You are likely missing the video codec for the file you are trying to play.
Try playing the video in desktop-mode with VLC (http://www.videolan.org/) and see if that works.
If it plays, you can use VLC to see what video codec is used by going into Tools > Media Information.
all the videos are playing with vlc.but non of them are playing with the metro video app. I cannot install catalyst 12.10 on my laptop since forcing it to install causes bluescreen death. so i have to use this(catalyst 12.8) gpu driver only, win 7 driver given by sony also does the same when installed using device manager.
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