MPG is an excellent compression extension that helps compress audio and video files without losing quality. It offers MPEG-1 and MPEG-2 files that are small yet high-quality. You'll rely on these files to serve as a container for audio and video files, ensuring that both remain in sync. In addition, you can run this extension on your Mac, Windows, and mobile devices. MPG can compress files up to 1.5mbit/s. While digital files are compressed to a 26:1 ratio, audio files get to 6:1. Various programs can open MPG files, including Windows Media Player, Windows Movie Maker, VLC, Apple iTunes, Adobe Flash, and Roxio. Cyberlink video editing software and Xilisoft are also among the programs that can open MPG files.