Detecting codecs

Hi

I need to determine at runtime if a codec for MPEG2 video is installed. 
Can anyone tell me where this is stored in the registry or point me in 
the direction of some information about this?

Thanks in advance

With DSPack: http://progdigy.com/modules.php?name=DSPack

Code:
function FindFilter(const CategoryName, FilterName: String): Boolean;
var
   SysDevEnum: TSysDevEnum;
   i, j: Integer;
begin
   Result := False;
   SysDevEnum := TSysDevEnum.Create;
   try
     for i := 0 to SysDevEnum.CountCategories - 1 do
     begin
       SysDevEnum.SelectIndexCategory(i);
       if SysDevEnum.Categories[i].FriendlyName = CategoryName then
       begin
         if SysDevEnum.CountFilters > 0 then
         begin
           for j := 0 to SysDevEnum.CountFilters - 1 do
             if SysDevEnum.Filters[j].FriendlyName = FilterName then
             begin
               Result := True;
               Exit;
             end;
         end;
       end;
     end;
   finally
     SysDevEnum.Free;
   end;
end;

Usage:
if FindFilter('DirectShow Filters', 'Elecard MPEG-2 Video Decoder') then

Although this is a DirectShow solution, AFAIK Vfw codecs are listed in 
the 'Video Compressors' Category.


Pete wrote:
> Hi
> 
> I need to determine at runtime if a codec for MPEG2 video is installed. 
> Can anyone tell me where this is stored in the registry or point me in 
> the direction of some information about this?
> 
> Thanks in advance
> 

Many thanks for that

Had a look at DSPack, but I couldn't get any of the available versions 
or patches to install into D2007 on vista.

harrie wrote:
> With DSPack: http://progdigy.com/modules.php?name=DSPack

   Hi Pete,

This is the code from my CodeRage speech. I also have included a DSPack 
version I have hacked to compile in D2007, so I can make the presentation :

http://www.mitov.com/CodeRage2Code.zip

Cheers,
   Boian

Pete wrote:
> I found this. I managed to get the packages to compile, but the bpl 
> wouldn't install into D2007.
> My problem is I want to find if ANY mpeg2 codec exists not just a