Convert RealMedia Variable Bitrate (.rmvb) to Apple Lossless Audio Codec (.alac) 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 .m4a file when it's ready.
Apple Lossless Audio Codec (ALAC) compresses audio without any data loss, typically achieving 40-60% size reduction compared to PCM. RMVB files store audio using RealNetworks' proprietary codecs at bitrates usually between 64-128 kbps. Converting RMVB to ALAC extracts the audio and wraps the decoded signal in Apple's lossless container. While the source audio is already lossy, ALAC ensures no further degradation through the conversion pipeline.
ALAC integrates natively with Apple's ecosystem — iTunes, Apple Music, iPhone, iPad, HomePod, and Apple TV all handle ALAC without transcoding. For users managing audio libraries on Apple devices, ALAC is the preferred lossless format. Extracting RMVB audio to ALAC creates Apple-native files ready for immediate library import.
FFmpeg decodes the RealAudio stream and re-encodes it using the ALAC encoder into an M4A container. The lossless encoding uses adaptive linear prediction to represent the audio efficiently without discarding any data. Output preserves the decoded sample rate and bit depth.
ALAC faithfully preserves the decoded RealAudio quality — every PCM sample from the decoder is retained exactly. Since RMVB audio is already lossy (typically 64-128 kbps RealAudio), ALAC cannot improve the quality, but it guarantees zero additional loss through all future edits and format changes.
| Device | RMVB | ALAC |
|---|---|---|
| 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
8MB free, 50MB Nitro
RMVB to ALAC conversion is ideal for Apple ecosystem users who want to preserve RMVB audio at the highest possible quality. The lossless container ensures the decoded audio remains pristine through any future use.
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| No |
| الميزة | RMVB | ALAC |
|---|---|---|
| الاسم الكامل | RealMedia Variable Bitrate | Apple Lossless Audio Codec |
| الامتداد | .rmvb | .m4a |
| الأفضل لـ | Variable bitrate | Lossless |