PHP使用ffmpeg实现视频随机截图并转成图片
<div id="navCategory"><h5 class="catalogue">目录</h5><ul class="first_class_ul"><li><a href="#_label0">安装FFmpeg软件</a></li><li><a href="#_label1">安装PHP扩展</a></li><li><a href="#_label2">实现视频截图功能</a></li></ul></div><p class="maodian"><a name="_label0"></a></p><h2>安装FFmpeg软件</h2><p>在CentOS 7系统上安装FFmpeg需要添加第三方仓库并执行安装命令：</p>
<div class="jb51code"><pre class="brush:bash;">sudo rpm --import http://li.nux.ro/download/nux/RPM-GPG-KEY-nux.ro
sudo rpm -Uvh http://li.nux.ro/download/nux/dextop/el7/x86_64/nux-dextop-release-0-5.el7.nux.noarch.rpm
sudo yum install ffmpeg ffmpeg-devel -y</pre></div>
<p>验证安装是否成功：</p>
<div class="jb51code"><pre class="brush:bash;">ffmpeg -version </pre></div>
<p class="maodian"><a name="_label1"></a></p><h2>安装PHP扩展</h2>
<p>通过Composer安装php-ffmpeg扩展：</p>
<div class="jb51code"><pre class="brush:bash;">composer require php-ffmpeg/php-ffmpeg </pre></div>
<p>检查并启用proc_open函数：</p>
<p>定位PHP配置文件路径：</p>
<div class="jb51code"><pre class="brush:bash;">php -i | grep 'php.ini' </pre></div>
<p>编辑php.ini文件，找到disable_functions配置项，删除proc_open和proc_get_status。重启PHP服务：</p>
<div class="jb51code"><pre class="brush:bash;">service php-fpm restart </pre></div>
<p>验证proc_open是否可用：</p>
<div class="jb51code"><pre class="brush:bash;">php -r "var_dump(function_exists('proc_open'));" </pre></div>
<p class="maodian"><a name="_label2"></a></p><h2>实现视频截图功能</h2>
<p>使用php-ffmpeg扩展从视频中随机截取一帧：</p>
<div class="jb51code"><pre class="brush:php;">require 'vendor/autoload.php';
use FFMpeg\FFMpeg;
use FFMpeg\Coordinate\TimeCode;
$ffmpeg = FFMpeg::create();
$video = $ffmpeg->open('input.mp4');
$duration = $video->getFormat()->get('duration');
$randomTime = mt_rand(1, $duration - 1);
$frame = $video->frame(TimeCode::fromSeconds($randomTime));
$frame->save('random_screenshot.jpg');</pre></div>
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