Convert Windows Media Video (.wmv) 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 .wmv 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.
WMV files carry audio encoded as WMA (Windows Media Audio) — a Microsoft-proprietary codec that Apple devices cannot play natively. ALAC (Apple Lossless Audio Codec) is Apple's lossless compression standard, open-sourced in 2011, delivering roughly 50% compression of PCM audio with guaranteed bit-perfect reconstruction. Converting WMV to ALAC extracts the audio from Microsoft's format and compresses it losslessly in Apple's ecosystem-native codec, stored in an M4A container compatible with every Apple device.
ALAC is the default lossless audio format for Apple Music, iTunes, iPhone, iPad, HomePod, and AirPlay 2. If you have WMV recordings with audio you want to preserve in lossless quality for the Apple ecosystem, ALAC provides bit-perfect audio in a format that syncs naturally to iCloud Music Library and plays on every Apple product without third-party apps.
FFmpeg decodes the WMA audio stream from the ASF container to raw PCM, then encodes to ALAC using the native ALAC encoder. The output is stored in an M4A container (MPEG-4 Part 14 audio). Sample rate (44.1/48 kHz), bit depth (16/24-bit), and channel layout are preserved. ALAC's lossless compression typically achieves 40–60% size reduction compared to raw PCM, depending on audio complexity.
ALAC is mathematically lossless — decoded audio is identical to the input PCM at the bit level. If the WMV source uses WMA Lossless, the ALAC output is a perfect transcodification of the original audio. If the source is standard WMA (lossy), ALAC preserves the full decoded quality without adding any degradation.
| Device | WMV | ALAC |
|---|---|---|
| Windows PC | Native | 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
WMV to ALAC conversion moves audio from Microsoft's proprietary format into Apple's lossless standard. The result is a space-efficient, bit-perfect audio file that works seamlessly across the entire Apple ecosystem.
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Funcționează oriunde
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| Caracteristică | WMV | ALAC |
|---|---|---|
| Nume complet | Windows Media Video | Apple Lossless Audio Codec |
| Extensie | .wmv | .m4a |
| Cel mai potrivit pentru | Windows native | Lossless |