How to Detect is video filter is installed

[vlkc]

Hello, how can I detect is there installed video filter on client side or not? Now I use iframe and html code in it:

  Result:= '<OBJECT ID="MediaPlayer" WIDTH="640" HEIGHT="480" CLASSID="CLSID:55D1139D-5E0D-4123-9AED-575D7B039569"' +
           'STANDBY="Loading Windows Media Player components..." TYPE="application/x-oleobject">' +
           '<PARAM NAME="FileName" VALUE="rtsp://...">' +
           '<PARAM name="ShowControls" VALUE="false">' +
           '<param name="ShowStatusBar" value="false">' +
           '<PARAM name="ShowDisplay" VALUE="false">' +
           '<PARAM name="autostart" VALUE="true">' +
           '<EMBED TYPE="application/x-mplayer2" SRC="rtsp://..." NAME="MediaPlayer"' +
           ' WIDTH="640" HEIGHT="480" ShowControls="0" ShowStatusBar="0" ShowDisplay="0" autostart="1"> </EMBED>' +
           '</OBJECT>';

If the filter is installed on client PC, then video stream form camera comes. But if there is no filter installed then how can I check, download it and install?