Audio Video Mixer App provides a facility for changing Background Music of any video files.Audio video mixer is one type of video editor app, using this app you can add or mix your favorite audio files to video files. This app manage audio file size if the audio file length is larger than video files, it will be automatically trim audio to video's duration. Some Feature of Add Audio to Video :- - Select video from your gallery. - You can add audio file to your video and also Mute your video