Convert QuickTime Movie (.mov) 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 .mov 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.
MOV files are Apple's QuickTime container, commonly holding H.264 or HEVC video with AAC or ALAC audio. ALAC (Apple Lossless Audio Codec) is Apple's lossless compression format, open-sourced in 2011, that reduces PCM audio to roughly 50-60% of original size without any data loss. Every Apple device — iPhone, iPad, Mac, Apple TV, HomePod — natively decodes ALAC.
Extracting audio from MOV to ALAC produces a lossless, compressed audio file that saves storage space compared to uncompressed AIFF or WAV while maintaining bit-perfect reproduction. This is ideal for archiving audio from video recordings where you want the highest possible quality in the smallest lossless package.
ALAC files integrate seamlessly into Apple Music libraries and iTunes, supporting full metadata (artist, album, artwork) that AAC and MP3 also support but without any lossy compression.
FFmpeg demuxes the MOV container, decodes the audio track to PCM, and re-encodes using the ALAC encoder into an M4A container (MPEG-4 with .m4a extension). If the MOV already contains ALAC audio, the stream is copied directly without transcoding. ALAC supports 16-bit to 32-bit depth and sample rates up to 384 kHz, covering all standard and high-resolution audio formats. Compression is typically 50-60% of the original PCM size.
ALAC is mathematically lossless — the decoded output is bit-identical to the original PCM samples. If the MOV source contains AAC (lossy), the ALAC output preserves the decoded AAC samples losslessly, but cannot restore quality lost during the original AAC encoding. From ALAC or PCM MOV sources, the extraction is completely transparent.
| Device | MOV | ALAC |
|---|---|---|
| Windows PC | Partial | Partial |
| macOS | Native | Native |
| iPhone/iPad | Native | 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
MOV to ALAC extraction is the best choice for lossless audio archival from Apple video sources, offering perfect quality with meaningful compression savings.
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| No |
| 特徴 | MOV | ALAC |
|---|---|---|
| 正式名称 | Apple QuickTime Movie | Apple Lossless Audio Codec |
| 拡張子 | .mov | .m4a |
| 最適な用途 | High quality | Lossless |