Windows Movie Maker Audio Problems: Unsupported Formats and Re-Encoding
Windows Movie Maker supports all formats of Windows Media: WMV and WMA. It also supports AVI files. The best supported audio format for Windows Movie Maker is the WAV format.
If you receive an error message for a video clip you import into Windows Movie Maker, try playing it on any Media Player. If it plays fine, chances are the software is not able to split the clip properly into video and audio. In such a case, it is recommended that you re-encode the media file into a different format using Windows Media Encoder (Fig 1).
The best bet is to use Adobe Premiere. You can import the media creating problems into Premiere and get output as WMV or AVI. In the first screen that appears after you install Adobe Premiere, select A/B editing (Fig 2) as it is easy. You can see all tracks in the media and export only the ones you need. Better still, when you understand the software, you can create great videos. Still, Windows Media Player is faster than Premier when it comes to rendering the output.
If the problem appears only for an audio file instead of video clip, the best thing is to go for Sonic Foundry’s Sound Forge (Fig 3). From the "Entertainment" menu in "Accessories" under "All Programs" of "Start" menu, select "Volume Control." In the "Options" menu of "Volume Control", select "Options," "Properties," and then "Recording." In the "Recording" dialog, click "SW Synth" (Fig 3). With Sound Forge ready, click on its "Record" button while playing the audio file simultaneously on any audio player. All the audio gets recorded until you click on "Stop Recording." You can save this audio file in WAV file to solve the audio error problem in Windows Movie Maker.
Though the last option seems difficult, it is a breeze. Being a free software and its capability to convert any sound into WAV format, Sound Forge 4.5 (free version) is a must have if you regularly deal with multimedia.