Convert QT to FLV — Free Online Converter
Convert QuickTime (.qt) to Flash Video (.flv) online for free. Fast, secure video conversion with no watermarks or registration.
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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
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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
変換方法
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 .flv file when it's ready.
MOVからFLVへの変換について
FLV (Flash Video) was the dominant web video format from 2005-2012, powering early YouTube, Vimeo, and countless Flash-based video players. It uses the Sorenson Spark (H.263) or VP6 video codec with MP3 or AAC audio inside Adobe's proprietary container. While Flash Player was officially discontinued in 2020, FLV files remain common in legacy content management systems and older web platforms that haven't been updated.
MOVをFLVに変換する理由
Converting QT to FLV is primarily needed for legacy system compatibility. Some older CMS platforms, e-learning systems, and enterprise intranets still use Flash-based video players that only accept FLV input. The format is also used in certain Chinese video platforms and archival systems where upgrading infrastructure is impractical.
主な活用例
- Uploading QT content to legacy e-learning platforms that only accept FLV
- Preparing QT videos for embedded Flash players in enterprise intranets
- Converting QT recordings for archival in systems built around FLV workflows
- Delivering QT content to legacy RTMP streaming servers
- Creating FLV files from QT sources for compatibility with older Chinese video portals
仕組み
FFmpeg converts the QT video stream to H.264 (or VP6 for maximum Flash compatibility) and audio to AAC or MP3. The output is muxed into the FLV container with proper FLV tag headers and timestamps. H.264 in FLV is supported by Flash Player 9.0.115+ but not by all standalone FLV players.
品質とパフォーマンス
FLV with H.264 video and AAC audio matches the quality of any other H.264 container at equivalent bitrates. VP6 or Sorenson Spark codecs produce noticeably lower quality but ensure compatibility with very old Flash Player versions. Typical web quality targets are 500-2000 kbps video bitrate.
デバイス互換性
| Device | MOV | FLV |
|---|---|---|
| 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
- 1Use H.264 Baseline Profile with AAC audio for the best FLV quality — only fall back to VP6/Sorenson if targeting very old Flash Player versions.
- 2Set keyframe interval to 2 seconds for smooth seeking in Flash-based players, which rely on keyframes for seek points.
- 3If your legacy platform supports it, deliver MP4 via a JavaScript player (like Video.js) instead of FLV — it's a better long-term path.
- 4Keep FLV files under 100 MB for reliable upload to most legacy CMS platforms, which were designed for smaller web videos.
関連する変換
QT to FLV conversion serves niche legacy needs where Flash-era infrastructure persists. For any new project, MP4 or WebM are strongly preferred. Use this conversion only when your delivery system specifically requires FLV input.
MOVとFLVの比較
| 特徴 | MOV | FLV |
|---|---|---|
| 正式名称 | Apple QuickTime Movie | Flash Video |
| 拡張子 | .mov | .flv |
| 最適な用途 | High quality | Small file size |