php使用ffmpeg获取视频信息并截图的实现方法

前端技术 2023/09/02 PHP

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：

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