Convert QT to FLAC — Free Online Converter
Convert QuickTime (.qt) to Free Lossless Audio Codec (.flac) online for free. Fast, secure video conversion with no watermarks or registration....
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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 .flac file when it's ready.
About MOV to FLAC Conversion
FLAC (Free Lossless Audio Codec) is an open-source lossless compression format developed by the Xiph.Org Foundation. It typically compresses audio to 50-70% of the original PCM size while allowing perfect bit-for-bit reconstruction. Extracting audio from Apple's QuickTime container into FLAC preserves every detail of the original recording in the most widely supported open lossless format available.
Why Convert MOV to FLAC?
QT files bundle video data you may not need with audio data you do. FLAC is the universal lossless standard — supported on Android, Linux, Windows (via native codec in Windows 10+), and all major media players. Unlike Apple's proprietary ALAC, FLAC is open-source and has the broadest cross-platform support of any lossless audio format.
Common Use Cases
- Extracting master audio from QT concert recordings for lossless music archival
- Pulling studio-quality audio from QT video projects for independent distribution
- Creating lossless audio backups of important QT multimedia files for long-term storage
- Preparing reference audio from QT sources for cross-platform music production
- Archiving oral history recordings from QuickTime format into an open standard
How It Works
FFmpeg decodes the QT audio stream and passes the raw PCM data to the FLAC encoder, which uses linear prediction and entropy coding to achieve lossless compression. The compression level (0-12) controls encoding speed versus file size — level 5 is the default, offering a good balance. Metadata including title, artist, and album are mapped to Vorbis Comment tags in the FLAC output.
Quality & Performance
FLAC is mathematically lossless — the decoded audio is identical bit-for-bit to the encoder input. If the QT source contains lossy audio (AAC, MP3), the FLAC output preserves exactly that quality level. There is no generation loss from the conversion process itself.
Device Compatibility
| Device | MOV | FLAC |
|---|---|---|
| Windows PC | Partial | Partial |
| macOS | Partial | Partial |
| iPhone/iPad | Partial | Partial |
| Android | Partial | Native |
| Linux | Partial | Native |
| Web Browser | No | No |
Recommended Settings by Platform
YouTube
Resolution: 1920x1080
Bitrate: 8-12 Mbps
H.264 recommended for fast processing
Resolution: 1080x1080
Bitrate: 3.5 Mbps
Square or 9:16 for Reels
TikTok
Resolution: 1080x1920
Bitrate: 4 Mbps
9:16 vertical, under 60s ideal
Twitter/X
Resolution: 1280x720
Bitrate: 5 Mbps
Under 140s, 512MB max
Resolution: 960x540
Bitrate: 2 Mbps
16MB limit for standard, 64MB for document
Discord
Resolution: 1280x720
Bitrate: 4 Mbps
8MB free, 50MB Nitro
Tips for Best Results
- 1Use FLAC compression level 5 (default) for the best speed/size balance — levels 6-12 save only 1-2% more space at significantly slower encoding.
- 2Verify your QT source audio quality before converting — lossless FLAC encoding of low-bitrate AAC audio just wastes disk space without quality benefit.
- 3Add ReplayGain tags to your FLAC files after conversion for consistent playback volume across tracks.
- 4Use FLAC for archival and transcode to AAC or MP3 for portable devices — this preserves a master copy while serving mobile needs.
Related Conversions
QT to FLAC conversion liberates your audio from Apple's proprietary container into the most widely supported open lossless format. It's the gold standard for archival, cross-platform distribution, and professional audio workflows where quality cannot be compromised.