I am in fact capturing a video from a HD camera that is 1600x1200 resolutions and storing it in a MP4 container. The trouble is WMP12 cannot play the video. On the other hand if I record the video in 1920x1080 resolution, WMP plays the video devoid of a trouble. The similar 1600x1200 file can be played by means of VLC. Can someone provide a solution for this issue? Should you require a taster file do let me know about it?