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PFM Raw at a glance
PFM Raw
PFM persists from the era when HDR imaging, rendering research, and tone-mapping workflows needed straightforward file carriers for floating-point image data long before mainstream consumer HDR delivery formats matured.
ASF at a glance
ASF
ASF is closely tied to the Windows Media era of desktop streaming and downloadable online media.
Format comparison
| Feature | PFM Raw | ASF |
|---|---|---|
| File type | Image | Video |
| Extensions |
|
|
| MIME type |
|
|
| Created year | 1998 | 1996 |
| Inventor | PBRT / Paul Debevec community | Microsoft |
| Status | active | active |
| Transparency | Not supported | Not supported |
| Animation | Not supported | Not supported |
| Primary use cases |
|
|
| Layer support | Not supported | Supported |
| Camera raw data | Not supported | Not supported |
| HDR support | Supported | Not supported |
| Streaming ready | Not supported | Not supported |
When to use each format
When to use PFM Raw
- Your source file is already in PFM Raw.
- Preserve source expectations before exporting to ASF.
- PFM Raw 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 PFM Raw 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 PFM Raw 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 HDR content.
What should I review after converting PFM Raw to ASF?
Validate output quality on representative files and confirm the target format behaves correctly in the destination workflow.