220 lines
12 KiB
HTML
220 lines
12 KiB
HTML
|
|
||
|
|
<!DOCTYPE html>
|
||
|
|
|
||
|
|
<html xmlns="http://www.w3.org/1999/xhtml">
|
||
|
|
<head>
|
||
|
|
<meta charset="utf-8" />
|
||
|
|
<title>sndhdr — Determine type of sound file — Python 3.7.4 documentation</title>
|
||
|
|
<link rel="stylesheet" href="../_static/pydoctheme.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>
|
||
|
|
|
||
|
|
<script type="text/javascript" src="../_static/sidebar.js"></script>
|
||
|
|
|
||
|
|
<link rel="search" type="application/opensearchdescription+xml"
|
||
|
|
title="Search within Python 3.7.4 documentation"
|
||
|
|
href="../_static/opensearch.xml"/>
|
||
|
|
<link rel="author" title="About these documents" href="../about.html" />
|
||
|
|
<link rel="index" title="Index" href="../genindex.html" />
|
||
|
|
<link rel="search" title="Search" href="../search.html" />
|
||
|
|
<link rel="copyright" title="Copyright" href="../copyright.html" />
|
||
|
|
<link rel="next" title="ossaudiodev — Access to OSS-compatible audio devices" href="ossaudiodev.html" />
|
||
|
|
<link rel="prev" title="imghdr — Determine the type of an image" href="imghdr.html" />
|
||
|
|
<link rel="shortcut icon" type="image/png" href="../_static/py.png" />
|
||
|
|
<link rel="canonical" href="https://docs.python.org/3/library/sndhdr.html" />
|
||
|
|
|
||
|
|
<script type="text/javascript" src="../_static/copybutton.js"></script>
|
||
|
|
<script type="text/javascript" src="../_static/switchers.js"></script>
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
<style>
|
||
|
|
@media only screen {
|
||
|
|
table.full-width-table {
|
||
|
|
width: 100%;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
</style>
|
||
|
|
|
||
|
|
|
||
|
|
</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="right" >
|
||
|
|
<a href="ossaudiodev.html" title="ossaudiodev — Access to OSS-compatible audio devices"
|
||
|
|
accesskey="N">next</a> |</li>
|
||
|
|
<li class="right" >
|
||
|
|
<a href="imghdr.html" title="imghdr — Determine the type of an image"
|
||
|
|
accesskey="P">previous</a> |</li>
|
||
|
|
<li><img src="../_static/py.png" alt=""
|
||
|
|
style="vertical-align: middle; margin-top: -1px"/></li>
|
||
|
|
<li><a href="https://www.python.org/">Python</a> »</li>
|
||
|
|
<li>
|
||
|
|
<span class="language_switcher_placeholder">en</span>
|
||
|
|
<span class="version_switcher_placeholder">3.7.4</span>
|
||
|
|
<a href="../index.html">Documentation </a> »
|
||
|
|
</li>
|
||
|
|
|
||
|
|
<li class="nav-item nav-item-1"><a href="index.html" >The Python Standard Library</a> »</li>
|
||
|
|
<li class="nav-item nav-item-2"><a href="mm.html" accesskey="U">Multimedia Services</a> »</li>
|
||
|
|
<li class="right">
|
||
|
|
|
||
|
|
|
||
|
|
<div class="inline-search" style="display: none" role="search">
|
||
|
|
<form class="inline-search" action="../search.html" method="get">
|
||
|
|
<input placeholder="Quick search" type="text" name="q" />
|
||
|
|
<input type="submit" value="Go" />
|
||
|
|
<input type="hidden" name="check_keywords" value="yes" />
|
||
|
|
<input type="hidden" name="area" value="default" />
|
||
|
|
</form>
|
||
|
|
</div>
|
||
|
|
<script type="text/javascript">$('.inline-search').show(0);</script>
|
||
|
|
|
|
||
|
|
</li>
|
||
|
|
|
||
|
|
</ul>
|
||
|
|
</div>
|
||
|
|
|
||
|
|
<div class="document">
|
||
|
|
<div class="documentwrapper">
|
||
|
|
<div class="bodywrapper">
|
||
|
|
<div class="body" role="main">
|
||
|
|
|
||
|
|
<div class="section" id="module-sndhdr">
|
||
|
|
<span id="sndhdr-determine-type-of-sound-file"></span><h1><a class="reference internal" href="#module-sndhdr" title="sndhdr: Determine type of a sound file."><code class="xref py py-mod docutils literal notranslate"><span class="pre">sndhdr</span></code></a> — Determine type of sound file<a class="headerlink" href="#module-sndhdr" title="Permalink to this headline">¶</a></h1>
|
||
|
|
<p><strong>Source code:</strong> <a class="reference external" href="https://github.com/python/cpython/tree/3.7/Lib/sndhdr.py">Lib/sndhdr.py</a></p>
|
||
|
|
<hr class="docutils" id="index-0" />
|
||
|
|
<p>The <a class="reference internal" href="#module-sndhdr" title="sndhdr: Determine type of a sound file."><code class="xref py py-mod docutils literal notranslate"><span class="pre">sndhdr</span></code></a> provides utility functions which attempt to determine the type
|
||
|
|
of sound data which is in a file. When these functions are able to determine
|
||
|
|
what type of sound data is stored in a file, they return a
|
||
|
|
<a class="reference internal" href="collections.html#collections.namedtuple" title="collections.namedtuple"><code class="xref py py-func docutils literal notranslate"><span class="pre">namedtuple()</span></code></a>, containing five attributes: (<code class="docutils literal notranslate"><span class="pre">filetype</span></code>,
|
||
|
|
<code class="docutils literal notranslate"><span class="pre">framerate</span></code>, <code class="docutils literal notranslate"><span class="pre">nchannels</span></code>, <code class="docutils literal notranslate"><span class="pre">nframes</span></code>, <code class="docutils literal notranslate"><span class="pre">sampwidth</span></code>). The value for <em>type</em>
|
||
|
|
indicates the data type and will be one of the strings <code class="docutils literal notranslate"><span class="pre">'aifc'</span></code>, <code class="docutils literal notranslate"><span class="pre">'aiff'</span></code>,
|
||
|
|
<code class="docutils literal notranslate"><span class="pre">'au'</span></code>, <code class="docutils literal notranslate"><span class="pre">'hcom'</span></code>, <code class="docutils literal notranslate"><span class="pre">'sndr'</span></code>, <code class="docutils literal notranslate"><span class="pre">'sndt'</span></code>, <code class="docutils literal notranslate"><span class="pre">'voc'</span></code>, <code class="docutils literal notranslate"><span class="pre">'wav'</span></code>, <code class="docutils literal notranslate"><span class="pre">'8svx'</span></code>,
|
||
|
|
<code class="docutils literal notranslate"><span class="pre">'sb'</span></code>, <code class="docutils literal notranslate"><span class="pre">'ub'</span></code>, or <code class="docutils literal notranslate"><span class="pre">'ul'</span></code>. The <em>sampling_rate</em> will be either the actual
|
||
|
|
value or <code class="docutils literal notranslate"><span class="pre">0</span></code> if unknown or difficult to decode. Similarly, <em>channels</em> will be
|
||
|
|
either the number of channels or <code class="docutils literal notranslate"><span class="pre">0</span></code> if it cannot be determined or if the
|
||
|
|
value is difficult to decode. The value for <em>frames</em> will be either the number
|
||
|
|
of frames or <code class="docutils literal notranslate"><span class="pre">-1</span></code>. The last item in the tuple, <em>bits_per_sample</em>, will either
|
||
|
|
be the sample size in bits or <code class="docutils literal notranslate"><span class="pre">'A'</span></code> for A-LAW or <code class="docutils literal notranslate"><span class="pre">'U'</span></code> for u-LAW.</p>
|
||
|
|
<dl class="function">
|
||
|
|
<dt id="sndhdr.what">
|
||
|
|
<code class="descclassname">sndhdr.</code><code class="descname">what</code><span class="sig-paren">(</span><em>filename</em><span class="sig-paren">)</span><a class="headerlink" href="#sndhdr.what" title="Permalink to this definition">¶</a></dt>
|
||
|
|
<dd><p>Determines the type of sound data stored in the file <em>filename</em> using
|
||
|
|
<a class="reference internal" href="#sndhdr.whathdr" title="sndhdr.whathdr"><code class="xref py py-func docutils literal notranslate"><span class="pre">whathdr()</span></code></a>. If it succeeds, returns a namedtuple as described above, otherwise
|
||
|
|
<code class="docutils literal notranslate"><span class="pre">None</span></code> is returned.</p>
|
||
|
|
<div class="versionchanged">
|
||
|
|
<p><span class="versionmodified changed">Changed in version 3.5: </span>Result changed from a tuple to a namedtuple.</p>
|
||
|
|
</div>
|
||
|
|
</dd></dl>
|
||
|
|
|
||
|
|
<dl class="function">
|
||
|
|
<dt id="sndhdr.whathdr">
|
||
|
|
<code class="descclassname">sndhdr.</code><code class="descname">whathdr</code><span class="sig-paren">(</span><em>filename</em><span class="sig-paren">)</span><a class="headerlink" href="#sndhdr.whathdr" title="Permalink to this definition">¶</a></dt>
|
||
|
|
<dd><p>Determines the type of sound data stored in a file based on the file header.
|
||
|
|
The name of the file is given by <em>filename</em>. This function returns a namedtuple as
|
||
|
|
described above on success, or <code class="docutils literal notranslate"><span class="pre">None</span></code>.</p>
|
||
|
|
<div class="versionchanged">
|
||
|
|
<p><span class="versionmodified changed">Changed in version 3.5: </span>Result changed from a tuple to a namedtuple.</p>
|
||
|
|
</div>
|
||
|
|
</dd></dl>
|
||
|
|
|
||
|
|
</div>
|
||
|
|
|
||
|
|
|
||
|
|
</div>
|
||
|
|
</div>
|
||
|
|
</div>
|
||
|
|
<div class="sphinxsidebar" role="navigation" aria-label="main navigation">
|
||
|
|
<div class="sphinxsidebarwrapper">
|
||
|
|
<h4>Previous topic</h4>
|
||
|
|
<p class="topless"><a href="imghdr.html"
|
||
|
|
title="previous chapter"><code class="xref py py-mod docutils literal notranslate"><span class="pre">imghdr</span></code> — Determine the type of an image</a></p>
|
||
|
|
<h4>Next topic</h4>
|
||
|
|
<p class="topless"><a href="ossaudiodev.html"
|
||
|
|
title="next chapter"><code class="xref py py-mod docutils literal notranslate"><span class="pre">ossaudiodev</span></code> — Access to OSS-compatible audio devices</a></p>
|
||
|
|
<div role="note" aria-label="source link">
|
||
|
|
<h3>This Page</h3>
|
||
|
|
<ul class="this-page-menu">
|
||
|
|
<li><a href="../bugs.html">Report a Bug</a></li>
|
||
|
|
<li>
|
||
|
|
<a href="https://github.com/python/cpython/blob/3.7/Doc/library/sndhdr.rst"
|
||
|
|
rel="nofollow">Show Source
|
||
|
|
</a>
|
||
|
|
</li>
|
||
|
|
</ul>
|
||
|
|
</div>
|
||
|
|
</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="right" >
|
||
|
|
<a href="ossaudiodev.html" title="ossaudiodev — Access to OSS-compatible audio devices"
|
||
|
|
>next</a> |</li>
|
||
|
|
<li class="right" >
|
||
|
|
<a href="imghdr.html" title="imghdr — Determine the type of an image"
|
||
|
|
>previous</a> |</li>
|
||
|
|
<li><img src="../_static/py.png" alt=""
|
||
|
|
style="vertical-align: middle; margin-top: -1px"/></li>
|
||
|
|
<li><a href="https://www.python.org/">Python</a> »</li>
|
||
|
|
<li>
|
||
|
|
<span class="language_switcher_placeholder">en</span>
|
||
|
|
<span class="version_switcher_placeholder">3.7.4</span>
|
||
|
|
<a href="../index.html">Documentation </a> »
|
||
|
|
</li>
|
||
|
|
|
||
|
|
<li class="nav-item nav-item-1"><a href="index.html" >The Python Standard Library</a> »</li>
|
||
|
|
<li class="nav-item nav-item-2"><a href="mm.html" >Multimedia Services</a> »</li>
|
||
|
|
<li class="right">
|
||
|
|
|
||
|
|
|
||
|
|
<div class="inline-search" style="display: none" role="search">
|
||
|
|
<form class="inline-search" action="../search.html" method="get">
|
||
|
|
<input placeholder="Quick search" type="text" name="q" />
|
||
|
|
<input type="submit" value="Go" />
|
||
|
|
<input type="hidden" name="check_keywords" value="yes" />
|
||
|
|
<input type="hidden" name="area" value="default" />
|
||
|
|
</form>
|
||
|
|
</div>
|
||
|
|
<script type="text/javascript">$('.inline-search').show(0);</script>
|
||
|
|
|
|
||
|
|
</li>
|
||
|
|
|
||
|
|
</ul>
|
||
|
|
</div>
|
||
|
|
<div class="footer">
|
||
|
|
© <a href="../copyright.html">Copyright</a> 2001-2019, Python Software Foundation.
|
||
|
|
<br />
|
||
|
|
The Python Software Foundation is a non-profit corporation.
|
||
|
|
<a href="https://www.python.org/psf/donations/">Please donate.</a>
|
||
|
|
<br />
|
||
|
|
Last updated on Jul 13, 2019.
|
||
|
|
<a href="../bugs.html">Found a bug</a>?
|
||
|
|
<br />
|
||
|
|
Created using <a href="http://sphinx.pocoo.org/">Sphinx</a> 2.0.1.
|
||
|
|
</div>
|
||
|
|
|
||
|
|
</body>
|
||
|
|
</html>
|