Aero Quartet (http://aeroquartet.com) has released version 3.10 of SimpleMovieX, a Mac OS X movie editor. This new version lets you add movies to your iTunes library in one click, automatically picking the fastest method while preserving quality.

Movies with multiple audio tracks, like alternative languages or AC3 Dolby, can now be saved in MP4 formats natively. Chapters, languages, metadata and artworks that you add to your movies with SimpleMovieX, are compatible with AppleTV, iPhone, iPad, iPod and Front Row. The bonus in version 3.10 is an experimental feature that saves XVID movies into iTunes library 10x faster by “mutating” video into MPEG4 Video codec: You can now watch a feature-length movie on your iPad or iPhone just 5 minutes after opening it with SimpleMovieX.

With a feature set roughly similar to QuickTime Pro, SimpleMovieX extends editing capabilities to other popular video formats such as AVI, Google Video, MPEG-1, MPEG-2 and MPEG-4.

For occasional users, an unlimited demo version of SimpleMovieX is available for free download. Registration is US$29.90, though version 3.10 is a free update for registered users of version 3.x.

SimpleMovieX requires Mac OS X 10.4 or higher. It’s Universal Binary so runs natively on both PowerPC and Intel Macs. The QuickTime MPEG-2 Playback Component is required to take advantage of MPEG-2 capabilities. However, QuickTime Pro isn’t required.