Free online VOB to M2V converter

Some DVD authoring and broadcast-editing applications require an elementary MPEG-2 video stream instead of a DVD container. Converting a VOB to M2V extracts the video while leaving DVD audio, subtitles, menus, and navigation data behind.

What the VOB format is

VOB, or Video Object, is the container used by DVD-Video discs and DVD authoring software such as DVDStyler, Nero Vision, and commercial DVD production tools. A typical disc stores title content across files such as VTS_01_1.VOB, VTS_01_2.VOB, and subsequent segments.

A VOB is based on an MPEG program stream and can contain MPEG-2 video, several audio tracks, subtitles, navigation packets, and other DVD-specific data. The video is usually interlaced MPEG-2 at 720×480 pixels for NTSC or 720×576 pixels for PAL. You encounter VOB files after copying unencrypted DVD-Video content, exporting from DVD authoring software, or opening a DVD's VIDEO_TS folder.

What the M2V format is

M2V is an elementary MPEG-2 video stream. It contains video only; audio, subtitles, menus, chapter information, and DVD navigation commands are stored nowhere in the resulting file unless they are preserved separately.

Editing, broadcast, and DVD-authoring applications use M2V when they need a separate video asset. Its main advantage is direct access to the MPEG-2 picture stream without the DVD program-stream structure. Because standard DVD VOB video is already MPEG-2, extraction can usually be performed without re-encoding, avoiding another generation of quality loss.

How to actually convert VOB to M2V

Using FFmpeg without re-encoding

FFmpeg is suitable when the VOB contains ordinary, unencrypted MPEG-2 video. Open a terminal in the folder containing the file and run:

ffmpeg -i input.vob -map 0:v:0 -c:v copy -an -f mpeg2video output.m2v

-map 0:v:0 selects the first video stream, -c:v copy copies the compressed video without decoding and re-encoding it, -an excludes audio, and -f mpeg2video writes an elementary MPEG-2 video stream. Replace input.vob and output.m2v with the actual filenames.

If the VOB contains multiple video streams, inspect them first:

ffmpeg -i input.vob

Use a different stream index in -map 0:v:1 if necessary. To process a title split across several VOB files, first create a text file named list.txt containing entries such as:

file 'VTS_01_1.VOB'
file 'VTS_01_2.VOB'
file 'VTS_01_3.VOB'

Then concatenate the segments before extracting the video:

ffmpeg -f concat -safe 0 -i list.txt -map 0:v:0 -c:v copy -an -f mpeg2video output.m2v

The files must belong to the same DVD title and appear in their original order. A DVD title-aware application may be preferable when the VOBs contain repeated menu material or interleaved program chains.

Using the 101convert website

You can convert the file on the 101convert.com website for free without installing software: select the VOB file, choose M2V as the output format, start the conversion, and download the result. This method is appropriate for a single non-encrypted file; large DVD titles, sensitive recordings, and multi-file titles are better handled locally with FFmpeg.

Quality, compatibility, and limitations

Stream copying preserves the original MPEG-2 picture exactly, but it does not improve resolution, bitrate, interlacing, or compression artifacts. The output may remain interlaced, so enable deinterlacing in the application that displays or edits it when the final target is progressive video.

M2V has no audio track. Keep the original audio separately if an authoring or editing application needs synchronized sound; extracting it requires a separate command and a compatible audio format. Subtitles, chapters, aspect-ratio flags, and DVD menus are also not carried into the elementary stream.

Encrypted commercial DVDs cannot normally be processed by FFmpeg from their original disc files. Copy protection must be handled lawfully with appropriate DVD software before conversion. Some applications expect an M2V stream with a particular MPEG-2 profile or frame rate, so verify the source's NTSC/PAL standard and the target application's import requirements before using stream copy.