Convert Audio Video Interleave (.avi) to Free Lossless Audio Codec (.flac) online for free. Fast, secure video conversion with no watermarks or registration.
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Choose your output settings. The default settings work great for most files.
Click Convert and download your .flac file when it's ready.
AVI's RIFF structure commonly wraps audio encoded as uncompressed PCM (16/24-bit), MPEG Layer 3 (MP3), or Dolby AC3. FLAC (Free Lossless Audio Codec) is the open-source standard for lossless audio compression, achieving 50–70% size reduction compared to raw PCM while guaranteeing bit-perfect reconstruction. Converting AVI to FLAC extracts the audio track and compresses it losslessly, producing a standalone audio file widely supported on Linux, Android, Windows, and most modern audio equipment.
FLAC is the preferred lossless format for audiophiles, music archivists, and open-source enthusiasts. When extracting audio from AVI files — live recordings, music videos, or film audio — FLAC preserves every detail while being roughly half the size of the equivalent WAV or AIFF. Unlike ALAC (Apple-only ecosystem), FLAC enjoys universal support across platforms, media servers (Plex, Jellyfin), and high-fidelity audio players (foobar2000, DeaDBeeF, Roon).
FFmpeg demuxes the AVI container, decodes the audio stream to PCM, and re-encodes to FLAC at the selected compression level (0–8, where 8 is maximum compression at the cost of encoding speed). FLAC compression is always lossless regardless of level — only encoding time and file size differ. The output preserves the original sample rate (44.1/48/96 kHz), bit depth (16/24-bit), and channel count. FLAC also supports embedded cover art, Vorbis comments, and cue sheet metadata.
FLAC is mathematically lossless — decoded audio is identical to the input PCM at the bit level. If the AVI audio is already lossy (MP3, AC3), converting to FLAC freezes it at the decoded quality without adding any further degradation, but will not restore detail lost in the original compression.
| Device | AVI | FLAC |
|---|---|---|
| Windows PC | Native | Partial |
| macOS | Partial | Partial |
| iPhone/iPad | Partial | Partial |
| Android | Partial | Native |
| Linux | Partial | Native |
| 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
AVI to FLAC conversion is the gold standard for extracting lossless audio from video files. FLAC's open-source nature, universal compatibility, and efficient compression make it the ideal archival and playback format.
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Funguje všude
| No |
8MB free, 50MB Nitro
Jakýkoli prohlížeč, jakékoli zařízení
| Vlastnost | AVI | FLAC |
|---|---|---|
| Celý název | Audio Video Interleave | Free Lossless Audio Codec |
| Přípona | .avi | .flac |
| Nejlepší pro | Windows native | Lossless compression |