Follow the steps below to convert AVI files to MP4 using Toolsoft Video Converter.

1. After launch Toolsoft Video Converter, In the folders pane, click on the folder contains AVI files you want to convert to MP4.
2. In the file list pane, select one or more AVI files.
3. Right click on the selected AVI files to bring up the context menu and select Convert.
4. In the "Convert Video" window, select MP4 from the "Output->Format" list.
5. If you want to change the output quality, select the video/audio combobox. You can change resolution, aspect ratio, frame rates, sampling rates, bits per sample, stereo/ mono channels, bitrate of MP4. (optional)
6. If you want to change the destination folder for MP4, click on the "Browse" icon button to change. (optional)
7. Click Convert to start converting.

[ View screenshots of steps for AVI to MP4 conversion ]