Convert FLV to AIFF: Free Online Converter
Convert Flash Video to Audio Interchange File Format online for free. Fast, secure video conversion with no watermarks or registration.
FLVに対応
アップロードすることで、これらのファイルの権利を有していること、および利用規約に同意することを確認したものとみなされます。
変換設定: ファイルを追加すると調整できます
安全な転送
HTTPS暗号化アップロード
プライバシー優先
ゲストのファイルは約2時間で自動削除
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
FLV から AIFF への設定
- エンジン
- メディア
- 設定
- 調整できる設定: 11
- Trim Start
- Trim End
- Volume
- Fade In
- Fade Out
- Sample Rate
- Bit Depth
- Channels
- Audio Channels
- Reverse Audio
- Strip Metadata
変換方法
アップロードエリアにドラッグするか、クリックして選択し、.flvファイルをアップロードしてください。
必要に応じて出力設定を調整してください。デフォルト設定ではオリジナルの品質を維持します。
「変換」をクリックし、準備ができたら.aiffファイルをダウンロードしてください。
FLVからAIFFへの変換について
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.
FLVをAIFFに変換する理由
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.
主な活用例
- Importing audio from FLV concert recordings into Logic Pro or GarageBand for mixing and mastering
- Extracting voice-over tracks from Flash-era training videos for reuse in professional productions
- Creating high-quality sound effects libraries from FLV game recordings in Apple-native format
- Preparing audio stems from FLV sources for CD mastering workflows that require uncompressed PCM
- Archiving FLV podcast episodes as lossless AIFF files for long-term preservation
仕組み
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).
品質とパフォーマンス
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.
デバイス互換性
| Device | FLV | AIFF |
|---|---|---|
| Windows PC | Partial | Partial |
| macOS | Partial | Partial |
| iPhone/iPad | Partial | Partial |
| Android | Partial | Partial |
| Linux | Partial | Partial |
| Web Browser | No | No |
プラットフォーム別の推奨設定
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
最良の結果を得るためのヒント
- 1Choose 24-bit output instead of 16-bit if you plan to apply significant effects processing — the extra headroom prevents clipping during mixing
- 2Match the output sample rate to your DAW project setting (typically 44.1 kHz for music or 48 kHz for video post) to avoid unnecessary resampling
- 3Preview the audio in the FLV before converting to verify the content is what you need — it saves time with large files
- 4Use AIFF for your working master and export to AAC or MP3 only as a final delivery step
- 5Label converted AIFF files with descriptive names immediately — uncompressed files all look the same size in a file browser
関連する変換
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.
FLVとAIFFの比較
| 特徴 | FLV | AIFF |
|---|---|---|
| 正式名称 | Flash Video | Audio Interchange File Format |
| 拡張子 | .flv | .aiff |