Batch convert a lot of *.mp4 from F3

[PDR]

I think Adobe has worked out the licensing issues in 5.5

I think you're right

The trial version of Adobe Media Encoder CS5 doesn't include some features that depend on third-party software components that are only included in the full version of Adobe Media Encoder. The import and export of some formats are not supported in the trial version. The trial version for Adobe Media Encoder CS5.5 does not have these limitations, it is as functional as the retail version.

http://help.adobe.com/en_US/mediaencoder/cs/using/WS725e431141e7ba651e63e3d1267818bc51-8000.html