What is a VOB File? (And How to Convert VOB to MP4)

If you have ever inserted an old family DVD into a computer drive and tried to copy the video files to your hard drive, you probably got extremely confused.

You open the disc folder, expecting to find a single, clean video file. Instead, you find two folders named AUDIO_TS and VIDEO_TS. You open the video folder and find a random assortment of .bup, .ifo, and .vob files. The VOB files are usually massive, split into 1GB chunks like VTS_01_1.VOB and VTS_01_2.VOB.

What are you supposed to do with this mess?

The DVD era: What is a VOB file?

VOB stands for Video Object. It is the container format that physical DVDs use to store actual video, audio, and subtitle streams. It was specifically engineered for optical drives in 1995, not for clicking and playing on a modern smartphone.

The reason your old wedding video is split into multiple 1GB VOB files is due to an ancient file system limitation. Early DVD file systems physically could not handle files larger than 1 Gigabyte. The DVD player knows how to stitch them together seamlessly when you press “Play”, but your computer sees them as completely broken, separate fragments.

Most modern video players, phones, and smart TVs have absolutely no idea what to do with a standalone VOB file. You probably want to upload that old recital to YouTube or text it to a family member. To do that, you have to convert the VOB to MP4.

How to extract video from a VOB file

If you only have one large VOB file, the process is simple.

There are many online tools that will convert a VOB to an MP4, but you will quickly run into file size limits. A single VOB file is exactly 1,024 Megabytes. Most free cloud converters cut you off at 100MB or 500MB, forcing you to pay a monthly premium just to convert your own videos.

Even worse, uploading a gigabyte of footage to a server is incredibly slow. Your internet connection will choke for an hour before the video even starts processing.

The fast, zero-upload method

We built the GetAnyFile Video Converter to handle massive files locally. We use a technology called WebAssembly that forces your actual web browser to act like a video transcoder.

Because of this, nothing uploads to our servers. It all runs on your hardware, which means your file size limit is virtually infinite.

Here is exactly how to salvage that VOB footage:

1. Open the VOB to MP4 Converter in your browser.
2. Drag and drop your .vob file onto the page. You can drag multiple 1GB increments at the same time.
3. Keep the target format set to MP4.
4. Click Convert.
5. Once your computer finishes processing, click the download button.

You are now left with a standardized MP4 video file.

The MP4 will be dramatically smaller than the original gigabyte chunk, meaning it will easily fit on a flash drive, upload to YouTube, or play natively on practically any device invented in the last fifteen years.

Do not let those old memories die on scratched plastic discs. Get them converted into modern MP4s before you cannot buy a DVD drive anymore.