not already meet these requirements, you may have to scale, crop or add black borders to the picture to make it compliant.
==== 11.8.1.1. Format Constrai... aspect (most recent action movies), you will have to add black borders or crop the movie down to 16:9 to make a DVD or VCD. If you add black borders, try ... he file. During playback the aspect ratio is used to restore the video to the correct size.
16:9 or "Widescreen"
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-l... cate frames. This works rather well when muxing into an AVI file, but is almost guaranteed to fail to maintain A/V sync with other muxers such as MPEG.
