Convert MOV to WMA — Free Online Tool
Convert MOV files to WMA by extracting and re-encoding the audio track using the Windows Media Audio v2 codec. This is ideal when you need audio-only output from QuickTime footage in a format natively supported by Windows Media Player and Microsoft ecosystem applications.
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FFmpeg Command
Copy this command to run the same conversion locally with FFmpeg on your desktop. Download FFmpeg
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Note: Browser-based encoding uses approximate quality targets. For precise CRF compression, copy the FFmpeg command above and run it on your desktop.
Estimated output:
Conversion Complete!
DownloadHow It Works
MOV is a container that can hold video, audio, subtitles, and chapter data — but WMA is a pure audio format with no video container support. During this conversion, FFmpeg discards the video stream entirely and extracts only the audio track from the MOV file. That audio — which is typically AAC or PCM inside the MOV — is then transcoded (re-encoded) into the WMA v2 (wmav2) codec at 128k bitrate by default. This is not a lossless copy operation: the audio is decoded from its original codec and re-encoded into WMA, which is a lossy format. Any non-audio data in the MOV file — video, subtitles, chapter markers, and additional audio tracks — is dropped, since the WMA container supports none of these features.
What Each Flag Does
| Flag | What it does |
|---|---|
ffmpeg
|
Invokes the FFmpeg command-line tool. In the browser-based version of this tool, FFmpeg runs locally via WebAssembly (FFmpeg.wasm), so no file is ever uploaded to a server. |
-i input.mov
|
Specifies the input file — your QuickTime MOV file. FFmpeg reads all streams from this container, including video, audio, subtitles, and chapters, though only the audio stream will be used in the WMA output. |
-c:a wmav2
|
Sets the audio encoder to Windows Media Audio v2 (wmav2), Microsoft's standard lossy audio codec and the required codec for WMA output. This triggers a full re-encode of the MOV's audio — whether it was AAC, PCM, or another codec — into the WMA format. |
-b:a 128k
|
Sets the audio bitrate to 128 kilobits per second for the WMA output. This is a reasonable default for speech and general audio; increase to 192k or 256k for music or higher-fidelity content to reduce compression artifacts introduced by the WMA v2 encoder. |
output.wma
|
Defines the output filename with the .wma extension. The WMA extension signals FFmpeg to use the ASF (Advanced Systems Format) container, which is the standard wrapper for Windows Media Audio files and is required for compatibility with Windows Media Player and other WMA-supporting applications. |
Common Use Cases
- Extracting interview or voiceover audio from a MOV recording to distribute as a WMA file for playback in Windows Media Player or older Windows-based media systems
- Converting Apple QuickTime audio recordings to WMA for use in Windows-native multimedia projects or legacy corporate training software that requires WMA input
- Stripping audio from MOV screen recordings or presentations to create standalone audio files compatible with Microsoft SharePoint or older Windows intranet media players
- Preparing audio content from Final Cut Pro exports (MOV) in WMA format for digital distribution platforms or digital rights management (DRM) workflows on Windows
- Archiving audio commentary or narration tracks from MOV video files into WMA format for use in Windows-based e-learning authoring tools like older versions of Articulate or Adobe Captivate
Frequently Asked Questions
Yes, some quality loss is expected because this conversion involves two lossy encoding steps if the MOV's audio is already compressed (e.g., AAC). The audio is first decoded from its original codec, then re-encoded into WMA v2 — a process called transcoding. At the default 128k bitrate, the result is generally acceptable for speech and voice content, but audiophiles or music producers may prefer a higher bitrate like 256k or 320k to minimize generational loss.
All of them are permanently discarded. The WMA format is audio-only and has no support for video streams, subtitle tracks, chapter markers, or multiple audio tracks. Only the first (or primary) audio track from the MOV is extracted and encoded. If your MOV contains multiple audio tracks — common in professional editing workflows — only the default audio stream will be included in the WMA output.
Unfortunately, no. WMA files must use a Windows Media Audio codec (wmav2 or wmav1), so AAC audio from a MOV cannot be stream-copied into a WMA container. Re-encoding is mandatory for this format pair. If preserving audio quality without re-encoding is a priority, consider converting to formats that can carry AAC natively, such as M4A or MP4.
Replace the '-b:a 128k' value with a higher bitrate. For example, use '-b:a 256k' or '-b:a 320k' for higher quality output: 'ffmpeg -i input.mov -c:a wmav2 -b:a 256k output.wma'. WMA v2 supports bitrates from 64k up to 320k. For voice recordings, 128k is usually sufficient; for music, 192k or higher is recommended to reduce audible compression artifacts.
Yes, by replacing '-c:a wmav2' with '-c:a wmav1' in the command. WMA v1 is an older codec with slightly lower efficiency, meaning it produces marginally lower audio quality at the same bitrate compared to wmav2. WMA v2 is the default and recommended choice for virtually all modern use cases, but wmav1 may be necessary for compatibility with very old Windows Media Player versions or legacy embedded hardware.
Yes. On Linux or macOS, you can use a shell loop: 'for f in *.mov; do ffmpeg -i "$f" -c:a wmav2 -b:a 128k "${f%.mov}.wma"; done'. On Windows Command Prompt, use: 'for %f in (*.mov) do ffmpeg -i "%f" -c:a wmav2 -b:a 128k "%~nf.wma"'. The browser-based tool processes one file at a time, so the FFmpeg command is especially useful when you need to batch process a folder of MOV files locally.
Technical Notes
WMA (Windows Media Audio) uses Microsoft's proprietary wmav2 codec, which is a transform-based lossy codec broadly comparable in design to AAC and MP3. Since MOV files most commonly carry AAC or PCM audio internally, this conversion always requires full transcoding — there is no stream-copy path available. Metadata preservation is partial: basic ID3-style tags such as title, artist, and album may carry over depending on what is embedded in the MOV, but QuickTime-specific metadata atoms that have no WMA equivalent will be lost. The WMA container also has no support for transparency, video, subtitles, chapters, or multiple audio tracks — all features that MOV natively supports. Users working in professional audio contexts should be aware that WMA is a lossy, proprietary format with limited cross-platform support outside of the Windows and Microsoft ecosystem; open formats like FLAC or Opus may be more suitable for archival or cross-platform distribution. For DRM-protected WMA output, additional tooling beyond standard FFmpeg is required, as FFmpeg itself does not apply WMA DRM.