Launch Oxelon Media Converter. Open the "Media Format" pull-down menu and select "MP4 (.mp4)."

Click the "Add Files" button and search for the OGM input file in the file selection window. Select the item and click the "Open" button to import the video into the application.

Click the "Conversion" button to encode the video. A confirmation message will display when the file conversion is successful. Click the "Browse" button to retrieve the MP4 output file from its default storage location.

Launch iWisoft Free Video Converter. Click the "Add" icon and search for the OGM input file in the file selection window. Select the item and click the "Open" button to import the video into the application.

Open the "Profile" pull-down menu. Go to "Common Video" and select "MP4 Movie (*.mp4)."

Click the "Start" button to encode the video. A confirmation message will display when the file conversion is been successful. Click the "Find Target" button to retrieve the MP4 output file from its default storage location.

Launch an Internet browser and go to the Online Convert website.

Open the "Select target format" pull-down menu in the "Video Converter" section. Select "Convert to MP4" and a file conversion page will load.

Click the "Browse" button and search for the OGM input file in the file selection window. Select the item and click the "Open" button to submit the video for conversion.

Click the "Convert file" button to encode the video. A download page will load when the file conversion is successful. Click on the "direct download" link and follow the on-screen instructions to obtain the MP4 output file.