Convert Flash Video (.flv) to Audio Interchange File Format (.aiff) 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 .aiff file when it's ready.
FLV (Flash Video) stores audio as compressed MP3, AAC, or Nellymoser within Adobe's streaming container. AIFF (Audio Interchange File Format) is Apple's uncompressed PCM audio standard, storing raw waveform data at full CD quality (16-bit/44.1 kHz) or higher. Developed by Apple in 1988 based on the IFF format from Electronic Arts, AIFF is the Mac equivalent of WAV and is the preferred import format for professional DAWs like Logic Pro, Pro Tools, and GarageBand. Converting FLV to AIFF gives you lossless, editor-friendly audio from legacy Flash content.
Professional audio workflows on macOS rely on AIFF as the native uncompressed format. If you have FLV recordings containing music, voice-overs, or sound effects, converting to AIFF provides a lossless working copy that can be edited, processed, and mixed without introducing additional compression artifacts. AIFF also supports metadata chunks for loop points and instrument definitions used in music production.
FFmpeg extracts the audio stream from the FLV container, decodes MP3/AAC/Nellymoser to PCM, and writes uncompressed big-endian PCM data into the AIFF container. The default output is 16-bit signed integer at the source sample rate (typically 44.1 kHz). 24-bit and 32-bit float options are available for higher dynamic range. AIFF uses IFF-style chunks (COMM for format info, SSND for audio data, MARK for cue points).
The AIFF output faithfully captures every sample from the decoded audio — there is no additional quality loss beyond what the original FLV compression introduced. Since AIFF is uncompressed, the file will be roughly 10x larger than the compressed source. The quality ceiling is limited by the FLV's original encoding — a 128 kbps MP3 in an FLV will sound like 128 kbps MP3 even in AIFF, but no further degradation occurs.
| Device | FLV | AIFF |
|---|---|---|
| Windows PC | Partial | Partial |
| macOS | Partial | Partial |
| iPhone/iPad | Partial | Partial |
| 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
FLV to AIFF conversion is the bridge between legacy Flash audio and professional Mac-based production. The uncompressed output ensures maximum editing flexibility while the Apple-native format guarantees seamless integration with macOS audio tools.
安全な転送
HTTPS暗号化アップロード
プライバシー優先
処理後にファイルを自動削除
登録不要
すぐに変換を開始
どこでも動作
あらゆるブラウザ、あらゆるデバイス
| No |
| 特徴 | FLV | AIFF |
|---|---|---|
| 正式名称 | Flash Video | Audio Interchange File Format |
| 拡張子 | .flv | .aiff |
| 最適な用途 | Small file size | Lossless quality |