>, <em class="sig-param">**kwargs</em><span class="sig-paren">)</span><a class="headerlink" href="#ffmpeg.hue" title="Permalink to this definition"></a></dt>
<dd><p>Modify the hue and/or the saturation of the input.</p>
<dl class="field-list simple">
<dt class="field-odd">Parameters</dt>
<dd class="field-odd"><ul class="simple">
<li><p><strong>h</strong> – Specify the hue angle as a number of degrees. It accepts an expression, and defaults to “0”.</p></li>
<li><p><strong>s</strong> – Specify the saturation in the [-10,10] range. It accepts an expression and defaults to “1”.</p></li>
<li><p><strong>H</strong> – Specify the hue angle as a number of radians. It accepts an expression, and defaults to “0”.</p></li>
<li><p><strong>b</strong> – Specify the brightness in the [-10,10] range. It accepts an expression and defaults to “0”.</p></li>
</ul>
</dd>
</dl>
<p>Official documentation: <a class="reference external" href="https://ffmpeg.org/ffmpeg-filters.html#hue">hue</a></p>
</dd></dl>
<dl class="function">
<dt id="ffmpeg.overlay">
<code class="sig-prename descclassname">ffmpeg.</code><code class="sig-name descname">overlay</code><span class="sig-paren">(</span><em class="sig-param">main_parent_node</em>, <em class="sig-param">overlay_parent_node</em>, <em class="sig-param">eof_action='repeat'</em>, <em class="sig-param">**kwargs</em><span class="sig-paren">)</span><a class="headerlink" href="#ffmpeg.overlay" title="Permalink to this definition"></a></dt>
<dd><p>Overlay one video on top of another.</p>
<dl class="field-list simple">
<dt class="field-odd">Parameters</dt>
<dd class="field-odd"><ul class="simple">
<li><p><strong>x</strong> – Set the expression for the x coordinates of the overlaid video on the main video. Default value is 0. In
case the expression is invalid, it is set to a huge value (meaning that the overlay will not be displayed
within the output visible area).</p></li>
<li><p><strong>y</strong> – Set the expression for the y coordinates of the overlaid video on the main video. Default value is 0. In
case the expression is invalid, it is set to a huge value (meaning that the overlay will not be displayed
within the output visible area).</p></li>
<li><p><strong>eof_action</strong> – <p>The action to take when EOF is encountered on the secondary input; it accepts one of the following
values:</p>
<ul>
<li><p><code class="docutils literal notranslate"><span class="pre">repeat</span></code>: Repeat the last frame (the default).</p></li>
<li><p><code class="docutils literal notranslate"><span class="pre">endall</span></code>: End both streams.</p></li>
<li><p><code class="docutils literal notranslate"><span class="pre">pass</span></code>: Pass the main input through.</p></li>
</ul>
</p></li>
<li><p><strong>eval</strong> – <p>Set when the expressions for x, and y are evaluated.
It accepts the following values:</p>
<ul>
<li><dl class="simple">
<dt><code class="docutils literal notranslate"><span class="pre">init</span></code>: only evaluate expressions once during the filter initialization or when a command is</dt><dd><p>processed</p>
</dd>
</dl>
</li>
<li><p><code class="docutils literal notranslate"><span class="pre">frame</span></code>: evaluate expressions for each incoming frame</p></li>
</ul>
<p>Default value is <code class="docutils literal notranslate"><span class="pre">frame</span></code>.</p>
</p></li>
<li><p><strong>shortest</strong> – If set to 1, force the output to terminate when the shortest input terminates. Default value is 0.</p></li>
<li><p><strong>format</strong> – <p>Set the format for the output video.
It accepts the following values:</p>
<ul>
<li><p><code class="docutils literal notranslate"><span class="pre">yuv420</span></code>: force YUV420 output</p></li>
<li><p><code class="docutils literal notranslate"><span class="pre">yuv422</span></code>: force YUV422 output</p></li>
<li><p><code class="docutils literal notranslate"><span class="pre">yuv444</span></code>: force YUV444 output</p></li>
<li><p><code class="docutils literal notranslate"><span class="pre">rgb</span></code>: force packed RGB output</p></li>
<li><p><code class="docutils literal notranslate"><span class="pre">gbrp</span></code>: force planar RGB output</p></li>
</ul>
<p>Default value is <code class="docutils literal notranslate"><span class="pre">yuv420</span></code>.</p>
</p></li>
<li><p><strong>rgb</strong> (<em>deprecated</em>) – If set to 1, force the filter to accept inputs in the RGB color space. Default value is 0.
This option is deprecated, use format instead.</p></li>
<li><p><strong>repeatlast</strong> – If set to 1, force the filter to draw the last overlay frame over the main input until the end of
the stream. A value of 0 disables this behavior. Default value is 1.</p></li>
</ul>
</dd>
</dl>
<p>Official documentation: <a class="reference external" href="https://ffmpeg.org/ffmpeg-filters.html#overlay-1">overlay</a></p>
</dd></dl>
<dl class="function">
<dt id="ffmpeg.setpts">
<code class="sig-prename descclassname">ffmpeg.</code><code class="sig-name descname">setpts</code><span class="sig-paren">(</span><em class="sig-param">stream</em>, <em class="sig-param">expr</em><span class="sig-paren">)</span><a class="headerlink" href="#ffmpeg.setpts" title="Permalink to this definition"></a></dt>
<dd><p>Change the PTS (presentation timestamp) of the input frames.</p>
<dl class="field-list simple">
<dt class="field-odd">Parameters</dt>
<dd class="field-odd"><p><strong>expr</strong> – The expression which is evaluated for each frame to construct its timestamp.</p>
</dd>
</dl>
<p>Official documentation: <a class="reference external" href="https://ffmpeg.org/ffmpeg-filters.html#setpts_002c-asetpts">setpts, asetpts</a></p>
</dd></dl>
<dl class="function">
<dt id="ffmpeg.trim">
<code class="sig-prename descclassname">ffmpeg.</code><code class="sig-name descname">trim</code><span class="sig-paren">(</span><em class="sig-param">stream</em>, <em class="sig-param">**kwargs</em><span class="sig-paren">)</span><a class="headerlink" href="#ffmpeg.trim" title="Permalink to this definition"></a></dt>
<dd><p>Trim the input so that the output contains one continuous subpart of the input.</p>
<dl class="field-list simple">
<dt class="field-odd">Parameters</dt>
<dd class="field-odd"><ul class="simple">
<li><p><strong>start</strong> – Specify the time of the start of the kept section, i.e. the frame with the timestamp start will be the
first frame in the output.</p></li>
<li><p><strong>end</strong> – Specify the time of the first frame that will be dropped, i.e. the frame immediately preceding the one
with the timestamp end will be the last frame in the output.</p></li>
<li><p><strong>start_pts</strong> – This is the same as start, except this option sets the start timestamp in timebase units instead of
seconds.</p></li>
<li><p><strong>end_pts</strong> – This is the same as end, except this option sets the end timestamp in timebase units instead of
seconds.</p></li>
<li><p><strong>duration</strong> – The maximum duration of the output in seconds.</p></li>
<li><p><strong>start_frame</strong> – The number of the first frame that should be passed to the output.</p></li>
<li><p><strong>end_frame</strong> – The number of the first frame that should be dropped.</p></li>
</ul>
</dd>
</dl>
<p>Official documentation: <a class="reference external" href="https://ffmpeg.org/ffmpeg-filters.html#trim">trim</a></p>
</dd></dl>
<dl class="function">
<dt id="ffmpeg.vflip">
<code class="sig-prename descclassname">ffmpeg.</code><code class="sig-name descname">vflip</code><span class="sig-paren">(</span><em class="sig-param">stream</em><span class="sig-paren">)</span><a class="headerlink" href="#ffmpeg.vflip" title="Permalink to this definition"></a></dt>
<dd><p>Flip the input video vertically.</p>
<p>Official documentation: <a class="reference external" href="https://ffmpeg.org/ffmpeg-filters.html#vflip">vflip</a></p>
</dd></dl>
<dl class="function">
<dt id="ffmpeg.zoompan">
<code class="sig-prename descclassname">ffmpeg.</code><code class="sig-name descname">zoompan</code><span class="sig-paren">(</span><em class="sig-param">stream</em>, <em class="sig-param">**kwargs</em><span class="sig-paren">)</span><a class="headerlink" href="#ffmpeg.zoompan" title="Permalink to this definition"></a></dt>
<dd><p>Apply Zoom &amp; Pan effect.</p>
<dl class="field-list simple">
<dt class="field-odd">Parameters</dt>
<dd class="field-odd"><ul class="simple">
<li><p><strong>zoom</strong> – Set the zoom expression. Default is 1.</p></li>
<li><p><strong>x</strong> – Set the x expression. Default is 0.</p></li>
<li><p><strong>y</strong> – Set the y expression. Default is 0.</p></li>
<li><p><strong>d</strong> – Set the duration expression in number of frames. This sets for how many number of frames effect will last
for single input image.</p></li>
<li><p><strong>s</strong> – Set the output image size, default is <code class="docutils literal notranslate"><span class="pre">hd720</span></code>.</p></li>
<li><p><strong>fps</strong> – Set the output frame rate, default is 25.</p></li>
<li><p><strong>z</strong> – Alias for <code class="docutils literal notranslate"><span class="pre">zoom</span></code>.</p></li>
</ul>
</dd>
</dl>
<p>Official documentation: <a class="reference external" href="https://ffmpeg.org/ffmpeg-filters.html#zoompan">zoompan</a></p>
</dd></dl>
</div>
<div class="section" id="indices-and-tables">
<h1>Indices and tables<a class="headerlink" href="#indices-and-tables" title="Permalink to this headline"></a></h1>
<ul class="simple">
<li><p><a class="reference internal" href="genindex.html"><span class="std std-ref">Index</span></a></p></li>
<li><p><a class="reference internal" href="py-modindex.html"><span class="std std-ref">Module Index</span></a></p></li>
<li><p><a class="reference internal" href="search.html"><span class="std std-ref">Search Page</span></a></p></li>
</ul>
</div>
</div>
</div>
</div>
<div class="sphinxsidebar" role="navigation" aria-label="main navigation">
<div class="sphinxsidebarwrapper">
<h3><a href="#">Table of Contents</a></h3>
<ul>
<li><a class="reference internal" href="#">ffmpeg-python: Python bindings for FFmpeg</a></li>
<li><a class="reference internal" href="#indices-and-tables">Indices and tables</a></li>
</ul>
<div role="note" aria-label="source link">
<h3>This Page</h3>
<ul class="this-page-menu">
<li><a href="_sources/index.rst.txt"
rel="nofollow">Show Source</a></li>
</ul>
</div>
<div id="searchbox" style="display: none" role="search">
<h3 id="searchlabel">Quick search</h3>
<div class="searchformwrapper">
<form class="search" action="search.html" method="get">
<input type="text" name="q" aria-labelledby="searchlabel" />
<input type="submit" value="Go" />
</form>
</div>
</div>
<script type="text/javascript">$('#searchbox').show(0);</script>
</div>
</div>
<div class="clearer"></div>
</div>
<div class="related" role="navigation" aria-label="related navigation">
<h3>Navigation</h3>
<ul>
<li class="right" style="margin-right: 10px">
<a href="genindex.html" title="General Index"
>index</a></li>
<li class="right" >
<a href="py-modindex.html" title="Python Module Index"
>modules</a> |</li>
<li class="nav-item nav-item-0"><a href="#">ffmpeg-python documentation</a> &#187;</li>
</ul>
</div>
<div class="footer" role="contentinfo">
&#169; Copyright 2017, Karl Kroening.
Created using <a href="http://sphinx-doc.org/">Sphinx</a> 2.1.0.
</div>
</body>
</html>
Reference in New Issue View Git Blame Copy Permalink