1.Mov stands for Apple QuickTime Movie file format. Mov is a kind of container and can store video and audio. It is developed by Apple Company and used for Macintosh and Windows both. To convert mov to avi, please install the QuickTime Player and QuickTime Directshow filter.

To convert mov to avi easily, please install the avi video or audio encoder such as DivX, XviD.

Run Open Video Converter, click the Open Video button, select a mov file for mov to avi.

2. 3GP is a video file format used for 3GPP on 3rd generation cell phones. It is a simpler format from Apply Quicktime *.MOV or MP4. 3GP files have the extension *.3gp or *.3g2. 3GP compresses video streams with H.263 or MPEG4, and audio streams with AMR (Adaptive Multi Rate) or AAC formats.

To convert 3gp to avi easily, please install 3GP codec such as FFDSHOW + Haali Media Splitter, or HDX4, or QuickTime Alternative. Avi encoders such as  DivX XviD are necessary also.