Useful guides and tutorials related to codecs and multimedia.

What's the difference between decoding, encoding, recoding and transcoding?
See the exact difference between these terms.

How to (re)install Default Codecs in Windows XP/2000
Install Microsoft ADPCM Audio Codec, IMA ADPCM Audio Codec and all default codecs.

Codecs Supported by Windows Media Player for Windows XP
A list of codecs that are supported in Windows Media Player for Windows XP.

Adding and Removing Default Codecs (and MCI) in Windows 95/98/Me
Removing and reinstalling a codec may solve problems playing a particular file type.

Four-Character Codes (FOURCC)
A set of codes that are four characters in length, introduced to clearly identify video data stream formats. They also describe the format of the data itself.