How to use ffmpeg to obtain video information and take screenshots in php_php tips

The example in this article describes how PHP uses ffmpeg to obtain video information and take screenshots. Share it with everyone for your reference, the details are as follows:

$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", $mov->hasAudio() == 0 &#63; 'No' : 'Yes');
  if ($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", $mov->hasVideo() == 0 &#63; 'No' : 'Yes');
  if ($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) &#63; '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;
}
&#63;>

The operation effect is as shown below:

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I hope this article will be helpful to everyone in PHP programming.