Convert WMV to AIF — Free Online Tool
Convert WMV video files to AIF audio by extracting the compressed WMA audio track and re-encoding it as uncompressed PCM — perfect for pulling high-fidelity audio from Windows Media Video files into a format compatible with Apple's professional audio ecosystem.
to
FFmpeg Command
Copy this command to run the same conversion locally with FFmpeg on your desktop. Download FFmpeg
Drop your WMV file here
or click to browse
Free — no uploads, no signups. Your files never leave your browser.
Settings
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
WMV files typically contain audio encoded with the WMA v2 (wmav2) codec, a lossy compressed format developed by Microsoft. During this conversion, FFmpeg discards the video stream entirely and decodes the compressed WMA audio back to raw PCM samples, then re-encodes them as 16-bit big-endian PCM (pcm_s16be) inside an AIF container. Because WMA is a lossy format, this is a lossy-to-lossless conversion — the AIF output will be uncompressed and much larger than the source audio, but it cannot recover audio detail that was lost when the WMV was originally encoded. The result is a clean, uncompressed AIF file ready for use in Logic Pro, GarageBand, Pro Tools, or any other professional audio application that reads AIFF.
What Each Flag Does
| Flag | What it does |
|---|---|
ffmpeg
|
Invokes the FFmpeg program — the open-source multimedia processing engine that powers this conversion both in the browser (via FFmpeg.wasm) and on the desktop command line. |
-i input.wmv
|
Specifies the input file — a WMV file using the ASF container, typically containing an msmpeg4 video stream and a wmav2 (WMA) compressed audio stream. |
-c:a pcm_s16be
|
Sets the audio codec for the output to 16-bit signed big-endian PCM, which is the standard uncompressed audio encoding used in AIF files on Apple systems. This decodes the lossy WMA audio from the WMV and re-encodes it as raw, uncompressed samples in the AIFF-native byte order. |
output.aif
|
Defines the output filename and tells FFmpeg to write an AIFF container. FFmpeg infers the format from the .aif extension, wrapping the pcm_s16be audio stream in an Apple Audio Interchange File Format container compatible with macOS applications like Logic Pro, GarageBand, and QuickTime. |
Common Use Cases
- Extracting narration or voiceover audio from a Windows Media Video presentation to import into a Mac-based audio editing workflow in Logic Pro or GarageBand
- Pulling a music track or soundtrack from a WMV file and converting it to AIF for use as a sample or loop in a DAW that requires uncompressed audio
- Archiving the audio content of legacy WMV recordings in an uncompressed format so no further generational quality loss occurs in future edits
- Preparing audio from WMV corporate training or webinar recordings for re-use in podcast production on macOS, where AIF is a native and preferred format
- Extracting audio from WMV screen recordings made on Windows and converting to AIF for import into Final Cut Pro or DaVinci Resolve on a Mac
Frequently Asked Questions
No — the audio in a WMV file is typically encoded with the lossy WMA v2 codec, which permanently discards audio information during the original encoding. Converting to AIF produces an uncompressed file, but it cannot restore the detail that was already lost. What you gain is a lossless container that prevents any further quality degradation in subsequent edits or re-exports.
WMV stores audio using the lossy WMA codec, which achieves significant compression — often at bitrates of 64k to 192k. AIF with pcm_s16be stores every audio sample as raw uncompressed 16-bit data, typically at 1411 kbps for stereo CD-quality audio. A 10-minute WMV with 128k audio might yield an AIF file ten times larger. The video stream is also dropped entirely, but the audio expansion alone accounts for most of the size difference.
The video stream is dropped completely. AIF is a pure audio format with no support for video, so FFmpeg extracts only the audio track. No video data is preserved in the output. If you need to keep the video, this is not the right conversion — you would need a video output format instead.
Replace pcm_s16be with pcm_s24be in the command: ffmpeg -i input.wmv -c:a pcm_s24be output.aif. This encodes audio as 24-bit big-endian PCM, which is common in professional audio production and supported by Logic Pro and Pro Tools. Other valid options include pcm_s32be for 32-bit integer and pcm_f32be for 32-bit float. Note that since the WMV source is lossy, the extra bit depth won't recover lost detail but may be required for compatibility with specific studio workflows.
Yes, on the command line you can use a shell loop to process multiple files. On Linux or macOS: for f in *.wmv; do ffmpeg -i "$f" -c:a pcm_s16be "${f%.wmv}.aif"; done. On Windows PowerShell: Get-ChildItem *.wmv | ForEach-Object { ffmpeg -i $_.FullName -c:a pcm_s16be ($_.BaseName + '.aif') }. The browser-based tool processes one file at a time, so the command-line approach is recommended for batch jobs.
Metadata handling differs significantly between ASF (the WMV container) and AIFF. FFmpeg will attempt to map common metadata fields such as title, artist, and comment, but the ASF container uses Windows Media metadata attributes that do not always have direct AIFF equivalents. Some tags may be lost or appear differently. If precise metadata is important, verify the output in a tag editor like Kid3 or MusicBrainz Picard after conversion.
Technical Notes
WMV files use the ASF (Advanced Systems Format) container — the same format used by WMA audio files — and require the -f asf flag when writing, though reading them is handled automatically by FFmpeg. The audio codec in most WMV files is WMA v2 (wmav2), a Microsoft proprietary lossy codec roughly comparable in quality to MP3 at equivalent bitrates. The AIF format uses a big-endian byte order for PCM samples, which reflects its Apple and Motorola heritage; this is distinct from WAV, which uses little-endian PCM. The default codec chosen here, pcm_s16be, produces 16-bit signed big-endian audio suitable for CD-quality output and broad compatibility with macOS applications. If the source WMV contains multiple audio tracks, only the first audio track will be extracted by default — use the -map flag to select a specific track. WMV files with DRM (Digital Rights Management) protection cannot be converted by FFmpeg or any other tool without the appropriate license key; FFmpeg will report an error if it encounters an encrypted stream.