AVI is short for Audio Video Interleave and it is the standard format of a video file for Microsoft's “Video for Windows”. Microsoft released the AVI file format in November of 1992 as a part of the package.

WMV stands for Windows Media Video, which is the general name for group of related technologies; the entire WMV family deals with video and audio in some way.

1: AVI's greatest advantage over WMV is that it is more compatible across different platforms.
2: WMV's advantage is that it compresses the video more than AVI, so a video in WMV will take up less hard drive space than that same video in AVI.
3:.Both AVI and WMV are audio and video containers, meaning that they are used to play video on Windows systems.

Other Comparison: MOV vs WMV / 3GP vs 3G2 / MP4 vs FLV / MKV vs MP4 / MP4 vs MP3 / 3GP vs MOV / 3GP vs FLV / M2TS vs MP4

Related Post of AVI File formats

Related Post of WMV File formats