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What is ASF file?

The ASF file type is primarily associated with 'Advanced Streaming Format' by Microsoft Corporation. Advanced Streaming Format is an open file format specification for streaming multimedia files containing text, graphics, sound, video, and animation. Advanced Streaming Format (ASF) does not define the format for any media streams within the file. It defines a standardized, extensible file container that is not dependent on a particular operating system or communication protocol, or on a particular method (such as HTML or MPEG 4) used to compose the data stream in the file.

An ASF file consists of three objects: a Header object containing information about the file itself, a Data object containing the media streams, and an optional Index object that can help support random access to data within the file. A number of programs capture this file extension.

How to convert ASF to iMovie on Mac (10.8 Mountain Lion included)?

To convert ASF to iMovie quickly and easily, a solid and intuitive video converter is a great help. Here, I directly recommend this Video Converter for Mac. It offers excellent configured presets for Apple sofware and Apple devices. Belows comes the detailed guide.

Step 1: Free download ASF to iMovie Converter for Mac (Mountain Lion supported)

Step 2: Import ASF files

Drag and drop your ASF files to ASF to iMovie Converter for Mac and set the output format from the bottom output panel. Choose iMovie from the Editing category as the output format.

Step 3: Start ASF to iMovie conversion

Just click the Convert button at the bottom right corner of the program window to start converting asf to imovie.

After the process of converting ASF to iMovie compatible formats on Mac running Mac OS X Snow Leopard, Lion, Mountain Lion etc, you can import your ASF to iMovie successfully. By the way, more tips about how to edit ASF videos on iMovie are here.