Users looking for dav to avi conversion are typically searching for a way to export .dav recordings Bahama Security solutions to AVI format, so they can playback it using a standard media player. For this you have to use specialized utilities like Dahua AVI Convert or Mac DAV Converter, because standard video converters usually do not work - although many advertise it.
Open DAV file Open AVI fileA simple converter for .dav videos
A DAV converter for Mac