本文实例讲述了php使用ffmpeg获取视频信息并截图的方法。分享给大家供大家参考，具体如下：

$movie = new ffmpeg_movie('4.mp4'); $width=$movie->getFrameWidth(); $height=$movie->getFrameHeight(); $count= $movie->getFrameCount(); print $count . ''; $n = round ( $count/16 ); print $n . ''; for ( $i = 1; $i <= 1; $i ++ ) { $img = 'screencap' . $i . '.png'; $x = $n * $i; $f = $movie->getFrame($x); $gd_image = $f->toGDImage(); imagepng($gd_image, $img); imagedestroy($gd_image); echo " n"; } $extension = "ffmpeg"; $extension_soname = $extension . "." . PHP_SHLIB_SUFFIX; $extension_fullname = PHP_EXTENSION_DIR . "/" . $extension_soname; // load extension if (!extension_loaded($extension)) { dl($extension_soname) or die("Can't load extension $extension_fullnamen"); } if (php_sapi_name() != 'cli') { echo ' '; } printf("ffmpeg-php version string: %sn", FFMPEG_PHP_VERSION_STRING); printf("ffmpeg-php build date string: %sn", FFMPEG_PHP_BUILD_DATE_STRING); printf("libavcodec build number: %dn", LIBAVCODEC_BUILD_NUMBER); printf("libavcodec version number: %dn", LIBAVCODEC_VERSION_NUMBER); print_class_methods("ffmpeg_movie"); print_class_methods("ffmpeg_frame"); // get an array for movies from the test media directory $movies = getDirFiles(dirname(__FILE__) . '/tests/test_media'); echo "--------------------nn"; foreach($movies as $movie) { $mov = new ffmpeg_movie($movie); printf("file name = %sn", $mov->getFileName()); printf("duration = %s secondsn", $mov->getDuration()); printf("frame count = %sn", $mov->getFrameCount()); printf("frame rate = %0.3f fpsn", $mov->getFrameRate()); printf("comment = %sn", $mov->getComment()); printf("title = %sn", $mov->getTitle()); printf("author = %sn", $mov->getAuthor()); printf("copyright = %sn", $mov->getCopyright()); printf("get bit rate = %dn", $mov->getBitRate()); printf("has audio = %sn", $mov->hasAudio() == 0 ? 'No' : 'Yes'); if ($mov->hasAudio()) { printf("get audio stream id= %sn", $mov->getAudioStreamId()); printf("get audio codec = %sn", $mov->getAudioCodec()); printf("get audio bit rate = %dn", $mov->getAudioBitRate()); printf("get audio sample rate = %d n", $mov->getAudioSampleRate()); printf("get audio channels = %sn", $mov->getAudioChannels()); } printf("has video = %sn", $mov->hasVideo() == 0 ? 'No' : 'Yes'); if ($mov->hasVideo()) { printf("frame height = %d pixelsn", $mov->getFrameHeight()); printf("frame width = %d pixelsn", $mov->getFrameWidth()); printf("get video stream id= %sn", $mov->getVideoStreamId()); printf("get video codec = %sn", $mov->getVideoCodec()); printf("get video bit rate = %dn", $mov->getVideoBitRate()); printf("get pixel format = %sn", $mov->getPixelFormat()); printf("get pixel aspect ratio = %sn", $mov->getPixelAspectRatio()); $frame = $mov->getFrame(10); printf("get frame = %sn", is_object($frame) ? 'true' : 'false'); printf(" get frame number = %dn", $mov->getFrameNumber()); printf(" get frame width = %dn", $frame->getWidth()); printf(" get frame height = %dn", $frame->getHeight()); } echo "n--------------------nn"; } if (php_sapi_name() != 'cli') { echo ''; } /* FUNCTIONS */ function print_class_methods($class) { echo "nMethods available in class '$class':n"; $methods = get_class_methods($class); if (is_array($methods)) { foreach($methods as $method) { echo $method . "n"; } } else { echo "No Methods Definedn"; } } function getDirFiles($dirPath) { if ($handle = opendir($dirPath)) { while (false !== ($file = readdir($handle))) { $fullpath = $dirPath . '/' . $file; if (!is_dir($fullpath) && $file != "CVS" && $file != "." && $file != "..") $filesArr[] = trim($fullpath); } closedir($handle); } return $filesArr; } ?>

运行效果如下图所示：

希望本文所述对大家PHP程序设计有所帮助。