Home > php教程 > php手册 > body text

PHP从FLV文件获取视频预览图的方法

WBOY
Release: 2016-06-06 20:06:55
Original
1071 people have browsed it

这篇文章主要介绍了PHP从FLV文件获取视频预览图的方法,实例分析了php操作flv文件获取截图的技巧,具有一定参考借鉴价值,需要的朋友可以参考下

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:

复制代码 代码如下:

// references
// generate a preview image from an FLV file on-the-fly, or to save
// call with: ffmpeg_image.php?file=video.flv&time=00:00:05&browser=true
// call with: ffmpeg_image.php?file=video.flv&percent=75.3&browser=true
// no time defaults to "00:00:01" (one second), no browser defaults to "true"
$videofile = (isset($_GET['file'])) ? strval($_GET['file']) : 'video.flv';
$image = substr($videofile, 0, strlen($videofile) - 4);
$time = (isset($_GET['time'])) ? strval($_GET['time']) : '00:00:01';
// debug ("  File: ", $videofile);
// debug (" Image: ", $image);
// debug ("  Time: ", $time);
// check time format
if (!preg_match('/\d\d:\d\d:\d\d/', $time))
{
  $time = "00:00:00";
}
if (isset($_GET['percent']))
{
  $percent = $_GET['percent'];
// debug (" Percent: ", $percent);
  ob_start();
  exec("/usr/bin/ffmpeg -i \"". $videofile . "\" 2>&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。

Related labels:
source:php.cn
Statement of this Website
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn
Popular Recommendations
Popular Tutorials
More>
Latest Downloads
More>
Web Effects
Website Source Code
Website Materials
Front End Template