Why Gemfury?
Push, build, and install
RubyGems
npm packages
Python packages
Maven artifacts
PHP packages
Go Modules
Debian packages
RPM packages
NuGet packages
showbox-public / ffmpeg-doc deb
Repository URL to install this package:
|
Version:
7:2.7.1-1ubuntu2 ▾
|
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/xhtml;charset=UTF-8"/>
<meta http-equiv="X-UA-Compatible" content="IE=9"/>
<title>FFmpeg: Evaluating option strings</title>
<link href="tabs.css" rel="stylesheet" type="text/css"/>
<link href="doxygen.css" rel="stylesheet" type="text/css" />
<link href="search/search.css" rel="stylesheet" type="text/css"/>
<script type="text/javascript" src="jquery.js"></script>
<script type="text/javascript" src="search/search.js"></script>
<script type="text/javascript">
$(document).ready(function() { searchBox.OnSelectItem(0); });
</script>
</head>
<body>
<div id="top"><!-- do not remove this div! -->
<div id="titlearea">
<table cellspacing="0" cellpadding="0">
<tbody>
<tr style="height: 56px;">
<td style="padding-left: 0.5em;">
<div id="projectname">FFmpeg
 <span id="projectnumber">2.7.1</span>
</div>
</td>
</tr>
</tbody>
</table>
</div>
<!-- Generated by Doxygen 1.7.6.1 -->
<script type="text/javascript">
var searchBox = new SearchBox("searchBox", "search",false,'Search');
</script>
<div id="navrow1" class="tabs">
<ul class="tablist">
<li><a href="index.html"><span>Main Page</span></a></li>
<li><a href="pages.html"><span>Related Pages</span></a></li>
<li><a href="modules.html"><span>Modules</span></a></li>
<li><a href="annotated.html"><span>Data Structures</span></a></li>
<li><a href="files.html"><span>Files</span></a></li>
<li><a href="examples.html"><span>Examples</span></a></li>
<li>
<div id="MSearchBox" class="MSearchBoxInactive">
<span class="left">
<img id="MSearchSelect" src="search/mag_sel.png"
onmouseover="return searchBox.OnSearchSelectShow()"
onmouseout="return searchBox.OnSearchSelectHide()"
alt=""/>
<input type="text" id="MSearchField" value="Search" accesskey="S"
onfocus="searchBox.OnSearchFieldFocus(true)"
onblur="searchBox.OnSearchFieldFocus(false)"
onkeyup="searchBox.OnSearchFieldChange(event)"/>
</span><span class="right">
<a id="MSearchClose" href="javascript:searchBox.CloseResultsWindow()"><img id="MSearchCloseImg" border="0" src="search/close.png" alt=""/></a>
</span>
</div>
</li>
</ul>
</div>
</div>
<div class="header">
<div class="summary">
<a href="#func-members">Functions</a> </div>
<div class="headertitle">
<div class="title">Evaluating option strings</div> </div>
<div class="ingroups"><a class="el" href="group__avoptions.html">AVOptions</a></div></div><!--header-->
<div class="contents">
<p>This group of functions can be used to evaluate option strings and get numbers out of them.
<a href="#details">More...</a></p>
<table class="memberdecls">
<tr><td colspan="2"><h2><a name="func-members"></a>
Functions</h2></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="group__opt__eval__funcs.html#gae245940b870e13b759354d570decf3dc">av_opt_eval_flags</a> (void *obj, const <a class="el" href="structAVOption.html">AVOption</a> *o, const char *val, int *flags_out)</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="group__opt__eval__funcs.html#ga8bcee89d4a51400092e2d653c842bfa8">av_opt_eval_int</a> (void *obj, const <a class="el" href="structAVOption.html">AVOption</a> *o, const char *val, int *int_out)</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="group__opt__eval__funcs.html#gae2285d602e2079f0df141826fc00c666">av_opt_eval_int64</a> (void *obj, const <a class="el" href="structAVOption.html">AVOption</a> *o, const char *val, int64_t *int64_out)</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="group__opt__eval__funcs.html#ga3c06cf2a2e7efc60d97adbeb7bbb6b44">av_opt_eval_float</a> (void *obj, const <a class="el" href="structAVOption.html">AVOption</a> *o, const char *val, float *float_out)</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="group__opt__eval__funcs.html#gac65f3b9753c48616e8dd4dea0c47f9e6">av_opt_eval_double</a> (void *obj, const <a class="el" href="structAVOption.html">AVOption</a> *o, const char *val, double *double_out)</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="group__opt__eval__funcs.html#gabd95639131aac582a2f7c4bfc5adb4b0">av_opt_eval_q</a> (void *obj, const <a class="el" href="structAVOption.html">AVOption</a> *o, const char *val, <a class="el" href="structAVRational.html">AVRational</a> *q_out)</td></tr>
</table>
<hr/><a name="details" id="details"></a><h2>Detailed Description</h2>
<p>This group of functions can be used to evaluate option strings and get numbers out of them. </p>
<p>They do the same thing as <a class="el" href="group__opt__set__funcs.html#ga5fd4b92bdf4f392a2847f711676a7537">av_opt_set()</a>, except the result is written into the caller-supplied pointer.</p>
<dl class="params"><dt><b>Parameters:</b></dt><dd>
<table class="params">
<tr><td class="paramname">obj</td><td>a struct whose first element is a pointer to <a class="el" href="structAVClass.html" title="Describe the class of an AVClass context structure.">AVClass</a>. </td></tr>
<tr><td class="paramname">o</td><td>an option for which the string is to be evaluated. </td></tr>
<tr><td class="paramname">val</td><td>string to be evaluated. </td></tr>
<tr><td class="paramname">*_out</td><td>value of the string will be written here.</td></tr>
</table>
</dd>
</dl>
<dl class="return"><dt><b>Returns:</b></dt><dd>0 on success, a negative number on failure. </dd></dl>
<hr/><h2>Function Documentation</h2>
<a class="anchor" id="gae245940b870e13b759354d570decf3dc"></a><!-- doxytag: member="opt.h::av_opt_eval_flags" ref="gae245940b870e13b759354d570decf3dc" args="(void *obj, const AVOption *o, const char *val, int *flags_out)" -->
<div class="memitem">
<div class="memproto">
<table class="memname">
<tr>
<td class="memname">int <a class="el" href="group__opt__eval__funcs.html#gae245940b870e13b759354d570decf3dc">av_opt_eval_flags</a> </td>
<td>(</td>
<td class="paramtype">void * </td>
<td class="paramname"><em>obj</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">const <a class="el" href="structAVOption.html">AVOption</a> * </td>
<td class="paramname"><em>o</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">const char * </td>
<td class="paramname"><em>val</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">int * </td>
<td class="paramname"><em>flags_out</em> </td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td>
</tr>
</table>
</div>
<div class="memdoc">
</div>
</div>
<a class="anchor" id="ga8bcee89d4a51400092e2d653c842bfa8"></a><!-- doxytag: member="opt.h::av_opt_eval_int" ref="ga8bcee89d4a51400092e2d653c842bfa8" args="(void *obj, const AVOption *o, const char *val, int *int_out)" -->
<div class="memitem">
<div class="memproto">
<table class="memname">
<tr>
<td class="memname">int <a class="el" href="group__opt__eval__funcs.html#ga8bcee89d4a51400092e2d653c842bfa8">av_opt_eval_int</a> </td>
<td>(</td>
<td class="paramtype">void * </td>
<td class="paramname"><em>obj</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">const <a class="el" href="structAVOption.html">AVOption</a> * </td>
<td class="paramname"><em>o</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">const char * </td>
<td class="paramname"><em>val</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">int * </td>
<td class="paramname"><em>int_out</em> </td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td>
</tr>
</table>
</div>
<div class="memdoc">
</div>
</div>
<a class="anchor" id="gae2285d602e2079f0df141826fc00c666"></a><!-- doxytag: member="opt.h::av_opt_eval_int64" ref="gae2285d602e2079f0df141826fc00c666" args="(void *obj, const AVOption *o, const char *val, int64_t *int64_out)" -->
<div class="memitem">
<div class="memproto">
<table class="memname">
<tr>
<td class="memname">int <a class="el" href="group__opt__eval__funcs.html#gae2285d602e2079f0df141826fc00c666">av_opt_eval_int64</a> </td>
<td>(</td>
<td class="paramtype">void * </td>
<td class="paramname"><em>obj</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">const <a class="el" href="structAVOption.html">AVOption</a> * </td>
<td class="paramname"><em>o</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">const char * </td>
<td class="paramname"><em>val</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">int64_t * </td>
<td class="paramname"><em>int64_out</em> </td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td>
</tr>
</table>
</div>
<div class="memdoc">
</div>
</div>
<a class="anchor" id="ga3c06cf2a2e7efc60d97adbeb7bbb6b44"></a><!-- doxytag: member="opt.h::av_opt_eval_float" ref="ga3c06cf2a2e7efc60d97adbeb7bbb6b44" args="(void *obj, const AVOption *o, const char *val, float *float_out)" -->
<div class="memitem">
<div class="memproto">
<table class="memname">
<tr>
<td class="memname">int <a class="el" href="group__opt__eval__funcs.html#ga3c06cf2a2e7efc60d97adbeb7bbb6b44">av_opt_eval_float</a> </td>
<td>(</td>
<td class="paramtype">void * </td>
<td class="paramname"><em>obj</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">const <a class="el" href="structAVOption.html">AVOption</a> * </td>
<td class="paramname"><em>o</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">const char * </td>
<td class="paramname"><em>val</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">float * </td>
<td class="paramname"><em>float_out</em> </td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td>
</tr>
</table>
</div>
<div class="memdoc">
</div>
</div>
<a class="anchor" id="gac65f3b9753c48616e8dd4dea0c47f9e6"></a><!-- doxytag: member="opt.h::av_opt_eval_double" ref="gac65f3b9753c48616e8dd4dea0c47f9e6" args="(void *obj, const AVOption *o, const char *val, double *double_out)" -->
<div class="memitem">
<div class="memproto">
<table class="memname">
<tr>
<td class="memname">int <a class="el" href="group__opt__eval__funcs.html#gac65f3b9753c48616e8dd4dea0c47f9e6">av_opt_eval_double</a> </td>
<td>(</td>
<td class="paramtype">void * </td>
<td class="paramname"><em>obj</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">const <a class="el" href="structAVOption.html">AVOption</a> * </td>
<td class="paramname"><em>o</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">const char * </td>
<td class="paramname"><em>val</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">double * </td>
<td class="paramname"><em>double_out</em> </td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td>
</tr>
</table>
</div>
<div class="memdoc">
</div>
</div>
<a class="anchor" id="gabd95639131aac582a2f7c4bfc5adb4b0"></a><!-- doxytag: member="opt.h::av_opt_eval_q" ref="gabd95639131aac582a2f7c4bfc5adb4b0" args="(void *obj, const AVOption *o, const char *val, AVRational *q_out)" -->
<div class="memitem">
<div class="memproto">
<table class="memname">
<tr>
<td class="memname">int <a class="el" href="group__opt__eval__funcs.html#gabd95639131aac582a2f7c4bfc5adb4b0">av_opt_eval_q</a> </td>
<td>(</td>
<td class="paramtype">void * </td>
<td class="paramname"><em>obj</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">const <a class="el" href="structAVOption.html">AVOption</a> * </td>
<td class="paramname"><em>o</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">const char * </td>
<td class="paramname"><em>val</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="structAVRational.html">AVRational</a> * </td>
<td class="paramname"><em>q_out</em> </td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td>
</tr>
</table>
</div>
<div class="memdoc">
</div>
</div>
</div><!-- contents -->
<!-- window showing the filter options -->
<div id="MSearchSelectWindow"
onmouseover="return searchBox.OnSearchSelectShow()"
onmouseout="return searchBox.OnSearchSelectHide()"
onkeydown="return searchBox.OnSearchSelectKey(event)">
<a class="SelectItem" href="javascript:void(0)" onclick="searchBox.OnSelectItem(0)"><span class="SelectionMark"> </span>All</a><a class="SelectItem" href="javascript:void(0)" onclick="searchBox.OnSelectItem(1)"><span class="SelectionMark"> </span>Data Structures</a><a class="SelectItem" href="javascript:void(0)" onclick="searchBox.OnSelectItem(2)"><span class="SelectionMark"> </span>Files</a><a class="SelectItem" href="javascript:void(0)" onclick="searchBox.OnSelectItem(3)"><span class="SelectionMark"> </span>Functions</a><a class="SelectItem" href="javascript:void(0)" onclick="searchBox.OnSelectItem(4)"><span class="SelectionMark"> </span>Variables</a><a class="SelectItem" href="javascript:void(0)" onclick="searchBox.OnSelectItem(5)"><span class="SelectionMark"> </span>Typedefs</a><a class="SelectItem" href="javascript:void(0)" onclick="searchBox.OnSelectItem(6)"><span class="SelectionMark"> </span>Enumerations</a><a class="SelectItem" href="javascript:void(0)" onclick="searchBox.OnSelectItem(7)"><span class="SelectionMark"> </span>Enumerator</a><a class="SelectItem" href="javascript:void(0)" onclick="searchBox.OnSelectItem(8)"><span class="SelectionMark"> </span>Defines</a></div>
<!-- iframe showing the search results (closed by default) -->
<div id="MSearchResultsWindow">
<iframe src="javascript:void(0)" frameborder="0"
name="MSearchResults" id="MSearchResults">
</iframe>
</div>
<hr class="footer"/><address class="footer"><small>
Generated by  <a href="http://www.doxygen.org/index.html">
<img class="footer" src="doxygen.png" alt="doxygen"/>
</a> 1.7.6.1
</small></address>
</body>
</html>