| 标题 | PHP从FLV文件获取视频预览图的方法 |
| 内容 | 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： 代码如下: <?php // 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。 |
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