Sounds like a conflict with codecs to me. I had a similar problem with the Falcon 4 intro movie(black screen, everything freezing, warning dialogue), and it turned out that there was a conflict between ffdshow and a codec included in the game. This problem only occurred when running the game, and the movie would be fine when played separately. I used an application called GSpot to see what codec is needed to play the movie, and then unchecked the codec in ffdshow settings. After that the movie played out fine, since ffdshow didn't kick in and screw with the game's included codec anymore.
|