本文实例讲述了PHP从FLV文件获取视频预览图的方法。分享给大家供大家参考。具体实现方法如下：
代码如下:
&1");
$duration = ob_get_contents();
ob_end_clean();
// debug ("Duration: ",$duration);
preg_match('/Duration: (.*?),/',$duration,$matches);
$duration = $matches[1];
// debug ("Duration: ",$duration);
$duration_array = split(':',$duration);
$duration = $duration_array[0] * 3600 + $duration_array[1] * 60 + $duration_array[2];
$time = $duration * $percent / 100;
// debug (" Time: ",$time);
$time = intval($time/3600) . ":" . intval(($time-(intval($time/3600)*3600))/60) . ":" . sprintf("%01.3f",($time-(intval($time/60)*60)));
// debug (" Time: ",$time);
}
$browser = (isset($_GET['browser'])) ? strval($_GET['browser']) : 'true';
// debug (" browser: ",$browser);
if ($browser == "true")
{
header('Content-Type: image/png');
exec("/usr/bin/ffmpeg -vcodec png -i \"" . $videofile . "\" -ss " . $time . " -vframes 1 -f image2 -");
//header('Content-Type: image/jpeg');
//exec("/usr/bin/ffmpeg -vcodec mjpeg -i \"" . $videofile . "\" -ss " . $time . " -vframes 1 -f image2 -");
}
else
{
exec("/usr/bin/ffmpeg -vcodec png -i \"" . $videofile . "\" -ss " . $time . " -vframes 1 -f image2 \"" . $image . "\"%d.png");
//exec("/usr/bin/ffmpeg -vcodec mjpeg -i \"" . $videofile . "\" -ss " . $time . " -vframes 1 -f image2 \"" . $image . "\"%d.jpg");
}
?>
希望本文所述对大家的PHP程序设计有所帮助。
