Microsoft MPEG-4

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The Microsoft MPEG-4 codecs are similar to the ISO MPEG-4 coding standard but with various modifications to specifics such as Huffman tables and prediction methods. These are the different codecs covered under the umbrella of Microsoft's version of MPEG-4:

  • Microsoft MPEG-4 version 1
  • Microsoft MPEG-4 version 2
  • Microsoft MPEG-4 version 3
  • Microsoft Windows Media Video v1/v7 (WMV7)
  • Microsoft Windows Media Video v2/v8 (WMV2/WMV8)

The full line of Microsoft MPEG-4 codecs is supported by FFmpeg with one current caveat: WMV8 support is missing one coding mode sometimes referred to as J-type frames, an alternate type of I-frames in the coding scheme.