RMVB to VOC Converter
Processing entirely on your device — large files may take a moment.
RealMedia Variable Bitrate and Creative Sound Blaster VOC exist for different jobs: RMVB is RealMedia with variable-bitrate video — the format Asian fan-sub communities distributed dramas and movies in throughout the 2000s. Convert VOC retro-game audio to WAV or MP3.
Because the whole conversion happens on your device, it is instant, unlimited and genuinely private — no accounts, no watermarks, no files on anyone's server. Multiple files are converted in one go.
How RMVB compares to VOC
| RMVB | VOC | |
|---|---|---|
| Structure | RM container + VBR RV40 video | Creative Voice file blocks (0x08 header) |
| Types / schema | RealVideo 4 + Cook/AAC audio | 8-bit PCM / ADPCM variants |
| Compatibility | ffmpeg, VLC | ffmpeg, Sound Blaster era tools |
| Best for | Drama and movie archive migration | Retro-game audio rescue |
How to convert RMVB to VOC
- 1
Select your files
Select your RMVB video.
- 2
Convert instantly
The engine demuxes the container and encodes the audio track into your chosen format.
- 3
Download results
Download the VOC audio — the video track is simply dropped.
About the RMVB format
RMVB is RealMedia Variable Bitrate — the 2000s fan-sub community's format of choice for distributing TV dramas and movies across dial-up-adjacent bandwidths. The VBR twist let action scenes take more bits than talking heads, which static-bitrate RM handled badly.
Conversion to MP4 is the standard migration: the RV40 video decodes through ffmpeg, and a modern H.264 re-encode is usually smaller at the same perceived quality.
+ Strengths
- ✓VBR suited the bandwidth of its era
- ✓Huge corpus of Asian drama content
- ✓Decodes through ffmpeg
! Limitations
- −Mostly SD resolution content
- −RV40 codec support varies by build
- −Licensing strings in some files
About the VOC format
VOC is the Creative Sound Blaster format — if a DOS game made a sound between 1989 and 1994, it was probably a VOC: 8-bit samples at exotic sample rates, with loop points, silence blocks and hardware-specific appendices that made each card sing differently.
ffmpeg decodes the standard sample blocks and converts VOC to WAV or MP3 — the cheapest time machine for retro-game audio.
+ Strengths
- ✓The DOS gaming era's audio format
- ✓Unique features: loops, silence, transfer blocks
- ✓Simple to decode
! Limitations
- −8-bit/11kHz era fidelity
- −Creative hardware extensions lost on convert
- −Rarely produced after 1995
Why convert RMVB to VOC?
There is a concrete reason this conversion exists: Mostly SD resolution content VOC sidesteps that — The DOS gaming era's audio format If that is your situation, the tool above settles it in seconds, entirely on your device.
Frequently asked questions
Is this RMVB to VOC converter really free?
Yes — completely free, with no sign-up, no watermark and no daily conversion limits. The site is supported by advertising.
Are my files uploaded to a server?
No. The conversion runs entirely inside your browser using WebAssembly, so your files never leave your device — that is what makes it instant and private.
Does it work on Windows, Mac, iPhone and Android?
Yes. Anything with a modern browser works: Windows, macOS, Linux, Android and iOS. No software installation is required.
Is there a file size limit for RMVB to VOC?
The only limit is your device's memory, since nothing is uploaded. Files up to a few hundred megabytes work fine on a modern desktop browser; very large files simply take a little longer.
Does converting RMVB to VOC re-encode my video?
Yes. The video is decoded and re-encoded with the settings chosen by the quality slider, which is what allows the format and size to change. For an archival copy, keep higher quality; for sharing, lower quality gives a much smaller file.
Will the audio track be kept?
Yes. The audio is carried over and re-encoded to the standard audio codec of VOC, staying in sync with the video. If your RMVB file has multiple audio tracks, the first one is used.