VOB to FLAC Converter

How to Convert VOB to FLAC Online

1. Upload Your VOB File: Drag and drop your .vob file or click "Add Files" to select it. DVD rips often arrive as VTS_01_1.VOB, VTS_01_2.VOB, etc. — upload them in order if you want one FLAC per chapter, or merge with your DVD ripper first to get a single track. Batch uploads are supported.
2. Set Compression Level: Default is 5 (ffmpeg's middle-of-the-road preset). Lower numbers (1-4) encode faster and decode faster on weak hardware; higher numbers (8-12) shrink the file 1-3% more at the cost of much slower encoding. Level 8 matches the FLAC reference encoder's maximum; levels 9-12 are ffmpeg-only experimental presets with diminishing returns.
3. Audio Channel and Sample Rate (Optional): Leave both at "Original" to preserve the DVD's native layout — typically 48 kHz stereo for music DVDs, or 5.1-channel AC-3 for movie soundtracks. Downmix to Mono or Stereo if your target player or library doesn't handle multichannel. FLAC supports up to 8 channels at sample rates from 1 Hz to over 1 MHz, so any DVD audio fits.
4. Trim (Optional) and Convert: Use Trim to extract a single song or scene by setting start time and duration. Click "Convert" — files process server-side and the FLAC downloads to your browser. No watermark, no sign-up, no install.

Why Convert VOB to FLAC?

VOB ("Video Object") is the MPEG-2 program stream container DVDs use, broken into 1 GiB chunks inside the VIDEO_TS folder. The audio inside is usually Dolby Digital (AC-3) at 192-448 kbps, occasionally DTS, MPEG audio, or — on music DVDs — linear PCM. FLAC is a lossless codec that typically halves PCM file size while preserving every sample exactly, and it plays natively in Chrome, Edge, Firefox 51+, and Safari 11+. Extracting VOB audio to FLAC gives you an archival, tag-friendly, software-agnostic copy you can drop into Foobar2000, Plex, Roon, or a Jellyfin library.

• Archive concert and music DVDs — Rip a Talking Heads or Diana Krall DVD's PCM stereo or LPCM 5.1 mix to FLAC so the original samples survive even after the disc rots or the DVD drive dies.
• Feed a hi-fi music server — Plex, Jellyfin, Volumio, and Roon all index FLAC with embedded ID3/Vorbis tags. VOB doesn't show up in any music library.
• Edit dialog or score for a video project — Pull the AC-3 5.1 mix out to FLAC and load it into Audacity, REAPER, or DaVinci Resolve without dragging the whole DVD video along.
• Extract isolated tracks — Concert DVDs often place each song on its own chapter, which maps to its own VOB. Trim and export per-song FLACs that you can tag individually.
• Replace lossy DVD-Audio rips with PCM-preserving copies — If your VOB came from a DVD-Audio disc with LPCM, FLAC is bit-identical; AC-3/DTS sources stay lossy from the original encode but won't degrade further.
• Build a portable backup — A 4.7 GB DVD-5 with AC-3 audio yields a FLAC archive small enough to carry on a phone or USB stick alongside the disc image.

VOB vs FLAC — Format Comparison

FLAC Compression Level Guide

Frequently Asked Questions

Will the FLAC sound better than the original VOB audio?

No — FLAC is lossless, but lossless only means "no quality is lost during this encode." If your VOB contains AC-3 at 384 kbps (typical DVD movie soundtrack), the audio was already lossy when the disc was authored. Converting to FLAC freezes that lossy decode in a lossless wrapper; you preserve every artefact at full fidelity. The only case where FLAC equals the original is if the VOB contains LPCM (common on music DVDs and DVD-Audio).

Will 5.1 surround sound carry over?

Yes — FLAC supports up to 8 discrete channels, which covers 5.1 (six) and 7.1 (eight). Leave "Audio Channel" set to Original to preserve the multichannel layout from a DVD's AC-3 or DTS track. If your music player can't handle multichannel FLAC, switch the dropdown to Stereo for a downmix or Mono for a single-channel summary.

My DVD rip is split into multiple VOB files. How do I get one FLAC per movie or per song?

DVDs are chunked into 1 GiB VOB segments — that's a filesystem constraint, not a content boundary. For one FLAC per song, upload each chapter VOB separately. For one FLAC per movie, merge the VOBs first using your DVD ripper (HandBrake, MakeMKV, or just cat VTS_01_*.VOB > full.vob on the command line), then upload the merged file. The Trim option also lets you carve a single track out of a multi-song VOB without merging.

Why not use MP3 or WAV instead?

MP3 is 8-10x smaller but lossy — fine for a phone, wrong for archival. WAV is the same uncompressed PCM as FLAC but typically twice the size on disk and has no embedded tagging beyond a clunky LIST/INFO chunk. FLAC sits in the sweet spot: lossless, half the size, and supports proper Vorbis-comment metadata that Plex, Roon, and Jellyfin all read.

What sample rate and bit depth will the FLAC use?

By default, the FLAC inherits whatever the VOB's audio stream uses — 48 kHz is the DVD-Video standard, and AC-3/LPCM run at 16- or 24-bit. Leaving Sample Rate on Original avoids any resampling. If you specifically need 44.1 kHz to match a CD-based library, pick 44100 Hz from the dropdown, but be aware that converting 48 to 44.1 introduces a (lossless-to-lossy-step) resample, so the FLAC is no longer bit-identical to the disc.

Can I tag the resulting FLAC with artist, album, and track number?

Yes — FLAC uses Vorbis comments, the same flexible tag system OGG uses. Most metadata editors (Mp3tag, Picard, Kid3) read and write FLAC tags. VOB has no metadata fields at all, so you'll be filling these in fresh after the conversion. For concert DVDs, look up the tracklist on Discogs or MusicBrainz before tagging.

Why does the FLAC sometimes end up larger than the VOB?

Because you're comparing the audio-only FLAC against a video container. If your VOB is a 1 GiB chunk holding 30 minutes of MPEG-2 video plus AC-3 audio, the audio portion might be 80 MB — your FLAC will be around 200-300 MB after decoding AC-3 to PCM and re-encoding. The FLAC is smaller than the source PCM stream but larger than the lossy AC-3 stream inside the VOB. That's expected.

How does this compare to extracting with ffmpeg or HandBrake locally?

ffmpeg with -c:a flac -compression_level 5 does the same job; xconvert wraps that workflow in a browser. HandBrake decodes audio but generally won't output FLAC directly — its audio targets are AAC, MP3, AC-3, FLAC (since 1.0), and a few others. If you only need to extract one track, the browser version is faster than installing ffmpeg; for batch ripping an entire disc collection, the CLI is more efficient.

Can I further process the FLAC after conversion?

Yes. Convert FLAC to MP3 for a phone-friendly copy, or use Trim FLAC to cut intros and outros without re-encoding the audio. FLAC's lossless nature means you can transcode out to any other codec exactly once without compounding generation loss.