Step 1. Free download the trial version of mediAvatar Video to DVD Converter, install and run it. The interface is shown as the following:

 

Step 2. Click "File -> Add Video files or Add Video Folder" to import your AVI files.

The selected AVI files will be displayed in this AVI to ISO Converter:

Step 3. Click "Destination" drop-down list to select a DVD form. Here we choose "Save as Image(.iso)...". Then change "DVD Name".

Step 4. You can edit menu by clicking "Edit" button on the right panel of this AVI to ISO Converter.

 

Step 5. Click "Star Burn" button to start to convert AVI to ISO by this AVI to ISO Converter.