The video is copied, not re-encoded
In our test the MP4 held mpeg2video at 720 × 480 and 29.97 fps, the same as the VOB. Frame 60 of the source and of the MP4 had identical pixels, so a plain conversion adds no new compression loss.
VOB to MP4 Converter
You get an MP4 that holds the same MPEG-2 picture and AC-3 sound as your VOB, with the first audio track and no menu data.
To convert vob to mp4, add one VOB file, keep MP4 as the output and download the result. In our test the video was copied into the MP4 without re-encoding, so the picture was identical, but it is still MPEG-2 and Chrome could not play it. Only the first audio track was kept, menus are dropped, and an uppercase .VOB name was refused until we renamed it.
Transfers use HTTPS, and files converted on the free tier are deleted after 24 hours, so the result is not a long-term archive. Quality depends on the source file, so open the MP4 file once before you share it.
FromVOBLossy
VOB (DVD Video Object)
A VOB is the file DVD-Video discs use for the movie, built on the MPEG-2 Program Stream. It usually holds MPEG-2 video and AC-3 audio, and it can also carry subtitle and menu data. A long title is split into numbered files in the VIDEO_TS folder, and only the first one starts with a full header.
ToMP4Lossy
MP4 (MPEG-4 Part 14)
The container that phones, browsers, cameras and editing apps are built around. An MP4 can hold many codecs. The one you get from this page depends on what the VOB contained, so check the codec before you assume it will play on a TV or phone.
A 5-second DVD-style VOB test clip (720 × 480, two AC-3 tracks) made by us, converted on indox.org
- VOBthe original, MPEG-2 video with two AC-3 audio tracks, 5.01 s
- 4.15 MB
- MP4from indox, 4.7% smaller; MPEG-2 video copied, first AC-3 track only
- 3.95 MB
- VOB, part 2a headerless continuation piece, 2.74 s
- 2.10 MB
- MP4, part 2converted on its own; the video was about 0.5 s shorter than the source
- 1.62 MB
Why use indox to convert VOB to MP4?
The interlace flag stays
The DVD sample was interlaced, with the top field first. The MP4 kept that flag. The converter did not deinterlace the picture, so motion on a modern screen can show combing unless your player deinterlaces.
Index at the front of the file
The MP4 was written with its index before the video data, so a player that supports the codecs can start before the whole file has downloaded.
One AC-3 audio track at 192 kb/s
The sample had two AC-3 stereo tracks. The MP4 had one, the first, at 192 kb/s. If your disc carries a commentary or a second language, it is not in the output.
What happens to your video
Stays
- The picture: our test frame was identical before and after
- The size, 720 × 480, and the 29.97 frames per second
- The interlace flag
- The first audio track, as AC-3 at 192 kb/s
- Your original VOB, which is not touched
Changes
- The container: DVD Program Stream becomes MP4
- Further audio tracks are dropped
- Menu and navigation data is dropped
- The index moves to the front of the file
When to use something else
| You need | Use | Why |
|---|---|---|
| H.264 video for a phone or TV | A desktop re-encoder such as HandBrake | This page copies MPEG-2 and does not re-encode |
| The whole disc as one file | Join the VOB files first on your computer | This page converts one file per run |
| A chosen audio or subtitle track | A desktop tool with track selection | This page keeps the first audio track only |
| A quick MP4 wrapper for one VOB | This converter | It copies the stream in seconds and needs no install |
How do I convert VOB to MP4 online?
- 1
Add one VOB file
Drop a VOB on the box or choose it from your device. The file name needs a lowercase .vob extension. In our test VTS_01_1.VOB in capitals was refused on the page, and the same bytes named .vob uploaded fine.
- 2
Keep MP4 and start the conversion
Check that MP4 is the output format, then start. In our test a 5-second, 4.15 MB VOB took 4.8 seconds from the click to Completed. A longer or larger file takes longer.
- 3
Download the MP4 and check it in a player
Save the file and open it in a player that handles MPEG-2, such as VLC. Check the sound and the audio language, because only the first track is kept.
What do I get from indox's VOB to MP4 converter?
You add a VOB from a DVD rip or a camcorder disc and get an MP4 without installing anything. The page says what ends up inside the file and where it falls short.
- A stream copy that leaves the picture unchanged
- Nothing to install on Windows, Mac or a phone
- Numbers from a run we measured ourselves
- A plain list of what is dropped and what failed
What are the limits for VOB to MP4?
Size
The upload box shows the live size limit before you add a file. Signing in raises it; a paid plan does not change it.
Formats
VOB in, MP4 out. Pick another output on the converter if you need a different format.
Privacy
Files are encrypted in transit over HTTPS and processed on indox infrastructure.
Deletion
Free-tier files are kept for 24 hours after the job finishes, then deleted automatically.
Limits worth knowing
- The output is not H.264. It keeps MPEG-2 video and AC-3 audio, so a browser, phone or smart TV may refuse it even though the container is MP4. In our test Chromium 156 would not play it.
- One upload converts one VOB. The tool does not join the numbered files of a disc. In our test a headerless second part converted on its own, but its video came out about 0.5 seconds shorter than the source, so separate parts do not make a seamless movie.
- Only the first audio track is kept, and menus and chapters are dropped. Subtitles were not tested.
- Discs protected against copying are not what this page is for. We did not test one, and an encrypted VOB should be expected to fail or give unusable video.
When the result is not what you expected
| What you see | Why | What to do |
|---|---|---|
| Nothing in that drop can be converted | The file name ends in capital .VOB, which the page refused in our test | Rename the extension to lowercase .vob and add it again |
| The MP4 does not play in the browser | The video is MPEG-2 and the audio AC-3, which Chromium 156 could not play | Open it in VLC, or re-encode to H.264 with a desktop tool |
| Only the first part of the film appears | Each numbered VOB is its own file and only the first has the full header | Convert each part and join them on your computer |
| The second language or commentary is missing | Only the first audio track is kept | Use a desktop tool that lets you pick the audio track |
| The conversion fails on a commercial DVD | Copy-protected discs are not supported and were not tested | Use a disc you made yourself, such as a camcorder DVD |
What do the free and paid plans add?
Free
- All converters
- Daily credit refresh
- Email support
Basic
- Access to all features
- AI Extract
- Priority conversions
- Email support
Highest priority
Premium
- Everything in Basic
- Highest priority queue
- Priority support
Pay-As-You-Go
- No subscription
- Credits never expire
- Opt-in auto-refill
- Access to all features
Which conversions are close to VOB to MP4?
VOB vs MP4: what is the difference?
| Compared on | VOB | MP4 |
|---|---|---|
| Container | A restricted form of the MPEG-2 Program Stream, used on DVD-Video | ISO base media file format, derived from QuickTime |
| Typical contents | MPEG-2 video with AC-3 or other DVD audio, plus subtitle and menu data | Many codecs; our output held MPEG-2 video and AC-3 audio |
| One title | Split into numbered files in VIDEO_TS | One file per conversion on this page |
| Where it plays | DVD players and desktop players such as VLC | Most devices as a container; codec support decides playback |
| Standard | MPEG-2 Systems, ISO/IEC 13818-1 | ISO/IEC 14496-14, published in 2003 |
Who can use a VOB to MP4 converter?
When to use it
- Turning one VOB from a home DVD into an MP4 you can store in a normal folder.
- Checking what a VOB contains without installing a tool, by looking at the MP4 in a player.
- Getting a single title part into an editor that rejects the VOB container.
- Making an archive copy that keeps the original MPEG-2 picture untouched.
Where can I read more about converting files?
Sources
- VOB (DVD-Video Object) format record, fmt/425The National Archives (UK)
- MPEG-2 Program Stream format descriptionLibrary of Congress
- MPEG-4 File Format, Version 1 (ISO/IEC 14496-14:2003)Library of Congress
Facts checked on November 5, 2026
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VOB to MP4 FAQs
How do I convert VOB to MP4 for free online?
Add one VOB file to the converter in your browser, keep MP4 as the output and download the result. In our test, four anonymous conversions worked without an account, a limit message or a paywall.
Can I convert VOB to MP4 without losing quality?
In our test yes, because the video stream was copied and frame 60 had identical pixels before and after. The cost is that the MP4 stays MPEG-2, so you do not get the smaller files H.264 usually gives.
Why does my MP4 not play in the browser?
The video inside is still MPEG-2 with AC-3 audio. In our test Chromium 156 reported DEMUXER_ERROR_NO_SUPPORTED_STREAMS. A desktop player such as VLC handles these codecs. If you need H.264 for phones or TVs, re-encode it with a desktop tool.
How do I convert VOB to MP4 with VLC or HandBrake?
Both open VOB files on your own computer, and both can re-encode to H.264, which this page does not do. This page is the shorter route when you only want a quick stream copy of one file and do not want to install software.
Why does only the first part of my DVD play?
A DVD title is cut into numbered VOB files such as VTS_01_1.VOB and VTS_01_2.VOB, and only the first carries the full header. The tool converts one file per run, so each part becomes its own MP4. In our test the second part lost about 0.5 seconds of video.
Why is my uppercase VTS_01_1.VOB refused?
In our test the page answered "Nothing in that drop can be converted." for the capitalised name, while identical bytes named .vob were accepted. Rename the extension to lowercase and add the file again.
Are the second audio track, subtitles and menus kept?
The first audio track is kept. In our test a VOB with two audio tracks produced an MP4 with one. Menus and chapters are not kept. Subtitles were not tested.
Does this work on a Mac, Windows or Android phone?
Yes. The conversion runs on indox servers, so you only need a browser. Playing the result is a separate matter, because MPEG-2 and AC-3 support depends on the player.