Unsupported encoding settings in Windows Media Player typically means the file needs a codec that is not installed, or the current codec configuration is not supported.
Try this first in Windows Media Player 11:
- Open Tools > Options.
- Select the Player tab.
- Turn on Download codecs automatically.
- Select OK.
- Play the file again.
- If prompted to install a codec, select Install.
If audio plays but video does not, or a codec error appears, that matches the documented codec-missing scenario.
For deeper checking:
- In Now Playing, right-click the file and select Properties.
- Open the File tab.
- Note the values shown for Audio codec and Video codec.
- Go to Help > About Windows Media Player.
- Select Technical Support Information.
- Check whether the codec noted in the file properties is listed in the installed codec information.
- If the codec is missing, reinstall or install that codec, then test playback again.
If no audio codec or video codec is listed for the file, that also indicates a codec issue.
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