Convert MSWMM to WMV

A player or device that accepts video files but not Movie Maker projects cannot open an .mswmm file. Exporting the project as WMV creates a video for sharing or playback in software that supports Windows Media formats.

What the MSWMM format is

.mswmm is a project format used by classic Windows Movie Maker. It stores editing instructions, such as clip order, titles, and transitions, plus references to the source media; it does not contain the finished video or the referenced footage. The source files must remain available for the project to render correctly.

What the WMV format is

WMV (Windows Media Video) is a compressed video format associated with Microsoft’s Windows Media platform. It can produce smaller files than uncompressed video and works with Windows Media-compatible software, especially older Windows systems. Support varies on modern devices, and WMV is not as universally supported as MP4.

How to export the project as WMV

1. Open the .mswmm file in a classic version of Windows Movie Maker that supports it. If prompted about missing media, restore the referenced video, audio, or image files to their original locations or relink them.
2. Preview the project to check that its clips, titles, transitions, and audio are present.
3. Select File → Save Movie File, choose My computer, and follow the prompts to set a filename and destination.
4. Choose an available movie setting that suits the required quality and file size, then complete the export. Play the resulting .wmv file to verify it.

Windows Movie Maker is discontinued, but a compatible classic version is the appropriate listed tool for rendering an MSWMM project. Windows Live Movie Maker uses the .wlmp project format and is not a reliable direct opener for MSWMM files. Online converters generally cannot render an MSWMM project: they cannot access its referenced local media or interpret its editing instructions. If the compatible Movie Maker version or source media is unavailable, the project may need to be rebuilt from the original media in another editor.

Quality and compatibility

The export preset’s resolution and bitrate affect image detail and file size; a lower-bitrate setting reduces size but can add visible compression. Missing source files can cause clips to be absent or prevent export. Changing the .mswmm extension or uploading the project to a standard video converter does not turn it into a playable video.