php 调用ffmpeg获取视频信息的简单实现

<?php
// 定义ffmpeg路径及命令常量
define('FFMPEG_CMD', '/usr/local/bin/ffmpeg -i "%s" 2>&1');

/
  使用ffmpeg获取视频信息
  @param String $file 视频文件
  @return Array
 /
function getVideoInfo($file){
 ob_start();
 passthru(sprintf(FFMPEG_CMD, $file));
 $video_info = ob_get_contents();
 ob_end_clean();

 // 使用输出缓冲，获取ffmpeg所有输出内容
 $ret = array();

 // Duration: 00:33:42.64, start: 0.000000, bitrate: 152 kb/s
 if (preg_match("/Duration: (.?), start: (.?), bitrate: (\d) kb\/s/", $video_info, $matches)){
  $ret['duration'] = $matches[1]; // 视频长度
  $duration = explode(':', $matches[1]);
  $ret['seconds'] = $duration[0]3600 + $duration[1]60 + $duration[2]; // 转为秒数
  $ret['start'] = $matches[2]; // 开始时间
  $ret['bitrate'] = $matches[3]; // bitrate 码率 单位kb
 }

 // Stream #0:1: Video: rv20 (RV20 / 0x30325652), yuv420p, 352x288, 117 kb/s, 15 fps, 15 tbr, 1k tbn, 1k tbc
 if(preg_match("/Video: (.?), (.?), (.?)[,\s]/", $video_info, $matches)){
  $ret['vcodec'] = $matches[1];  // 编码格式
  $ret['vformat'] = $matches[2]; // 视频格式
  $ret['resolution'] = $matches[3]; // 分辨率
  list($width, $height) = explode('x', $matches[3]);
  $ret['width'] = $width;
  $ret['height'] = $height;
 }

 // Stream #0:0: Audio: cook (cook / 0x6B6F6F63), 22050 Hz, stereo, fltp, 32 kb/s
 if(preg_match("/Audio: (.), (\d) Hz/", $video_info, $matches)){
  $ret['acodec'] = $matches[1];  // 音频编码
  $ret['asamplerate'] = $matches[2]; // 音频采样频率
 }

 if(isset($ret['seconds']) && isset($ret['start'])){
  $ret['play_time'] = $ret['seconds'] + $ret['start']; // 实际播放时间
 }

 $ret['size'] = filesize($file); // 视频文件大小
 $video_info = iconv('gbk','utf8', $video_info);
 return array($ret, $video_info);

}

// 输出视频信息
$video_info = getVideoInfo('myvideo.avi');
print_r($video_info[0]);
?>

Array
(
 [duration] => 00:33:42.64
 [seconds] => 2022.64
 [start] => 0.000000
 [bitrate] => 152
 [vcodec] => rv20 (RV20 / 0x30325652)
 [vformat] => yuv420p
 [resolution] => 352x288
 [width] => 352
 [height] => 288
 [acodec] => cook (cook / 0x6B6F6F63)
 [asamplerate] => 22050
 [play_time] => 2022.64
 [size] => 38630744
)