How to convert video to avi ?
The part will step by step show you how to convert MP4 to AVI, WMV to AVI, MPEG to AVI, MKV to AVI, MPG to AVI, DIVX to AVI, etc. with Video to AVI Converter
Step 1:Download Video to AVI Converter and install it.

Step 2:Click "Add" button to add the video you want to convert

Step 3:The supported input formats include: 3GP/3GPP, 3G2/3GP2, MJPEG, AVI, DivX, Xvid, MPG, MPEG(MPEG-1/2), DAT, FLV, MKV(Matroska), QuickTime(MOV,QT), MP4, M4V,TS, WMV, ASF, MPEG-4 AVC, DVR-MS, H.263, H.264, X.264
Step4:Click the “profile” to chose the output file as AVI
Step5:If you want to customize the output video, you can click the “Settings” button next to the format field to open the Settings window, and set the video resolution,FrameRate,or set the audio SampleRate. They can be adjusted or changed manually according your needs.

Step6:Set the folder where you want to save your target file
Step7:Wait for Video to AVI Converter to finish converting the video.
Video Edit Tips:
video trim:This function of trim operation is very useful because you can choose the most wonderful part that you like best to convert.
Effect:You can click"Effect" and customize the brightness, contrast, and saturation of your video. You can even apply special effects such as "Gray," "Negative," and "Old film."
video crop:You can cut off the black edges of the video model you prefer by clicking the"Crop" button and then setting the “Zoom"“Left”"Top"“Width”and “Height”.
Why not have a try, you will find more information at: Video to AVI Converter