Audio Video Interleave, known as AVI, is a multimedia container format created by Microsoft in 1992. AVI files contain both audio and video data and support synchronous audio-with-video playback. An AVI container can support virtually any compression scheme including Full Frame (uncompressed), Intel Real Time (Indeo), Cinepak, Motion JPEG, Real Video, MPEG-4 and others.
Windows Media Video, or WMV, is Microsoft’s family of video codecs including WMV 7, WMV 8, and WMV 9. It can handle anything from low resolution video for dial-up Internet users to HDTV. The latest generation of WMV, based on the WMV 9 codec, has been standardized and approved as a new and more open codec known as VC-1. While all versions of WMV support variable bit rate, average bit rate, and constant bit rate, WMV 9 introduced several important features including native support for interlaced video, non-square pixels, and frame interpolation.
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