Convert Audio Video Interleave (.avi) 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 .avi 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.
AVI files from camcorders, screen recorders, and legacy editing software often contain audio encoded as PCM, MP3, or AC3. ALAC (Apple Lossless Audio Codec) is Apple's lossless compression format, introduced in 2004 and open-sourced in 2011. ALAC achieves roughly 50% compression of PCM data with bit-perfect reconstruction — every sample is identical on playback. Converting AVI to ALAC extracts the audio track and compresses it losslessly in an M4A container recognized by iTunes, Apple Music, and all iOS devices.
ALAC combines the quality guarantee of uncompressed PCM with file sizes roughly half as large, making it the optimal format for Apple ecosystem users who want lossless audio without the storage penalty. If you are building an iTunes library from AVI video recordings or need lossless audio for Apple-based music production, ALAC is the native choice — it plays seamlessly on every iPhone, iPad, Mac, Apple TV, and HomePod.
The conversion process demuxes the AVI file to extract the raw audio stream, decodes it to PCM (if compressed), then encodes to ALAC using FFmpeg's native ALAC encoder. The output is wrapped in an M4A (MPEG-4 Part 14) container. ALAC preserves the original sample rate (typically 44.1 kHz or 48 kHz), bit depth (16-bit or 24-bit), and channel layout. Compression ratio is typically 40–60% depending on audio content complexity — simple spoken word compresses more than dense orchestral music.
ALAC is mathematically lossless — the decoded audio is bit-for-bit identical to the input PCM. If the AVI source already contains lossy audio (MP3, AC3), the ALAC output will faithfully preserve the decoded quality without any additional degradation, though it cannot restore detail lost in the original encoding.
| Device | AVI | 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
8MB free, 50MB Nitro
AVI to ALAC conversion delivers lossless audio quality in Apple's native ecosystem format. It is the ideal choice for users who want perfect audio fidelity with broad Apple device compatibility and reasonable file sizes.
安全传输
HTTPS 加密上传
隐私优先
文件处理后自动删除
无需注册
即刻开始转换
随处可用
任何浏览器，任何设备
| No |
| 特性 | AVI | ALAC |
|---|---|---|
| 全称 | Audio Video Interleave | Apple Lossless Audio Codec |
| 扩展名 | .avi | .m4a |
| 最适合 | Windows native | Lossless |