VOB to AAC Converter

How to Convert VOB to AAC Online

1. Upload Your VOB File: Drag and drop or click "+ Add Files" to add one or more .VOB files from a DVD's VIDEO_TS folder. Batch upload is supported, so you can queue every VOB chapter at once.
2. Pick Quality Preset or Bitrate: Default is the "Highest" quality preset. For finer control, switch to Constant Bitrate and pick a value (128 kbps is a good baseline, 256 kbps or 320 kbps for music). Use Custom Bitrate to type any value, or Specific file size to cap the output in MB. Variable Bitrate is also available with AAC-tuned ranges (96k–112k, 64k–72k, etc.).
3. Set Audio Channel, Sample Rate, and Trim (Optional): Keep "Audio Channel" and "Audio Sample Rate" on Original to inherit the DVD's track (typically 48 kHz, AC-3 5.1 downmixed to stereo for AAC). Use Trim to grab just a song, scene, or chapter range instead of the whole VOB.
4. Convert and Download: Click "Convert". Files run on our servers (.VOB is too heavyweight for server-side decoding) — no watermark, no sign-up, no email gate.

Why Convert VOB to AAC?

VOB (Video Object) is the container DVD-Video uses inside VIDEO_TS/. It is based on the MPEG program stream and typically multiplexes MPEG-2 video with one of four audio tracks the DVD-Video spec allows: Dolby Digital (AC-3), DTS, MPEG-1 Audio Layer II (MP2), or LPCM. AAC isolates just the audio track and re-encodes it into a modern lossy codec that plays natively on iPhone, iPad, Android, iTunes/Apple Music, YouTube, and virtually every car head unit built since the mid-2000s.

• Rip the soundtrack from a DVD you own — Concert DVDs, live comedy specials, documentary commentaries, and language-learning discs are often only available on physical media. AAC at 192–256 kbps gives near-CD listening quality at roughly one-fifth the size of LPCM.
• Drop hours of audio onto a phone — A two-hour DVD soundtrack at AC-3 448 kbps is ~240 MB. Re-encoded to AAC at 128 kbps it drops to about 110 MB — half the storage, with quality the ear treats as effectively identical for spoken content.
• Edit a podcast or video essay — DAWs like Logic, GarageBand, Audition, and Reaper read AAC directly. VOB usually needs a demux step first, which AAC sidesteps.
• Embed in MP4/M4A for streaming — AAC is the default audio codec inside the MP4 family, so a VOB-to-AAC step is a prerequisite for re-wrapping the audio into a M4A container for Apple devices or feeding it to HLS / DASH pipelines.
• Send by email, Slack, or Discord — AAC's efficiency (96–128 kbps sounds clean for voice) keeps clips under the typical 8–25 MB attachment caps that VOBs blow past in seconds.
• Archive language audio separately — Many DVDs ship with 2–8 alternate audio tracks (dubs, commentaries, descriptive audio). Extracting each to AAC gives you a small, labeled, search-friendly library.

VOB vs AAC — Format Comparison

AAC Bitrate Quick Guide (for VOB audio)

Frequently Asked Questions

Why does my DVD have multiple .VOB files instead of one?

The DVD-Video spec caps each .VOB at 1 GB so the file system stays compatible with older players. A two-hour movie is typically split into VTS_01_1.VOB, VTS_01_2.VOB, VTS_01_3.VOB, and so on — all part of the same continuous track. Upload them in order; the converter will process each as its own AAC file. To stitch them into one continuous audio file before converting, use a DVD remux tool (HandBrake, MakeMKV) to produce a single MKV or MP4 first.

Will this work on a copy-protected commercial DVD?

No. Most commercial DVDs are encrypted with CSS (Content Scramble System) and many also use ARccOS or Sony's encryption. A ripped, decrypted .VOB will upload and convert fine, but the encrypted file straight off the disc will fail. You need to decrypt locally first (HandBrake with libdvdcss on macOS/Linux, or MakeMKV on Windows) — that step has to happen on your machine because the keys cannot leave the disc.

What audio codec is inside my VOB — AC-3, DTS, MP2, or LPCM?

Most commercial Region 1/2 DVDs use Dolby Digital (AC-3) at 192 kbps stereo or 384–448 kbps 5.1. Region-free music DVDs and concert discs often include a DTS track (754 or 1,510 kbps). Older PAL DVDs sometimes use MPEG-1 Audio Layer II. LPCM is rare and only appears on a handful of audiophile releases. The converter auto-detects whichever track is the default and re-encodes it as AAC — you don't need to pick.

Does converting downmix 5.1 surround to stereo?

By default, yes. Keeping "Audio Channel" on Original preserves the channel count when the target codec supports it; AAC in this converter outputs stereo for VOB sources, which is what you want for phones, earbuds, and car stereos. If you need a true 5.1 AAC track (AAC-LC supports up to 48 channels per the MPEG-4 spec), most playback devices ignore extra channels anyway, so stereo is the practical choice.

Why is AAC a better choice than MP3 for VOB audio?

AAC is the successor codec — it was designed by the same MPEG group specifically to fix MP3's weaknesses. At equal bitrates AAC has finer frequency resolution (1024 spectral coefficients per frame vs MP3's 576) and handles transients like cymbal hits cleaner. A 128 kbps AAC file is roughly comparable to a 192 kbps MP3, so you get about 30% smaller files at the same perceived quality. AAC is also the default audio inside MP4, YouTube, and Apple Music. If you specifically need MP3 for an older player, use VOB to MP3 instead.

Will the AAC file play on my old car stereo?

If the car was built after about 2007, yes — AAC playback over USB or aux became standard on most head units (Pioneer, Kenwood, Alpine, factory OEM) once iPod integration shipped. Pre-2007 cars and very basic aftermarket decks may only read MP3 and WMA, in which case convert to MP3 or WAV instead. Burning the AAC to a CD-R as a data disc also works on most CD/MP3-capable head units.

How long is the extracted audio compared to the VOB runtime?

Identical — audio extraction doesn't speed up or slow down the track. A 60-minute DVD chapter becomes a 60-minute AAC file. To grab a shorter section, use the Trim control before clicking Convert: enter a start time and duration, and you'll get just that slice instead of the full chapter.

Can I extract just one chapter or song without converting the whole disc?

Yes, two ways. (1) Upload just the .VOB file that contains the chapter you want — DVD chapters typically map to specific .VOB segments. (2) Upload the larger VOB and use Trim to specify a start time and duration. For more advanced editing after extraction (fade in/out, splice multiple sections), pair this with our Audio Cutter or Audio Compressor to tighten file size further.

Why does the file size estimate look so small compared to the VOB?

A DVD .VOB is mostly video — the audio is usually 5–10% of the total bytes. A 5 GB feature-length VOB might only hold ~250 MB of AC-3 audio; re-encoded to 128 kbps AAC that drops to roughly 110 MB. You're not losing the audio content, you're discarding the video stream that was bulking up the file.