Video Conversion

Convert MOV to FLV: Free Online Converter

Convert QuickTime Movie to Flash Video online for free. Fast, secure video conversion with no watermarks or registration.

163,370件のファイルを変換済み

ファイルを選択

またはページ内の任意の場所にドラッグ＆ドロップ

MOV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。

転送時に暗号化

変換設定: ファイルを追加すると調整できます

Trim Start

Format: HH:MM:SS (leave empty to start from beginning)

Trim End

Format: HH:MM:SS (leave empty to keep until end)

Volume

0100%200

0% = silent, 100% = original, 200% = double loudness

Audio Fade In

00s10

Gradually fade the audio track in over this many seconds

Audio Fade Out

00s10

Gradually fade the audio track out over the final seconds

Audio codec

Keep original audio cannot be combined with volume, fades, bitrate or sample rate.

Audio bitrate

Audio sample rate

Remove audio

Makes a silent video.

Quality

Resolution

Frame Rate

Resize Mode

Audio Channels

Crop X

Horizontal offset (px) from left edge

Crop Y

Vertical offset (px) from top edge

Crop Width

Width of crop area (px). 0 = no crop

Crop Height

Height of crop area (px). 0 = no crop

Rotate

Flip horizontally

Flip vertically

Strip Metadata

Remove EXIF data, GPS, camera info

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

変換成功率をリアルタイムで見る

MOVからFLVへの変換について詳しく見る

MOV から FLV への設定

エンジン

メディア

設定

調整できる設定: 22

Trim Start
Trim End
Volume
Audio Fade In
Audio Fade Out
Quality
Resolution
Frame Rate
Resize Mode
Audio Channels
Crop X
Crop Y

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、.mov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.flvファイルをダウンロードしてください。

MOVからFLVへの変換について

MOV from Apple's QuickTime ecosystem uses modern codecs like H.264 and HEVC within a sophisticated atom-based container. FLV (Flash Video) was the dominant web video format from 2005 to 2015, used by YouTube, Twitch, and millions of Flash-embedded websites. FLV wraps Sorenson Spark (H.263), VP6, or H.264 video with MP3, AAC, or Speex audio inside Adobe's proprietary container.

MOVをFLVに変換する理由

Despite Flash Player reaching end-of-life in December 2020, FLV remains relevant for legacy content management systems, streaming servers running older versions of Adobe Media Server or Wowza, and archival workflows that require FLV format. Some RTMP-based live streaming setups still accept FLV input for ingest.

Converting MOV to FLV is also needed when working with Flash-based educational platforms and interactive training systems that have not been migrated to HTML5.

主な活用例

Preparing iPhone video for upload to legacy content management systems that only accept FLV
Creating FLV content for RTMP live streaming ingest servers that require Flash Video input
Converting QuickTime recordings for Flash-based e-learning platforms still in operation
Archiving MOV content in FLV format for compatibility with historical video libraries
Producing FLV files from MOV sources for integration with older Wowza or Red5 streaming servers

仕組み

FFmpeg remuxes or transcodes MOV content into the FLV container. When the source MOV contains H.264 video and AAC audio, these can be directly placed into FLV without re-encoding since FLV supports both codecs. HEVC must be transcoded to H.264 as FLV has no HEVC support. Audio must be AAC, MP3, or Speex — other codecs are transcoded. FLV uses a simple tag-based structure with script, audio, and video tags marked by timestamps.

品質とパフォーマンス

When H.264 and AAC streams are copied from MOV to FLV, quality is preserved exactly. HEVC-to-H.264 transcoding introduces a single generation of re-encoding. FLV supports up to 1080p resolution but lacks support for HDR, 4K, and modern metadata — these features are lost during conversion.

Media EngineModerateMinimal Quality Loss

デバイス互換性

Device	MOV	FLV
Windows PC	Partial	Partial
macOS	Native	Partial
iPhone/iPad	Native	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

Instagram

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 stream copy mode when the MOV contains H.264 + AAC for zero quality loss and instant conversion
2Downscale to 720p or 1080p — FLV players and servers rarely handle higher resolutions properly
3If the target system requires VP6 or Sorenson Spark codec, specify it explicitly as these are the classic FLV codecs
4Add proper FLV metadata (duration, width, height, framerate) using the -flvflags add_keyframe_index option
5Test the FLV output with VLC before deploying to production streaming servers

MOVとFLVの比較

特徴	MOV	FLV
正式名称	Apple QuickTime Movie	Flash Video
拡張子	.mov	.flv

よくある質問

Yes. FLV supports H.264 video and AAC audio — the same codecs used in most MOV files. When these match, the conversion is a fast remux with zero quality loss.

Legacy systems. Many enterprise streaming servers, educational platforms, and content management systems built during the Flash era still require FLV input and have not been migrated.

FLV technically has no resolution limit, but the format was designed for web delivery at 480p-1080p. Most FLV players and servers do not handle 4K well. Downscale to 1080p.

Yes. FLV is the native container for RTMP streaming. The converted file can be ingested by RTMP servers like Nginx-RTMP, Wowza, or legacy Adobe Media Server.

Not natively — Flash Player was removed from all browsers in 2021. FLV requires standalone players like VLC, PotPlayer, or the Ruffle Flash emulator for web playback.

他の形式をFLVに変換

AVI to FLV TS to FLV