No, a VOB file is not the same as an MP4 file. A VOB (Video Object) file is a container format that stores video, audio, and subtitle streams on DVDs. It typically contains video encoded with the MPEG-2 codec, navigation, and menu information.
On the other hand, MP4 (MPEG-4 Part 14) is a digital multimedia container format used to store video, audio, and other data, such as subtitles and images. MP4 files commonly use the H.264 codec for video compression. While both formats hold multimedia content, they are distinct in structure, compression methods, and compatibility with different devices and software.