Video Conversion

Convert RM to WMV: Free Online Converter

Convert RealMedia 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

RM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

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

RMからWMVへの変換について詳しく見る

RM から WMV への設定

エンジン: メディア
設定: 設定は不要です。適切な初期値が使われます。

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、.rm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。

RMからWMVへの変換について

WMV (Windows Media Video) is Microsoft's proprietary video format, using the VC-1 or WMV9 codec in an ASF container. Introduced in the late 1990s as a competitor to RealVideo, WMV became the default video format for Windows through deep integration with Windows Media Player and Windows Movie Maker. RM (RealMedia) served the same market role for RealNetworks: both competed to be the dominant internet video format before MP4 won the entire market.

Converting RM to WMV moves video from one late-1990s proprietary format to another. While both are legacy formats, WMV has one critical advantage: native Windows support. Every Windows PC from XP through 11 plays WMV without additional codecs, while RM requires a separate (now-abandoned) RealPlayer installation.

RMをWMVに変換する理由

Windows Media Player plays WMV natively on every Windows installation. No codecs, plugins, or third-party software needed. In enterprise environments where installing software is restricted, WMV is the only guaranteed video format. RM, by contrast, requires RealPlayer — an application that is no longer maintained and may pose security risks on modern systems.

WMV is also supported by older Xbox consoles, Windows Phone devices, and some non-smart TVs from the 2000s-2010s. For Windows-centric environments with legacy hardware, WMV provides the widest compatibility. For modern multi-platform use, MP4 is a better choice — but WMV fills the Windows-only niche that RM once competed for.

主な活用例

Migrating RM video archives for playback on Windows corporate desktops with locked-down software policies
Converting RM training videos for legacy Windows-based presentation systems
Preparing RM content for older Xbox consoles and Windows media devices that support WMV natively
Creating Windows-compatible video from RM sources for Windows Movie Maker editing projects
Converting RM video for Windows Media Center and DLNA streaming in home theater setups

仕組み

FFmpeg decodes RealVideo (RV10/RV20/RV30) and RealAudio (Cook) from the RM container. Video is re-encoded using WMV2 (Windows Media Video 8) or WMV3 (Windows Media Video 9/VC-1) codec at a bitrate matching or exceeding the original RM quality. Audio is encoded to WMA v2 at 128 kbps. The ASF container wraps both streams with Windows Media metadata and index for seeking. WMV3 (VC-1) offers significantly better compression than WMV2 but requires Windows XP SP2 or later.

品質とパフォーマンス

WMV9 (VC-1) is considerably more efficient than RealVideo RV10/RV20, so the WMV output can match RM source quality at lower file sizes. However, RM files were encoded at 100-500 kbps for dial-up delivery — the source quality is inherently poor with low resolution, low frame rate, and heavy compression artifacts. WMV conversion preserves this quality faithfully. The only improvement is format compatibility, not visual fidelity.

Media EngineModerateMinimal Quality Loss

デバイス互換性

Device	RM	WMV
Windows PC	Partial	Native
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

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 WMV3 (VC-1/WMV9) for the best quality — it is significantly better than WMV2 and supported on all Windows versions since XP SP2.
2Unless you specifically need Windows-native playback, convert RM to MP4 instead — MP4 is universally compatible while WMV is Windows-only.
3Keep the original RM resolution — do not upscale 176x144 or 320x240 content. Windows Media Player handles display scaling well.
4Set a reasonable bitrate target (500-1000 kbps) — RM source content is low quality and higher bitrates just waste space without visible improvement.
5Test the WMV output on the target Windows system before batch converting — WMV codec version support varies between Windows editions.

RMとWMVの比較

特徴	RM	WMV
正式名称	RealMedia	Windows Media Video
拡張子	.rm	.wmv

よくある質問

Not natively — macOS dropped WMV support years ago. VLC plays WMV on macOS, but if cross-platform compatibility matters, convert to MP4 instead of WMV.

WMV3 (VC-1/WMV9) offers the best quality and is supported on Windows XP SP2 and later. Use WMV2 only if targeting very old Windows systems (pre-XP SP2).

WMV9 (VC-1) is significantly more efficient than RealVideo RV10/RV20. At equivalent bitrates, WMV9 produces noticeably better visual quality. However, since the RM source was already heavily compressed, the improvement from the conversion is modest.

Yes — Windows Movie Maker natively imports WMV files. This was Microsoft's recommended format for home video editing throughout the Windows XP and Vista era.

Yes — FFmpeg maps RM timestamps to the WMV timeline accurately. Duration, keyframes, and seeking positions are preserved in the ASF container's index.

他の形式をWMVに変換

AVI to WMV F4V to WMV M4V to WMV MKV to WMV MOV to WMV MPEG to WMV