Make sure you have Published/Finished your Windows Movie Maker project file first. Once you have done that, download and install an audio converter on your computer. Use the converter to convert the .wma audio file (produced by Windows Movie Maker) into a .mp3.
To change a Windows Movie Maker file into a .wmv, all you need to do is Publish/Finish the project in the program.Click on the Windows Movie Maker How-To link posted in the Related links section below for instructions on how to Publish/Finish your project.
A Windows Movie Maker project file is in .MSWMMformat.
A Windows Movie Maker project file is in .MSWMMformat.
You can't index a file for Windows Movie Maker.
Open the file in in windows movie maker then click on publish movie, click on computer then wait 4 about 5 mins in makes it into a wmv file.
The only way to change a Microsoft Windows Movie Maker (.MSWMM) file into another format is by Publishing or Finishing the project.
You don't need to change the file format of an .mp3 to use in Windows Movie Maker since the program accepts the format. These are the Audio formats Windows Movie Maker can import:.aif, .aifc, .aiff, .asf, .au, .mp2, .mp3, .mpa, .snd, .wav, and .wma
You can't do that on Windows Live Movie Maker, but you can extract the audio from a video in Windows Movie Maker v2.6 and save/publish it as an audio file.
A Windows Movie Maker project file (MSWMM) can only be edited/viewed in the Windows Movie Maker program.A Windows Movie Maker movie/video file is the Finished/Published version of the project file which has been converted to a finished Standard Format for viewing.
You can't change WMM (Windows Movie Maker) files into other formats. The way files are converted to other formats is through the Publishing/Finishing process.Publishing/Finishing the movie in Windows Movie Maker "mixes-down" audio and video properties resulting in conversion from WMM project format to a finished format.Depending on the Windows Movie Maker version you are using, you must either Publish or Finish/Save the movie project in order to change the file format.
Most likely because that file type is not supported in Windows Movie Maker
You can't play unsupported file extensions in Windows Movie Maker. You have to convert the file to a format compatible with the program.