Audio Mixer Video Editor (VIDMIX) is a simple yet effective video mixer that lets you mix videos from different sources, edit your creations, convert them to audio, and save them to mp3 format.

The app can mix several video formats, including mp4, flv, wmv, f4v, etc. 

You can mix videos and audio from the same source file. It can cut, trim, split, merge, and join videos in one click.

You can apply effects, such as transition and add text to your video.

The app offers a preview window that lets you see how the videos will look and sound after you finish mixing. You can zoom in and out of the image to see it more clearly.

The app will automatically trim audio files to the appropriate length and will give you an option to save it to mp3 format.