H.264

• FOURCCs: AVC1, DAVC, H264, X264, VSSH
• Matroska CodecID: V_MPEG4/ISO/AVC
• Technical Description: http://akuvian.org/src/x264/ITU-T_H264.pdf.gz
• Draft Specs from 2003: http://www.dspr.com/www/technology/JVT-G050.pdf
• Specs : http://www.itu.int/rec/T-REC-H.264/en
• Samples:
  • AVC1: http://samples.mplayerhq.hu/V-codecs/AVC1/
  • H264: http://samples.mplayerhq.hu/V-codecs/h264/
  • VSSH: http://samples.mplayerhq.hu/V-codecs/VSSH/

MPEG-4 part 10 video, also known as AVC, or "Advanced Video Coding."

Here is a good picture comparing VC-1 and AVC.http://home.wanadoo.nl/mvp35/S3_P3_Jeffrey_slide_10.png