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AVIF at a glance
AVIF
AVIF emerged from the Alliance for Open Media's work around AV1 and uses the HEIF family as its structural container, which connects it to both modern web delivery and newer image-container design.
MEF at a glance
MEF
Digital photography fragmented into many manufacturer-specific raw formats because camera makers optimized for their own sensors, metadata, and software ecosystems rather than for one shared public raw standard.
Format comparison
| Feature | AVIF | MEF |
|---|---|---|
| File type | Image | Image |
| Extensions |
|
|
| MIME type |
|
|
| Created year | 2019 | 2005 |
| Inventor | Alliance for Open Media | Mamiya |
| Status | active | proprietary |
| Transparency | Not supported | Not supported |
| Animation | Supported | Not supported |
| Primary use cases |
|
|
| Layer support | Not supported | Not supported |
| Vector scaling | Not supported | Not supported |
| Camera raw data | Not supported | Supported |
| HDR support | Supported | Not supported |
| Streaming ready | Not supported | Not supported |
When to use each format
When to use AVIF
- Your source file is already in AVIF.
- Preserve source expectations before exporting to MEF.
- AVIF is commonly used in image workflows.
When to use MEF
- Your target workflow expects MEF.
- Improve delivery compatibility with MEF.
- MEF is commonly used in image workflows.
FAQs
Why convert AVIF to MEF?
Convert to MEF when preserving Mamiya camera originals or maintaining compatibility with medium-format photographic workflows that still expect that raw format.
It is appropriate for archive masters and non-destructive editing.
What changes when converting AVIF to MEF?
This conversion changes how the format behaves in downstream tools and delivery environments.
Moving to MEF removes animation support. Moving to MEF adds camera raw data. Moving to MEF removes HDR content.
What should I review after converting AVIF to MEF?
Validate output quality on representative files and confirm the target format behaves correctly in the destination workflow.