Video Conversion

Convert M4V to WMV: Free Online Converter

Convert MPEG-4 Video (Apple) to Windows Media Video online for free. Fast, secure video conversion with no watermarks or registration.

163,297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

M4V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

M4VからWMVへの変換について詳しく見る

M4V から WMV 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、.m4v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.wmvファイルをダウンロードしてください。

M4VからWMVへの変換について

M4V is Apple's MPEG-4 video format with optional FairPlay DRM, using H.264 and AAC codecs, while WMV (Windows Media Video) is Microsoft's proprietary video format using the Windows Media Video codec (variants 7, 8, and 9/VC-1). WMV was the dominant Windows video format through the 2000s and remains relevant for legacy Windows systems, PowerPoint presentations, and certain enterprise media workflows. Converting M4V to WMV bridges the Apple-to-Windows divide.

M4VをWMVに変換する理由

WMV is required by certain Windows-specific workflows. Microsoft PowerPoint (particularly older versions) embeds WMV more reliably than MP4. Some corporate intranet video systems, Windows-based digital signage solutions, and legacy media asset management systems still require WMV input. Additionally, WMV files can carry DRM through Windows Media DRM, which is relevant for enterprise content protection on Windows platforms.

主な活用例

Embedding Apple video content in PowerPoint presentations on Windows
Uploading to corporate intranet systems that only accept WMV format
Converting M4V files for Windows-based digital signage systems
Preparing video for legacy Windows Media Center or Xbox 360 media streaming
Creating WMV files for enterprise media asset management systems

仕組み

FFmpeg transcodes the M4V's H.264 video to WMV (using the msmpeg4v3 or wmv2 codec for compatibility, or wmv3/VC-1 for higher quality) and the AAC audio to WMA. The output is wrapped in ASF (Advanced Systems Format) container with a .wmv extension. VC-1 (WMV9) offers the best quality among WMV variants, approaching H.264 efficiency for standard-definition content but falling behind at HD resolutions.

品質とパフォーマンス

VC-1/WMV9 at equivalent bitrates produces quality roughly 80-90% of H.264 — slightly softer with more blocking artifacts in complex scenes. At SD resolutions (720x480), the difference is minimal. At 1080p, H.264 has a clear advantage. Typical WMV bitrates are 2-5 Mbps for acceptable quality.

Media EngineModerateMinimal Quality Loss

デバイス互換性

Device	M4V	WMV
Windows PC	Partial	Native
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 VC-1 (WMV9) codec for the best quality among WMV options
2For PowerPoint embedding, encode at 720p with 2-3 Mbps for the best balance of quality and file size
3If targeting very old Windows systems (XP era), use msmpeg4v3 or wmv2 for guaranteed compatibility
4WMV at 1080p requires high bitrates (5+ Mbps) to look acceptable — consider 720p instead for smaller files
5Test the WMV file in the target application (PowerPoint, media server, etc.) before batch-converting

M4VとWMVの比較

特徴	M4V	WMV
正式名称	iTunes Video	Windows Media Video
拡張子	.m4v	.wmv

よくある質問

WMV usage has declined significantly, but it remains relevant for PowerPoint presentations, some corporate systems, and legacy Windows installations.

Not natively since Apple removed Windows Media Components. VLC and other third-party players handle WMV on macOS.

WMV3 (VC-1) for best quality, or msmpeg4v3 for maximum compatibility with very old Windows systems. WMV2 is a middle ground.

Typically yes, by 20-40% at equivalent visual quality. VC-1/WMV9 is less efficient than H.264 for compression.

Older PowerPoint versions (2010 and earlier) embed WMV much more reliably. PowerPoint 2013 and later handle MP4 well, but WMV remains the safest choice for cross-version compatibility.

他の形式をWMVに変換

AVI to WMV F4V to WMV MKV to WMV MOV to WMV MPEG to WMV RM to WMV