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<section id="loadplugin-avisynth-compatibility">
<h1>LoadPlugin (Avisynth Compatibility)<a class="headerlink" href="#loadplugin-avisynth-compatibility" title="Permalink to this heading"></a></h1>
<dl class="py function">
<dt class="sig sig-object py" id="avs.LoadPlugin">
<span class="sig-prename descclassname"><span class="pre">avs.</span></span><span class="sig-name descname"><span class="pre">LoadPlugin</span></span><span class="sig-paren">(</span><em class="sig-param"><span class="n"><span class="pre">string</span> <span class="pre">path</span></span></em><span class="sig-paren">)</span><a class="headerlink" href="#avs.LoadPlugin" title="Permalink to this definition"></a></dt>
<dd><p>Load an Avisynth 2.5 (32 bit only), 2.6 (32 and 64 bit) or Avisynth+ (32 and 64 bit) plugin.
If successful, the loaded plugin’s functions will end up in the avs namespace. Note that
in the case of Avisynth+ there’s no way to use the formats combined with alpha or
higher bitdepth packed RGB. Coincidentally there are no plugins that use this in a
meaningful way yet.</p>
<p>The compatibility module can work with a large number of Avisynth’s plugins.
However, the wrapping is not complete, so the following things will cause
problems:</p>
<blockquote>
<div><ul class="simple">
<li><p>The plugin expects YUY2 or RGB32 input. In this case provide input in
either YUV422P8 or RGB24 format pass compatpack=True as an argument
to the Avisynth function.</p></li>
<li><p>The plugin tries to call env-&gt;invoke().
These calls are ignored when it is safe to do so, but otherwise they
will most likely trigger a fatal error.</p></li>
<li><p>Plugins trying to read global variables.
There are no global variables.</p></li>
</ul>
</div></blockquote>
<p>If there are function name collisions functions will have a number appended
to them to make them distinct. For example if three functions are named
<em>func</em> then they will be named <em>func</em>, <em>func_2</em> and <em>func_3</em>. This means
that Avisynth functions that have multiple overloads (rare) will give
each overload a different name.</p>
<p>Note that if you are really insane you can load Avisynth’s VirtualDub plugin
loader and use VirtualDub plugins as well. Function overloads are very common
when dealing with VirtualDub.</p>
<p>Beware of Python’s escape character, this will fail:</p>
<div class="highlight-default notranslate"><div class="highlight"><pre><span></span><span class="n">LoadPlugin</span><span class="p">(</span><span class="n">path</span><span class="o">=</span><span class="s1">&#39;c:\plugins</span><span class="se">\f</span><span class="s1">ilter.dll&#39;</span><span class="p">)</span>
</pre></div>
</div>
<p>Correct ways:</p>
<div class="highlight-default notranslate"><div class="highlight"><pre><span></span><span class="n">LoadPlugin</span><span class="p">(</span><span class="n">path</span><span class="o">=</span><span class="s1">&#39;c:/plugins/filter.dll&#39;</span><span class="p">)</span>
<span class="n">LoadPlugin</span><span class="p">(</span><span class="n">path</span><span class="o">=</span><span class="sa">r</span><span class="s1">&#39;c:\plugins\filter.dll&#39;</span><span class="p">)</span>
<span class="n">LoadPlugin</span><span class="p">(</span><span class="n">path</span><span class="o">=</span><span class="s1">&#39;c:</span><span class="se">\\</span><span class="s1">plugins</span><span class="se">\\</span><span class="s1">filter.dll&#39;</span><span class="p">)</span>
</pre></div>
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