I am working on a joint project.  My assignment is to create my own portion of a slideshow with music using WMM 2012 and save as a mp4 movie.  The movies will be projected on a large screen.  We were told to use the 1440 x 1080 resolution.  I have created the movie as a project file without any issues, but when I go to save the movie in the recommended settings I get a message that says I do not have enough memory.  I am using a desktop computer.  I am sure other people are able to save movies without this problem, or it would not be offered as an option.  I can save a movie as long as it has no more than 4 slides and is not more than 15s. 

If I choose the "for a computer" option or custom settings with the same ratio but lower pixels, will my movie still be the quality I need to project on a large screen?

I thought I might be able to make several smaller movies and then combine them, but later this year I have to make about a 15 minute video.  The idea of trying to clip the music and slides and paste them all together in one movie is daunting if I can only do 15s at a time.

I never had this problem with wmm 2011 when saving as a wmv.  I have tried saving this file as a wmv and get the same problem.