Users who like to mix audio and video should have this program: Audio to Video Mixer, which is interesting entertainment.
Audio to Video Mixer lets you eliminate the original sound of any video and from this moment you can add your own sound to that video. In other words, add sound effects as you like, music, audio or a narration (previously recorded via the microphone), letting you do all types of mix, and synchronize them as you like.
You can work with the following audio formats: WAV, MP3, WMA, AC3, OGG, MPA, MP2, AU, AIF, SND, etc... and the following video formats: MPEG, VCD, AVI, WMV, ASF, OGM, DIVX, DAT, etc.
To work correctly the program needs you to previously install
DirectX 9.0.