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<!-- vim: set ts=4 sw=4: !-->
<!DOCTYPE html>
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<title>Celluloid - FAQ</title>
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<div class="content">
<div class="markdown-heading"><h2 class="heading-element">How do I use an mpv config file (<code>mpv.conf</code>)?</h2><a id="user-content-how-do-i-use-an-mpv-config-file-mpvconf" class="anchor" aria-label="Permalink: How do I use an mpv config file (mpv.conf)?" href="#how-do-i-use-an-mpv-config-file-mpvconf"><span aria-hidden="true" class="octicon octicon-link"></span></a></div>
<ol>
<li>Open the <code>Preferences</code> dialog (Ctrl + ,).</li>
<li>Switch to the <code>Config Files</code> tab.</li>
<li>Check the <code>Load mpv configuration file</code> checkbox.</li>
<li>Click on the <code>mpv configuration file</code> file chooser button and select your
config file.</li>
<li>Click the close button.</li>
</ol>
<div class="markdown-heading"><h2 class="heading-element">How do I use an input config file (<code>input.conf</code>)?</h2><a id="user-content-how-do-i-use-an-input-config-file-inputconf" class="anchor" aria-label="Permalink: How do I use an input config file (input.conf)?" href="#how-do-i-use-an-input-config-file-inputconf"><span aria-hidden="true" class="octicon octicon-link"></span></a></div>
<ol>
<li>Open the <code>Preferences</code> dialog (Ctrl + ,).</li>
<li>Switch to the <code>Config Files</code> tab.</li>
<li>Check the <code>Load mpv input configuration file</code> checkbox.</li>
<li>Click on the <code>mpv input configuration file</code> file chooser button and select
your config file.</li>
<li>Click the close button.</li>
</ol>
<div class="markdown-heading"><h2 class="heading-element">How do I configure key/mouse bindings?</h2><a id="user-content-how-do-i-configure-keymouse-bindings" class="anchor" aria-label="Permalink: How do I configure key/mouse bindings?" href="#how-do-i-configure-keymouse-bindings"><span aria-hidden="true" class="octicon octicon-link"></span></a></div>
<p>Use an <a href="https://github.com/mpv-player/mpv/blob/master/DOCS/man/input.rst">input config file (<code>input.conf</code>)</a>.</p>
<div class="markdown-heading"><h2 class="heading-element">How do I set mpv options from the command line?</h2><a id="user-content-how-do-i-set-mpv-options-from-the-command-line" class="anchor" aria-label="Permalink: How do I set mpv options from the command line?" href="#how-do-i-set-mpv-options-from-the-command-line"><span aria-hidden="true" class="octicon octicon-link"></span></a></div>
<p>Prefix the option name with <code>mpv-</code>. For example, passing <code>--mpv-vf=vflip</code> to
Celluloid is equivalent to passing <code>--vf=vflip</code> to mpv.</p>
<div class="markdown-heading"><h2 class="heading-element">How do I use loudness normalization?</h2><a id="user-content-how-do-i-use-loudness-normalization" class="anchor" aria-label="Permalink: How do I use loudness normalization?" href="#how-do-i-use-loudness-normalization"><span aria-hidden="true" class="octicon octicon-link"></span></a></div>
<p>Use the <a href="https://ffmpeg.org/ffmpeg-filters.html#loudnorm" rel="nofollow">loudnorm</a> filter. To
enable the filter, add the following line to your mpv config file.</p>
<pre><code>af=lavfi=[loudnorm]
</code></pre>
<p>There's also another filter called
<a href="https://ffmpeg.org/ffmpeg-filters.html#dynaudnorm" rel="nofollow">dynaudnorm</a> that can be used
instead. Check ffmpeg's documentation for details.</p>
<div class="markdown-heading"><h2 class="heading-element">Celluloid takes a long time to start</h2><a id="user-content-celluloid-takes-a-long-time-to-start" class="anchor" aria-label="Permalink: Celluloid takes a long time to start" href="#celluloid-takes-a-long-time-to-start"><span aria-hidden="true" class="octicon octicon-link"></span></a></div>
<p>During startup, Celluloid will attempt to load all hwdec interop contexts. This
can take a long time on machines with multiple GPUs if any of them are in a low
power state. You may be able to speed this up by disabling hwdec interop or
choosing a specific backend using the
<a href="https://mpv.io/manual/stable/#options-gpu-hwdec-interop" rel="nofollow"><code>gpu-hwdec-interop</code></a>
option.</p>
<div class="markdown-heading"><h2 class="heading-element">Celluloid won't start when installed under nonstandard prefix</h2><a id="user-content-celluloid-wont-start-when-installed-under-nonstandard-prefix" class="anchor" aria-label="Permalink: Celluloid won't start when installed under nonstandard prefix" href="#celluloid-wont-start-when-installed-under-nonstandard-prefix"><span aria-hidden="true" class="octicon octicon-link"></span></a></div>
<p>If Celluloid is linked against GLib in a different prefix from the one it's
installed in, you'll need to set the environment variable <code>GSETTINGS_SCHEMA_DIR</code>
to the directory containing Celluloid's GSettings schema files. If you used the
included build script to install, this directory will be at
<code>share/glib-2.0/schemas</code> relative to your prefix. For example, if your prefix is
<code>/opt</code>, you should set <code>GSETTINGS_SCHEMA_DIR</code> to <code>/opt/share/glib-2.0/schemas</code>.</p>
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