php使用ffmpeg获取视频信息并截图的实现方法

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_fullname\n");
}
if (php_sapi_name() != 'cli') {
  echo '
';
}
printf("ffmpeg-php version string: %s\n", ffmpeg_php_version_string);
printf("ffmpeg-php build date string: %s\n", ffmpeg_php_build_date_string);
printf("libavcodec build number: %d\n", libavcodec_build_number);
printf("libavcodec version number: %d\n", libavcodec_version_number);
print_class_methods("ffmpeg_movie");
print_class_methods("ffmpeg_frame");
// get an array for movies from the test media directory
$movies = getdirfiles(dirname(__file__) . '/tests/test_media');
echo "--------------------\n\n";
foreach($movies as $movie) {
  $mov = new ffmpeg_movie($movie);
  printf("file name = %s\n", $mov->getfilename());
  printf("duration = %s seconds\n", $mov->getduration());
  printf("frame count = %s\n", $mov->getframecount());
  printf("frame rate = %0.3f fps\n", $mov->getframerate());
  printf("comment = %s\n", $mov->getcomment());
  printf("title = %s\n", $mov->gettitle());
  printf("author = %s\n", $mov->getauthor());
  printf("copyright = %s\n", $mov->getcopyright());
  printf("get bit rate = %d\n", $mov->getbitrate());
  printf("has audio = %s\n", $mov->hasaudio() == 0 ? 'no' : 'yes');
  if ($mov->hasaudio()) {
    printf("get audio stream id= %s\n", $mov->getaudiostreamid());
    printf("get audio codec = %s\n", $mov->getaudiocodec());
    printf("get audio bit rate = %d\n", $mov->getaudiobitrate());
    printf("get audio sample rate = %d \n", $mov->getaudiosamplerate());
    printf("get audio channels = %s\n", $mov->getaudiochannels());
  }
  printf("has video = %s\n", $mov->hasvideo() == 0 ? 'no' : 'yes');
  if ($mov->hasvideo()) {
    printf("frame height = %d pixels\n", $mov->getframeheight());
    printf("frame width = %d pixels\n", $mov->getframewidth());
    printf("get video stream id= %s\n", $mov->getvideostreamid());
    printf("get video codec = %s\n", $mov->getvideocodec());
    printf("get video bit rate = %d\n", $mov->getvideobitrate());
    printf("get pixel format = %s\n", $mov->getpixelformat());
    printf("get pixel aspect ratio = %s\n", $mov->getpixelaspectratio());
    $frame = $mov->getframe(10);
    printf("get frame = %s\n", is_object($frame) ? 'true' : 'false');
    printf(" get frame number = %d\n", $mov->getframenumber());
    printf(" get frame width = %d\n", $frame->getwidth());
    printf(" get frame height = %d\n", $frame->getheight());
  }
  echo "\n--------------------\n\n";
}
if (php_sapi_name() != 'cli') {
  echo '';
}
/* functions */
function print_class_methods($class) {
  echo "\nmethods available in class '$class':\n";
  $methods = get_class_methods($class);
  if (is_array($methods)) {
    foreach($methods as $method) {
      echo $method . "\n";
    }
  } else {
    echo "no methods defined\n";
  }
}
function getdirfiles($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：

更多关于php相关内容感兴趣的读者可查看本站专题：《php图形与图片操作技巧汇总》、《php操作office文档技巧总结(包括word,excel,access,ppt)》、《php日期与时间用法总结》、《php面向对象程序设计入门教程》、《php字符串(string)用法总结》、《php+mysql数据库操作入门教程》及《php常见数据库操作技巧汇总》

希望本文所述对大家php程序设计有所帮助。