A useful tool for mixing video and audio. You can easily add audio to video files and convert to most popular formats. If you intend on using it frequently, you can purchase a licence for $39.95.
Full Video Audio Mixer is a tool designed to easily mix video and audio files. You can also use this program's tools to extract audio from a video to place in a different video file. This software supports import formats such as MKV, MOV, VOB; you can choose whichever export format best suits you.