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ASF at a glance
ASF
ASF is closely tied to the Windows Media era of desktop streaming and downloadable online media.
MQV at a glance
MQV
The .mqv extension appeared on some Sony camcorders and recording devices around the mid-2000s as an internal variant of the QuickTime/MOV container carrying Sony-proprietary metadata tracks and stream wrappers.
Format comparison
| Feature | ASF | MQV |
|---|---|---|
| File type | Not available | Not available |
| Extensions |
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| MIME type |
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| Compression / quality | Not available | Not available |
| File size characteristics | Not available | Not available |
| Compatibility | Not available | Not available |
| Editability | Not available | Not available |
| Created year | Not available | Not available |
| Inventor | Not available | Not available |
| Status | Not available | Not available |
| Transparency | Not available | Not available |
| Animation | Not available | Not available |
| Primary use cases |
|
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| Common software |
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| Archival suitability | Not available | Not available |
| Metadata handling | Not available | Not available |
| Delivery profile | Not available | Not available |
| Workflow fit | Not available | Not available |
| Layer support | Not available | Not available |
| Multitrack support | Not available | Not available |
| Camera raw data | Not available | Not available |
| HDR support | Not available | Not available |
| Streaming ready | Not available | Not available |
When to use each format
When to use ASF
- editing
- mastering
- streaming delivery
- Historically important in Microsoft media ecosystems.
When to use MQV
- editing
- mastering
- streaming delivery
- QuickTime/ISO BMFF lineage makes the underlying structure parseable by many media tools.
FAQs
Why convert ASF to MQV?
Choose MQV as target when convert to or from MQV when migrating recordings off older Sony consumer devices, preserving original camera exports, or normalizing a proprietary Sony library into MP4, MOV, or another easier editing format.
What changes when converting ASF to MQV?
Convert to or from MQV when migrating recordings off older Sony consumer devices, preserving original camera exports, or normalizing a proprietary Sony library into MP4, MOV, or another easier editing format. It is primarily a legacy-ingest and archive-recovery format.
What should I review after converting ASF to MQV?
After conversion, review these destination checks: Open converted output in Sony PlayMemories and verify behavior on real samples; Compare output against the expected depends quality profile; No public specification or documentation.
How can I keep quality stable in ASF to MQV conversion?
Run representative samples, keep settings deterministic, and monitor these risks: Very limited software support outside Sony's own applications; No public specification or documentation; Validate destination compatibility before large-batch conversion.