I have a Java midlet that uses the MMAPI to record video. I can only record video at a resolution of 176x144. If I try a resolution of 352x288, I get a "player creation failed: -6" error.
However, the native video application works fine at that resolution. It seems like this may be a bug in the Java API.
Also, I would have reported this on the Nokia PRO Forum, but I was requested to register and the registration form looks setup for paid users and not free ones.