Video Format Comparison

VOB vs MP4: DVD Video Format vs Modern Container

VOB (Video Object) is the MPEG-2 video container used inside DVD-Video discs. A typical DVD splits content into multiple VOB files (1 GB each) within a VIDEO_TS folder. VOB was designed for physical disc playback with fixed structure — it's not suitable for digital storage, streaming, or modern device playback. Converting DVD VOB files to MP4 consolidates the fragments into a single modern file with dramatically better compatibility.

VOBvsMP4

Quick Verdict

Use VOB when…

Keep VOB files only if you're maintaining a DVD disc structure for DVD player playback. For all other purposes, convert to MP4.

Use MP4 when…

Use MP4 for any non-DVD use — device playback, sharing, web upload, digital storage, or editing. MP4 is universally supported and much more flexible than VOB.

VOB vs MP4: Feature Comparison

Feature	VOB	MP4
Container type	DVD Video Object (MPEG-2 Program Stream)	MPEG-4 Part 12
Video codec	MPEG-2 (older, larger files)	H.264, H.265, or others
Audio codec	AC3 (Dolby Digital), DTS, or LPCM	AAC, MP3, or others
Device support	DVD players, some media players	Universal
File size (90 min)	~4–7 GB per disc	~1–3 GB (H.264 encoding)
Split files	Multiple VOB files (max 1 GB each)	Single file, any size
Web streaming	Not supported	Excellent
Subtitles	DVD subtitles (bitmap/VOBSUB)	SRT, ASS, or embedded VOBSUB

When VOB wins

✓Container type: DVD Video Object (MPEG-2 Program Stream)
✓Video codec: MPEG-2 (older, larger files)
✓Audio codec: AC3 (Dolby Digital), DTS, or LPCM

When MP4 wins

✓Container type: MPEG-4 Part 12
✓Video codec: H.264, H.265, or others
✓Audio codec: AAC, MP3, or others

Frequently asked questions

How do I convert VOB to MP4?

Method 1 (HandBrake, recommended): open HandBrake → File → Open Source → select the VIDEO_TS folder or individual VOB files → choose 'Fast 1080p30' preset → set format to MP4 → Start Encode. Method 2 (FFmpeg): ffmpeg -i input.vob -c:v libx264 -crf 22 -c:a aac -b:a 256k output.mp4.

Can I merge multiple VOB files into one MP4?

Yes. FFmpeg: cat VTS_01_1.VOB VTS_01_2.VOB VTS_01_3.VOB | ffmpeg -i - -c:v libx264 -c:a aac output.mp4. Or: ffmpeg -i 'concat:VTS_01_1.VOB|VTS_01_2.VOB|VTS_01_3.VOB' -c:v libx264 -c:a aac output.mp4. HandBrake handles multi-VOB DVDs automatically when you point it at the VIDEO_TS folder.