Convert anything, at global scale.
200+ formats and automation APIs that feels instant.
CONVERT
From
To
Drop files or choose a source
Upload multiple files at once, mix formats, and fine-tune every conversion with format-aware settings.
Max 2GB per file · Drag & drop ready · Mixed file types welcome
CROSS-FORMAT
F4V to AU Converter — Free, Online, No Signup
Convert F4V files to AU online with no signup required.
F4V at a glance
F4V
F4V emerged as Adobe's more modern MP4-based answer within the Flash video ecosystem after older FLV workflows.
AU at a glance
AU
AU belongs to an earlier multimedia era where workstation and Unix vendors often had their own practical audio defaults.
Format comparison
| Feature | F4V | AU |
|---|---|---|
| File type | Video | Audio |
| Extensions |
|
|
| MIME type |
|
|
| Created year | 2007 | 1987 |
| Inventor | Adobe | Sun Microsystems |
| Status | active | active |
| Primary use cases |
|
|
| Multitrack support | Not supported | Not supported |
| HDR support | Not supported | Not supported |
| Streaming ready | Not supported | Not supported |
When to use each format
When to use F4V
- Your source file is already in F4V.
- Preserve source expectations before exporting to AU.
- F4V is commonly used in video workflows.
When to use AU
- Your target workflow expects AU.
- Improve delivery compatibility with AU.
- AU is commonly used in audio workflows.
FAQs
Why convert F4V to AU?
Convert to AU when preserving compatibility with older Unix or workstation software, educational assets, or historical multimedia archives.
In most present-day workflows the practical task is to decode AU content and move it to WAV, AIFF, or a modern compressed format.
Use AU only when downstream compatibility makes it necessary.
What changes when converting F4V to AU?
This conversion changes how the format behaves in downstream tools and delivery environments.
What should I review after converting F4V to AU?
Validate output quality on representative files and confirm the target format behaves correctly in the destination workflow.