A .mswmm file is the movie created with Windows Movie Maker. It's a project file instead of a video file and it contains the location of the actual media files that are used by Windows Movie Maker. Windows Movie Maker allows users to edit the content saved in the MSWMM file. Once you've finished making the movie, you can export the project as a video file. The MSWMM file can only be opened and viewed in Windows Movie Maker. If you want to watch them elsewhere, you need to first export MSWMM as a video, usually in WMV format. After that, you can play Windows Movie Maker MSWMM on your computer without any troubles.
To convert MSWMM to video formats like WMV, MP4, AVI, MOV, 3GP, MKV, FLV, VOB and more, you need first save it as a video. Double click the MSWMM file and open it in Windows Movie Maker and click File > Save Movie File to save it to your computer. Or click Tasks > Finish Movie > Save to my computer to save the MSWMM project to a video. Currently, Windows Movie Maker lets you convert MSWMM to WMV and AVI.
Since Windows Movie Maker can only save your MSWMM files to WMV and AVI, if you want to convert MSWMM to MP4, save MSWMM as MOV or other popular formats like 3GP, FLV, VOB, MKV, etc., you'll need to use a video converter to convert Windows Movie Maker exported WMV/AVI videos to the format you want. Aimersoft Video Converter Ultimate here is recommended as a perfect MSWMM converter that can convert MSWMM to almost any regular video format. Just download it and follow the tips below you save your MSWMM files in any format.
The main interface of the program is as below and you can finish converting your videos in the following 3 steps:
1> Follow the tips above to save MSWMM to WMV or AVI. Then launch the MSWMM converter and click Add Files to import the saved WMV/AVI video files.
2> Click Output Format to chooose a proper output video format. There is an array of video presets for portable devices like iPhone, iPad, iPod, Apple TV, Android, HTC, Samsung, PSP, Xbox 360, Zune and more are provided to let you convert MSWMM to fit your portable media players.
3> Click the big Convert button to start conversion. When the conversion completes, click Open Folder to locate the converted video files. After that, you can share and play the movies anywhere you like. Just enjoy the videos!