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 ... 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. This is why it is necessary to append the harddup video filter at the end of the filter chain to avoid this kind of problem. You can find more tec
