VOB to IRCAM Converter

Create IRCAM SDIF audio from DVD VOB files online

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DVD-Quality Research Audio

DVD VOB files carry quality audio content. IRCAM preserves that fidelity in a format designed for serious acoustic research.

Online Conversion

No CSound or DVD ripping tools required on your machine. Convert VOB to IRCAM entirely through your browser from any device.

VOB to IRCAM Direct

Extract DVD audio and encode IRCAM SDIF in one step. No intermediate formats — our converter handles the complete pipeline.

How to convert VOB to IRCAM

1

Select files from Computer, Google Drive, Dropbox, URL or by dragging it on the page.

2

Choose ircam or any other format you need as a result (more than 200 formats supported)

3

Let the file convert and you can download your ircam file right afterwards

About formats

VOB (Video Object) is the primary container format used on DVD-Video discs, defined as part of the DVD specification developed by the DVD Forum. The format first appeared with the DVD standard finalized in September 1996 and has since been used on billions of DVD discs produced worldwide. VOB files are based on the MPEG-2 program stream format, containing multiplexed MPEG-2 video alongside audio in AC-3 (Dolby Digital), DTS, MPEG-1 Layer II, or LPCM formats. Beyond audio and video, VOB files also carry DVD subtitle streams as bitmap overlays, navigation data for menu interaction, and chapter point information. The files reside in the VIDEO_TS directory on a DVD disc, with naming conventions (VTS_01_1.VOB, etc.) reflecting the title and part structure of the content. Individual VOB files are limited to approximately 1 GB to accommodate the UDF file system requirements, with longer content spanning multiple files seamlessly. The format supports both NTSC (720x480) and PAL (720x576) video resolutions at bit rates up to 9.8 Mbps for combined audio and video. Integration of video, multi-track audio, subtitles, and navigation into a single program stream made VOB a complete solution for consumer movie delivery. While streaming and newer disc formats have supplanted DVD for new content, VOB remains hugely relevant for accessing the vast library of existing DVD content.
Developer: DVD Forum
Initial release: September 1996
IRCAM sound files originate from the Institut de Recherche et Coordination Acoustique/Musique — one of the world's foremost computer music laboratories, founded by composer Pierre Boulez in Paris. The format was created in the early 1980s to serve the research needs of IRCAM and has since been adopted by academic and artistic communities working at the intersection of science and sound. An IRCAM file begins with a 1024-byte header containing a magic number, sample rate, channel count, and an encoding type field that supports linear PCM (16/32-bit integer and 32-bit float), mu-law, and A-law variants. The header block also accommodates free-form annotation text, allowing researchers to embed experiment metadata directly in the audio file. Because the payload is uncompressed by default, recordings maintain full fidelity through successive analysis and resynthesis cycles — essential in psychoacoustic experimentation. Software such as Csound, libsndfile, and SoX reads and writes the format natively. Key advantages include a well-defined header that eliminates parsing ambiguity, support for floating-point samples essential in scientific DSP work, and deep roots in the computer music community ensuring continued tooling.
Developer: IRCAM
Initial release: 1983

Frequently Asked Questions

Why convert VOB to IRCAM?

IRCAM SDIF is for academic music research. DVD VOB audio provides source material for acoustic analysis and sound research projects.

What reads IRCAM files?

CSound, MixView, and the IRCAM software suite handle this format natively. SOX also supports IRCAM SDIF for audio processing.

Does IRCAM preserve DVD quality?

IRCAM stores uncompressed audio. DVD-quality audio from VOB reaches research tools at full fidelity for detailed analysis work.

Can VOB surround audio convert?

IRCAM supports multi-channel data. DVD surround audio channels from VOB can be preserved based on the output configuration settings.

Is batch processing possible?

Upload multiple VOB files and convert them to IRCAM in a batch. Practical for building research audio datasets from DVD collections.