VOB to MJPEG Converter

How to Convert VOB to MJPEG Online

1. Upload Your VOB File: Drag and drop, or click "+ Add Files" to select your .vob files (typically pulled from the VIDEO_TS folder of a DVD). Batch upload is supported, and each VOB segment on a DVD is capped at 1 GB by the DVD-Video spec.
2. Pick a Quality Preset: The default is Very High (Recommended), which keeps MJPEG near visually lossless. Drop to High or Medium if file size matters more than frame fidelity, or switch to Constant Quality to dial qscale directly — MJPEG uses ffmpeg's -q:v range of 2 (best) to 31 (worst), with 2-5 the usual editing sweet spot.
3. Set Resolution and Trim (Optional): Choose Keep original to preserve the DVD's native 720x480 (NTSC) or 720x576 (PAL), pick a Preset Resolution (240p through 8K), enter custom Width x Height, or scale by Resolution Percentage. Use Trim with Time Range to extract a single chapter instead of the whole VOB.
4. Convert and Download: Click "Convert" and grab your .mjpeg (or .avi wrapping MJPEG, depending on your editor's preference). No sign-up, no watermark, no email required.

Why Convert VOB to MJPEG?

VOB (Video Object) is the DVD-Video container that wraps MPEG-2 video, AC-3 or PCM audio, subtitles, and navigation data into one stream — but those long-GOP MPEG-2 frames are painful to scrub frame-by-frame in an NLE. Motion JPEG strips the temporal compression and stores each frame as an independent JPEG, trading file size for frame-accurate editing.

• Frame-accurate DVD editing — DaVinci Resolve, Premiere Pro, and Final Cut Pro all scrub MJPEG smoothly because every frame is a keyframe. With long-GOP MPEG-2 from a VOB, the editor has to decode an entire 12-15 frame GOP to land on one frame, which makes timeline scrubbing sluggish on older hardware.
• Salvaging footage from old DVD camcorders — Sony Handycam DCR-DVD models and Hitachi DZ-MV series wrote .vob straight to mini-DVDs. Re-encoding to MJPEG gives you an intermediate that survives multiple edit passes without the generation loss MPEG-2 produces on re-encode.
• Archive masters for color grading — MJPEG at qscale 2 retains roughly 1:10 to 1:20 compression with most of the original chroma detail intact, which is closer to a DI master than the long-GOP MPEG-2 inside a VOB.
• Feeding legacy tools that demand MJPEG — older versions of Avid Media Composer, certain scientific imaging packages, and some PLC/CCTV review software only ingest MJPEG. Converting the VOB once gets you a clip the tool will actually open.
• Web-friendly playback without a transcode step — MJPEG plays natively in Safari, Chrome, Firefox, and Edge, so a stripped MJPEG of a short DVD clip can be embedded directly without a separate H.264 transcode for browser support.

VOB vs MJPEG — Format Comparison

MJPEG Quality Preset Guide

Frequently Asked Questions

Why is my MJPEG file so much larger than the original VOB?

MJPEG is intraframe-only — every frame is encoded independently as a JPEG, with no inter-frame prediction. MPEG-2 inside a VOB uses long-GOP compression (one I-frame followed by 11-14 P/B frames that only store the difference from neighbors). At equivalent visual quality, MJPEG typically lands at 1:10 to 1:20 compression versus MPEG-2's 1:30 to 1:50. A 4 GB DVD VOB can easily produce an 8-15 GB MJPEG. Drop to a higher qscale or lower the resolution if size matters.

Does the audio from my VOB survive the conversion?

MJPEG itself is a video-only codec, so audio is preserved by remuxing it into the output container (typically AVI or MOV) alongside the MJPEG video track. Your VOB's AC-3 or PCM audio is kept and re-paired with the MJPEG video. If you need an audio-free MJPEG .mjpeg raw stream, you can convert to a different output format afterward, or look at VOB to MP4 if your editor accepts H.264 instead.

What's the right qscale value for editing work?

For an editing intermediate that won't generation-loss across multiple cuts and color passes, qscale 2-5 is the standard range — visually indistinguishable from the source after one encode pass. qscale 6-10 is fine for online review copies. Anything above qscale 14 starts showing JPEG blocking on smooth gradients and skin tones. ffmpeg's MJPEG encoder accepts 2-31, where 2 is best quality and 31 is worst.

Will it work with copy-protected DVD VOBs (CSS-encrypted)?

No. Commercial DVDs use Content Scramble System (CSS) encryption, and the encrypted VOB stream cannot be transcoded until it's been decrypted. You'll need to rip the DVD to an unprotected VOB first using tools like MakeMKV or HandBrake (within the bounds of your local copyright law). Once you have a plain unencrypted .vob file, upload it here.

Can I extract a single chapter instead of converting the whole VOB?

Yes. Expand Advanced Options, enable Trim, switch from "Unchanged" to Time Range, and enter your in/out timestamps in HH:MM:SS.mmm format. Only the trimmed segment is converted to MJPEG, which is much faster than full-VOB conversion when you only need one scene. For audio-only segment extraction try VOB to MP3 instead.

Why does my DVD have multiple VOBs (VTS_01_1.VOB, VTS_01_2.VOB, etc.) — should I join them first?

DVDs split a single title across multiple 1 GB VOB segments to stay within FAT32-era filesystem limits, but the data is logically contiguous and meant to be played back-to-back. For editing, it's usually easier to convert each segment individually and join the resulting MJPEG clips in your NLE. If you need them merged into a single MJPEG stream before editing, upload all segments together and the converter will queue them as separate jobs.

Should I pick MJPEG or ProRes/DNxHD for editing?

MJPEG is the right choice when (a) your editor doesn't support ProRes/DNxHD natively, (b) you need a format that plays in browsers without a player install, or (c) you want minimal CPU during scrubbing on older machines. ProRes and DNxHD have better compression efficiency at equivalent quality, but they're proprietary intermediates with narrower software support. For older Avid/Premiere workflows and broad compatibility, MJPEG is still the safer bet.

What container will the output use — .mjpeg, .avi, or .mov?

The output file extension is .mjpeg (raw MJPEG bitstream). If your editor needs the video re-wrapped into a more universally compatible container with proper audio sync, run a second pass through MJPEG to MP4. Most modern NLEs accept the raw .mjpeg stream directly, but older Avid Media Composer workflows typically prefer MJPEG inside a MOV wrapper.

Is there a file size limit?

Single files up to 1 GB are supported on the free tier (which matches the natural per-segment cap of DVD VOBs anyway). Files process on our servers — no account required, no email collected, and files are removed from servers shortly after the download completes.