Step 1: Provide your MP4 files using the button above or by toss and let go.
Step 2: Click the 'Convert' button to start the conversion.
Step 3: Fetch your converted VOB files.
MP4 to VOB Conversion FAQ
How do I convert MP4 to VOB without re-encoding the video stream?
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When the MP4 and VOB containers can both carry the same codec (H.264, H.265, VP9, AV1), the converter falls back to a remux: the elementary streams are copied byte-for-byte into the VOB container and only the wrapper changes. A remux of a 1 GB MP4 into VOB typically finishes in 5-15 seconds with zero quality loss. Almost every MP4 in the wild is H.264 video with AAC audio; the container also legally holds HEVC, AV1 and VP9. A VOB holds MPEG-2 video, AC-3 or PCM audio, and DVD subpicture subtitle streams, split into 1 GB segments by the DVD spec.
Can the VOB hold more than one audio track?
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Yes, and it is a real upgrade over MP4. VOB treats every audio stream as a first-class track, so an original-language mix, a dub and a director commentary can live in one file with the player switching between them on demand. VOB preserves the whole DVD payload — multiple angles, multiple audio languages and subtitle tracks all survive inside it.
Does VOB support chapter markers that MP4 did not?
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It does. VOB stores chapters as container metadata, so a long recording can be navigated by section instead of by scrubbing a progress bar. MP4 has nowhere to put that information, so if the source shipped with a chapter list it was in a sidecar file — hand that to the converter and it gets written into the VOB.
Can I still embed the file on a web page after converting MP4 to VOB?
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Not directly. MP4 plays inline in every browser; VOB does not, so a page embedding it falls back to a download link or an empty player frame. If the file is destined for a website, keep the MP4 for the web and treat the VOB as the archive or editing copy. VOB is split across files, may be CSS-encrypted, and carries navigation packets that confuse general-purpose players.
Why would I convert MP4 to an older format like VOB?
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Because a lot of hardware never learned anything newer and never will. DVD players, in-car head units, camcorder playback modes, industrial displays and plenty of broadcast ingest equipment accept VOB and nothing else. The conversion is a deliberate step down in efficiency, bought in exchange for working on a device that has no other option.
Will multi-track audio survive MP4 to VOB conversion?
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Yes — every audio track in the MP4 (director commentary, alternate languages, descriptive audio) is preserved in the VOB when the target container supports multi-stream audio. MKV and MOV handle unlimited audio tracks; MP4 supports many but some hardware players only see track 1; WebM is capped at one Opus / Vorbis track. VOB is the Video Object container found in the VIDEO_TS folder of every DVD — an MPEG-2 program stream with DVD-specific navigation data added.
Are subtitle tracks preserved when converting MP4 to VOB?
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Soft subtitles (selectable tracks) survive when VOB can carry them: MKV holds SRT, ASS, SSA, PGS, VobSub natively; MP4 only holds mov_text (a stripped-down format). Converting an MKV with ASS styled subs to MP4 will typically downgrade them to mov_text or burn them in. Hardsubs (burned into the video) carry over regardless.
Does MP4 to VOB keep chapter markers / DVD-style navigation?
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Chapter metadata transfers between MP4 and VOB whenever both containers support a chapter atom (MKV, MP4, MOV). WebM stores chapters in a Matroska-compatible block, so MKV <-> WebM chapters round-trip cleanly. AVI has no chapter spec at all, so an AVI source arrives with no chapters to carry across and an AVI target cannot store the ones it was handed; add markers manually afterwards if you need them.
What about MKV attachments (fonts, cover art) when going MP4 to VOB?
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MKV is the only mainstream container that stores arbitrary attached files (TTF fonts for ASS subs, JPG cover art, fan-translated PDF inserts). Going from MP4 to VOB drops these attachments when VOB is not MKV — the elementary streams convert, but the attached payload stays in the source. Keep MP4 as a backup if you depend on attached fonts.
Which codec does the VOB output use by default?
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The default codec is chosen to match the VOB container conservatively: MKV defaults to H.265 (HEVC) for better compression; MP4 defaults to H.264 for the widest device support; WebM defaults to VP9; AVI uses MPEG-4 ASP (DivX/Xvid lineage). Override via the advanced codec dropdown — AV1 is available for MKV / WebM where you want maximum compression and can wait through the encode.
How does HDR (HDR10, Dolby Vision) survive MP4 to VOB?
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HDR static metadata (HDR10 mastering display values, max content light level) carries through to VOB when both containers and the chosen codec support it (HEVC, AV1 in MKV / MP4). Dolby Vision is more fragile — DV profile 5 / 7 / 8.1 in MP4 commonly survives only into MKV with HEVC; converting to a VOB container that does not carry the DV layer flattens to HDR10.
Will the MP4 to VOB converter keep variable framerate (VFR)?
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MKV and WebM record real per-frame timestamps and handle VFR natively, so MP4 VFR survives into a VOB of those formats with no resampling. MP4 nominally stores timestamps too but some players assume CFR; the converter exposes a "force CFR" toggle that resamples VFR MP4 to 24 / 30 / 60 fps VOB for problematic targets.
