VideoInspector is a tool designed to provide you with as much information as possible about your video files. With VideoInspector you'll know why your video files has no sound or refuses to play correctly. VideoInspector will help you installing the required CoDecs (coder/decoder software) for an optimal performance.
Have you ever opened up a video file only to get an error that it cannot be played. Or maybe you can at least hear the audio but see a blank screen. Well, in all probability you have the required codecs missing.