Convert RealMedia Variable Bitrate (.rmvb) to Advanced Audio Coding (.aac) online for free. Fast, secure video conversion with no watermarks or registration.
Conversion settings — add a file to adjust
Upload your .rmvb file by dragging it into the upload area or clicking to browse.
Choose your output settings. The default settings work great for most files.
Click Convert and download your .aac file when it's ready.
RealMedia Variable Bitrate files contain audio encoded with RealAudio codecs — typically RealAudio 10 (RAAC, which is actually AAC-based) or older RealAudio 8/9 (based on ATRAC3-like technology). AAC (Advanced Audio Coding) is the modern standard for lossy audio, used by Apple Music, YouTube, Spotify, and virtually all streaming services. Extracting audio from RMVB into AAC converts proprietary RealAudio into the world's most supported lossy audio format.
RealAudio streams locked inside RMVB files are inaccessible to modern audio players and services. AAC works everywhere — iOS, Android, Windows, macOS, web browsers, car stereos, and smart speakers. Extracting the audio also eliminates video data, reducing file size by 90-95%. If the source RMVB uses RealAudio 10 (which is AAC-based), the conversion may be near-lossless.
FFmpeg decodes the RealAudio stream from the RMVB container — handling RA8 (Cook), RA9 (AAC), or RA10 (AAC-HE) codecs — and re-encodes to AAC-LC using the native AAC encoder. Output defaults to 192 kbps VBR stereo at the source sample rate (typically 44.1 kHz). If the source uses RealAudio 10 (already AAC-based), the decoder-encoder path is particularly efficient.
RMVB audio tracks are typically 64-128 kbps RealAudio, which is already lossy. Re-encoding to AAC at 192 kbps ensures no further quality degradation — you can't lose what wasn't there. At 128 kbps AAC, quality is transparent relative to the RMVB source audio.
| Device | RMVB | AAC |
|---|---|---|
| Windows PC | Partial | Partial |
| macOS | Partial | Native |
| iPhone/iPad | Partial | Native |
| Android | Partial | Partial |
| Linux | Partial | Partial |
| Web Browser | No |
Resolution: 1920x1080
Bitrate: 8-12 Mbps
H.264 recommended for fast processing
Resolution: 1080x1080
Bitrate: 3.5 Mbps
Square or 9:16 for Reels
Resolution: 1080x1920
Bitrate: 4 Mbps
9:16 vertical, under 60s ideal
Resolution: 1280x720
Bitrate: 5 Mbps
Under 140s, 512MB max
Resolution: 960x540
Bitrate: 2 Mbps
16MB limit for standard, 64MB for document
Resolution: 1280x720
Bitrate: 4 Mbps
RMVB to AAC extraction liberates audio from RealNetworks' proprietary container into the universal lossy audio standard. It's straightforward, fast, and produces files compatible with every modern device and platform.
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8MB free, 50MB Nitro
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| Funktion | RMVB | AAC |
|---|---|---|
| Fulde navn | RealMedia Variable Bitrate | Advanced Audio Coding |
| Filendelse | .rmvb | .aac |
| Bedst til | Variable bitrate | Superior to MP3 |