Convert any video file to MP3 format online for free. Fast, secure, and easy-to-use video to MP3 converter with no software installation required.
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Max file size: 50 MBMax duration: 30 min
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Drag and drop your VOB file, or click to browse for it.
Choose MP3 as the output and click Convert. The conversion runs on our servers, so your device does none of the work.
Download your converted file instantly. The download link expires in 1 hour for security.
Our powerful servers process your files quickly, delivering converted files in seconds.
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Your file is used only to make your conversion. It is never published or shared, and the download link expires after one hour.
Works directly in your web browser. No software download or installation required.
How the two formats differ on the things that change your result.
| Specification | VOB (source) | MP3 (result) |
|---|---|---|
| Container | DVD-Video (MPEG-2 PS) | MPEG-1/2 Audio Layer III |
| Developed by | DVD Forum | Fraunhofer IIS / MPEG |
| Introduced | 1996 | 1993 |
| Audio codecs | AC-3, DTS, LPCM, MP2 | MP3 |
| Compression | Depends on codec | Lossy |
| Approx. file size | 30–68 MB per minute | 0.96–2.4 MB per minute |
| Metadata / tags | Container tags | ID3v2 |
| Licensing | Patents expired | Patents expired |
| Plays natively on | Needs a player: macOS, Android, Windows | Native: Web browsers, Windows, macOS, iOS, Android, Smart TVs |
| Best for | DVD archives, home theatre, legacy archives | music libraries, podcasts, sharing with anyone |
This extracts the audio and discards the video entirely. The soundtrack inside a VOB file is typically AC-3, and it is re-encoded to MP3 on the way out.
Expect a much smaller file. Video accounts for most of the bytes, so about 49 MB per minute becomes roughly 1.7 MB per minute of MP3.
Subtitles do not survive audio extraction, since an audio container has nowhere to store them.
When a video holds several audio tracks, the main one is extracted; alternate language tracks are not merged into the result.
Extracting MP3 audio from a VOB video pulls the soundtrack out of the DVD-Video (MPEG-2 PS) container and writes it as a standalone MPEG-1/2 Audio Layer III file. The video stream, which holds most of the data, is discarded.
Developed by DVD Forum in 1996, VOB carries MPEG-2 video and AC-3, DTS, LPCM, or MP2 audio. That combination sets the upper bound on what any conversion can preserve.
MP3 was introduced by Fraunhofer IIS / MPEG in 1993. It holds lossy-compressed audio (MP3) and plays natively on web browsers, Windows, macOS, iOS, Android, and smart TVs.
After converting your file, you can use Scriptivox transcription services to convert your audio to text. Perfect for meetings, interviews, podcasts, and more.
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