Convert Flash Video (.f4v) to Windows Media Audio (.wma) online for free. Fast, secure video conversion with no watermarks or registration.
Conversion settings — add a file to adjust
Upload your .f4v file by dragging it into the upload area or clicking to browse.
Choose your output settings. The default settings work great for most files.
Click Convert and download your .wma file when it's ready.
F4V stores H.264 video and AAC audio in Adobe's Flash MPEG-4 container. WMA (Windows Media Audio) is Microsoft's proprietary audio codec, part of the Windows Media framework. WMA was designed to compete with MP3 at lower bitrates, offering better quality than MP3 below 128 kbps. Converting F4V to WMA extracts audio from Flash video and encodes it in Microsoft's native audio format.
WMA remains relevant in legacy Windows environments — older Windows Media Player versions, Zune devices, some car stereos, and Windows CE/Embedded systems that predate AAC support. Converting F4V to WMA is appropriate when your target playback system specifically requires WMA format. WMA also integrates with Windows Media DRM if content protection is needed within a Microsoft enterprise environment.
FFmpeg decodes the AAC audio from the F4V container and re-encodes it using the WMA v2 encoder (wmav2). WMA v2 supports bitrates from 32 to 320 kbps in CBR mode and has a VBR mode. The output uses the ASF (Advanced Systems Format) container, which is Microsoft's standard wrapper for WMA and WMV streams. WMA supports sample rates up to 48 kHz in stereo.
WMA v2 at 128-192 kbps delivers quality comparable to MP3 at the same bitrate. Below 128 kbps, WMA performs slightly better than MP3 but worse than AAC. At matched bitrates, the quality difference between the original AAC and the WMA output is typically inaudible for most listeners. WMA Professional and WMA Lossless variants exist but are less commonly supported.
| Device | F4V | WMA |
|---|---|---|
| Windows PC | Partial | Native |
| macOS | Partial | Partial |
| iPhone/iPad | Partial | Partial |
| Android | Partial | Partial |
| Linux | Partial | Partial |
| Web Browser | No |
Resolution: 1920x1080
Bitrate: 8-12 Mbps
H.264 recommended for fast processing
Resolution: 1080x1080
Bitrate: 3.5 Mbps
Square or 9:16 for Reels
Resolution: 1080x1920
Bitrate: 4 Mbps
9:16 vertical, under 60s ideal
Resolution: 1280x720
Bitrate: 5 Mbps
Under 140s, 512MB max
Resolution: 960x540
Bitrate: 2 Mbps
16MB limit for standard, 64MB for document
Resolution: 1280x720
Bitrate: 4 Mbps
8MB free, 50MB Nitro
F4V to WMA conversion is a niche operation for legacy Microsoft ecosystems. Unless you specifically need WMA for hardware or software compatibility, AAC or MP3 are better universal choices.
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| No |
| 特徴 | F4V | WMA |
|---|---|---|
| 正式名称 | Flash MP4 Video | Windows Media Audio |
| 拡張子 | .f4v | .wma |
| 最適な用途 | MPEG-4 based | Windows native |