Embedded Mov Player

I hav a code like this.

function play_file($desc,$file,$bgcolor='#C3E8FF')
{
echo '<h2>'.$desc.'</h2>';
echo  '
      <object classid="clsid:02BF25D5-8C17-4B23-BC80-D3488ABDDC6B"
              codebase="http://www.apple.com/qtactivex/qtplugin.cab"
              width="320" height="200"  >
      <param name="src" value="'.$file.'">
      <param name="autoplay" value="true">
      <param name="controller" value="true">
      <param name="loop" value="false">
      <param name="bgcolor" value="'.$bgcolor.'">
      <embed src="'.$file.'"
             autostart="true" loop="false"
             width="300" height="200"
             controller="true"
             pluginspage="http://www.apple.com/quicktime/download/"
             bgcolor="'.$bgcolor.'"></embed>
      </object>
      ';
}

PHP:

The question is, I cannot pre-determine the size of the mov file. In this case, I preset it 300x200. But a mov file with no image, the play will looks ugly. Is there any method to specify the dimension properly?