MPEG

The .mpeg file extension is used for a digital video file format that was developed by Moving Pictures Experts Group. Based on MPEG-1 video format, these MPEG files are normally used for storing digital movies and animated clips in VCD (video CD) quality. The content of an MPEG file is digital video that has been encoded in MPEG-1 format. This video data is normally at 30 fps (frames per second) and in a resolution of 352x240.

- - File.org

AVI

Audio Video Interleave (also Audio Video Interleaved), known by its initials AVI, is a multimedia container format introduced by Microsoft in November 1992 as part of its Video for Windows software. AVI files can contain both audio and video data in a file container that allows synchronous audio-with-video playback. Like the DVD video format, AVI files support multiple streaming audio and video, although these features are seldom used.

- - Wikimedia

Step-By-Step to Convert MPEG to AVI

Interface

Step 1. Download and install the program, then double click it to run it, and then you'll see the main interface of the program.

Load Files

Step 2. Click "Add File(s)" button. Here you can select "Add Video" or "Add Folder" button to add files as you like.

Profile

Step 3. Click the drop-down arrow right beside the "Profile" column and select your desired video format from the drop-down list.

Edit

Step 4. Click "Edit" button to customize the output video like Effect, Trim, Crop, 3D Settings and Watermark.

More Reading