merge-vob-files-to-mp4

Joyoshare Video Joiner is a professional video merging tool. Except for joining videos and audios, you can also use it to cut and edit videos. Also, it supports to convert different formats to popular ones. You still can use it to extract audios from videos, like MP3 from MP4.
Official website: https://www.joyoshare.com/video-joiner/