i have a video that i cannot render in Graph Edit:

GSpot cannot render:

and AVISynth's DirectShowSource cannot open:

And yet Windows Media Player (12) can play it fine.
How can i figure out the filters that Windows Media Player is using, when DirectShow itself cannot render the file?
i tried running GraphEdit as an adminstrator and connecting to a remote graph, but Windows Media Player does not register its graph in the running objects table:

Related question: How can i access a file in AviSynth that Windows Media Player can play, but DirectShow cannot?