php使用ffmpeg获取上传的视频的时长，码率等信息
<p>视频上传是程序员在很多时候需要用到的操作，然而上传完视频肯定要获得一些视频的详细信息，php本身是不支持信息获取的 ，所以采用ffmpeg第三方插件</p><p>首先你需要下载ffmpeg文件：官网地址：https://ffmpeg.zeranoe.com/builds/</p>
<p>然后解压完文件是这种格式的</p>
<p><img src="https://img2018.cnblogs.com/blog/1001115/201905/1001115-20190507153011459-705520004.png"></p>
<p> </p>
<p>然后配置ffmpeg本地环境变量，具体操作不做展示</p>
<p> </p>
<p>然后进入命令行 输入ffmpeg</p>
<p><img src="https://img2018.cnblogs.com/blog/1001115/201905/1001115-20190507153139162-556839034.png"></p>
<p> </p>
<p>如果正常显示信息 表示本地变量配置正确</p>
<p> </p>
<p>在php里新建一个类 </p>
<pre><?php<br>/**<br> * Created by PhpStorm.<br> * User: Administrator<br> * Date: 2019/5/7<br> * Time: 14:01<br> */<br>namespace app\index\controller;<br>use app\common\controller\Frontend;<br>class Video extends Frontend{<br><br> /*******************<br> 支持的格式 rmvb，wmv，mkv，3gp，mp4，mpg，avi，mp3<br> *******************/<br> private $ffmpeg_url = '你的ffmpeg安装目录 -i "%s" 2>&1';<br> public $err = '';<br><br> //获得视频文件的具体信息<br> function getContent($file)<br> {<br> /////$file为视频上传目录 <br> $command = sprintf($this->ffmpeg_url, $file);//你的安装路径<br> ob_start();<br> passthru($command);<br> $info = ob_get_contents();<br> ob_end_clean();<br> $data = array();<br> if (preg_match("/Duration: (.*?), start: (.*?), bitrate: (\d*) kb\/s/", $info, $match)) {<br> $arr_duration = explode(':', $match);<br> $data['seconds'] = $arr_duration * 3600 + $arr_duration * 60 + $arr_duration; //转换播放时间为秒数<br> $data['start'] = $match; //开始时间<br> $data['bitrate'] = $match; //码率(kb)<br> }<br> if (preg_match("/Video: (.*?), (.*?), (.*?)[,\s]/", $info, $match)) {<br><br> $data['vcodec'] = $match; //视频编码格式<br> $data['vformat'] = $match; //视频格式<br> $data['resolution'] = $match; //视频分辨率<br> $arr_resolution = explode('x', $match);<br> $data['width'] = $arr_resolution;<br>// $data['height'] = $arr_resolution;<br> }<br> if (preg_match("/Audio: (\w*), (\d*) Hz/", $info, $match)) {<br> $data['acodec'] = $match; //音频编码<br> $data['asamplerate'] = $match; //音频采样频率<br> }<br> if (isset($data['seconds']) && isset($data['start'])) {<br> $data['play_time'] = $data['seconds'] + $data['start']; //实际播放时间<br> }<br> $data['size'] = filesize($file); //文件大小<br> return json($data);<br> }<br><br>}<br><br></pre>
<p>然后就会正常返回视频信息</p>
<p> <img src="https://img2018.cnblogs.com/blog/1001115/201905/1001115-20190507163008780-1562322571.png"></p>
<p> </p>
<p> </p>
<p> 此时 php使用ffmpeg获取上传信息已经处理完成，</p>
<p> </p>
<p> </p>
<h1 class="YaHei"> </h1><br><br>
来源：https://www.cnblogs.com/phpclass/p/10825847.html
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