ASF (Advanced Systems Format), a Microsoft streaming format associated with Windows Media Player. The format does not specify how (i.e. with which codec) the video or audio should be encoded; it just specifies the structure of the video/audio stream. This is similar to the function performed by the QuickTime, AVI, or Ogg container formats. For Mac users, you can open .asf file in VLC media player for Mac version.
However, if you want to play .asf on iRiver with its default player, you may feel depressed, as the .asf movie file can’t even be recognized by iRiver. In the case, you need to convert ASF to iRiver-compatible file format like AVI on Mac (Lion, Mountain Lion and Snow Leopard).
How to convert ASF to iRiver on Mac OSX:
To convert .asf for iRiver enjoyment, you have to render to a powerful iOrgSoft ASF to iRiver Video Converter for Mac, which is able to convert almost any video file format to iRiver playback, surely including ASF to iRiver conversion. All the conversion can be done with several mouse clicks in several minutes.
Launch the iRiver Video Converter for Mac. Click "Add File" button to add .asf file(s) you want to convert.
Step 2: Choose "iRiver Video" as output file format
Click drop-down button next to "Profile" on the main interface to find the "iRiver Video" file format as output.
Note: The application has well compatibility with the iRiver family members such as iriver X20, iriver B20, iriver Clix, iriver PMP, SIREN, iriver S100, iriver P7, iriver T-series, iriver E-series, iriver PMP series, etc.
Step 3: Convert ASF to iRiver on Mac
You’re almost done. Hit "Convert" button to launch the conversion. The conversion is fast, depending on the file size. The smaller the file size is, the faster the conversion will be!