Free online VOB to M4V converter

Phones, video editors, and Apple-oriented media libraries may not accept DVD-era VOB files, while M4V provides a more compact MPEG-4 file for playback, editing, or sharing. Converting also combines a DVD title split across several VOB segments into one usable video file.

What VOB is

VOB (Video Object) is the main media container used by DVD-Video. It is stored in a VIDEO_TS folder and can contain MPEG-2 video, audio tracks, menu video, subtitles, and other multiplexed DVD content; navigation data is also defined by the disc's IFO files.

A feature-length title is commonly divided into files such as VTS_01_1.VOB, VTS_01_2.VOB, and VTS_01_3.VOB. DVD authoring software, disc-copying tools, and DVD playback software use this structure. When several segments belong to one title, open the complete VIDEO_TS folder instead of converting each VOB separately.

What M4V is

M4V is an MPEG-4 container associated with Apple software and devices. Converted files commonly use H.264 video and AAC audio, which are supported by many phones, media players, editors, Apple TV devices, and media servers.

M4V does not guarantee a smaller file by itself: the size reduction comes mainly from replacing DVD MPEG-2 with a suitably encoded H.264 stream. The .m4v extension does not inherently mean that a file is DRM-protected. Historically, Apple distributed some protected video as M4V, but files created by normal converters are generally unencrypted.

Convert VOB to M4V online

1. Open the converter on 101convert.com; no software installation is required.
2. Upload the VOB file, or select the relevant DVD title if the service accepts a complete VIDEO_TS folder.
3. Choose M4V as the output format and start the conversion.
4. Download the resulting file when processing finishes, then test its video, audio, and subtitle tracks.

For a DVD title split across multiple VOB files, use software that can read the entire VIDEO_TS folder; uploading one segment can produce an incomplete movie. Do not upload private or copyrighted material unless the service's storage, processing, and retention terms permit it.

Convert with HandBrake

1. Install HandBrake from its official website and choose File → Open Source.
2. Select the complete VIDEO_TS folder when possible. If several titles appear, choose the title whose duration matches the main feature.
3. Choose a suitable preset, such as Fast 480p30 for DVD-resolution output or Fast 720p30 when a larger scaled file is required.
4. On Summary, select MP4. HandBrake normally creates an MP4 container rather than exposing a separate M4V format option. Set the destination filename to movie.m4v if the application accepts a manually chosen extension, or encode as movie.mp4 and rename the extension to .m4v afterward. Renaming does not re-encode the file.
5. On Video, select H.264 (x264). Constant-quality RF 18–22 is a reasonable range for DVD-resolution material; lower RF values produce higher quality and larger files.
6. On Audio, select AAC for broad compatibility and retain only the language or commentary tracks needed. Preserve the source frame rate and avoid upscaling the original 720×480 NTSC or 720×576 PAL dimensions unless the destination requires it.
7. Choose Start Encode, then play the output on the intended device or application.

HandBrake can preserve or convert some audio and subtitle tracks, but DVD subtitles are bitmap-based and may not work as selectable subtitles in every M4V player. Burn in a required subtitle track when necessary, and verify forced subtitles before deleting the source.

Convert with FFmpeg

For a single, unencrypted VOB, FFmpeg can create an H.264/AAC M4V directly:

ffmpeg -i input.vob -map 0:v:0 -map 0:a:0? -c:v libx264 -crf 20 -preset medium -c:a aac -b:a 160k -movflags +faststart output.m4v

Use ffprobe input.vob to inspect streams. Add additional -map options for other audio tracks, and do not treat separately numbered VOB segments as independent movies; use a DVD-aware application for the complete title.

Quality and compatibility limits

H.264 re-encoding cannot restore detail already lost through DVD MPEG-2 compression. A moderate constant-quality setting usually preserves more detail than an aggressively low bitrate while still reducing size. DVD video may be interlaced; enable HandBrake's Decomb or Deinterlace filter only when motion shows combing artifacts, because filtering progressive footage can soften it.

Commercial DVDs may use CSS encryption, region restrictions, or other copy controls. Conversion software may not open protected content, and bypassing those controls may be restricted by local law. M4V with H.264 video and AAC audio is broadly supported, but some older programs recognize only .mp4; renaming output.m4v to output.mp4 changes only the filename extension and works only when the underlying streams and container are already compatible.