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ORF at a glance
ORF
ORF belongs to the long Olympus digital-camera story, especially in the Four Thirds and Micro Four Thirds eras where portability and serious editing often coexisted.
ASF at a glance
ASF
ASF is closely tied to the Windows Media era of desktop streaming and downloadable online media.
Format comparison
| Feature | ORF | ASF |
|---|---|---|
| File type | Image | Video |
| Extensions |
|
|
| MIME type |
|
|
| Created year | 2003 | 1996 |
| Inventor | Olympus (now OM System) | Microsoft |
| Status | proprietary | active |
| Transparency | Not supported | Not supported |
| Animation | Not supported | Not supported |
| Primary use cases |
|
|
| Layer support | Not supported | Supported |
| Camera raw data | Supported | Not supported |
| HDR support | Not supported | Not supported |
| Streaming ready | Not supported | Not supported |
When to use each format
When to use ORF
- Your source file is already in ORF.
- Preserve source expectations before exporting to ASF.
- ORF is commonly used in image workflows.
When to use ASF
- Your target workflow expects ASF.
- Improve delivery compatibility with ASF.
- ASF is commonly used in video workflows.
FAQs
Why convert ORF to ASF?
Convert to ASF when you need compatibility with older Windows Media infrastructures, enterprise archives, or inherited streaming libraries that still rely on Microsoft's classic container family.
It is useful for preservation and controlled legacy playback.
For current browser and consumer delivery, MP4 or WebM are generally better choices.
What changes when converting ORF to ASF?
This conversion changes how the format behaves in downstream tools and delivery environments.
Moving to ASF adds layer support. Moving to ASF removes camera raw data.
What should I review after converting ORF to ASF?
Validate output quality on representative files and confirm the target format behaves correctly in the destination workflow.