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PMD at a glance
PMD
The .pmd extension appeared in Sony's prosumer and professional recording device output alongside other Sony-proprietary formats like MQV, serving as a companion metadata or media descriptor file.
VOB at a glance
VOB
VOB belongs to the age when physical discs dominated home video distribution and playback behavior was shaped by DVD standards.
Format comparison
| Feature | PMD | VOB |
|---|---|---|
| File type | Video | Video |
| Extensions |
|
|
| MIME type |
|
|
| Created year | 2004 | 1996 |
| Inventor | Sony | DVD Forum |
| Status | legacy | active |
| Transparency | Not supported | Not supported |
| Animation | Not supported | Not supported |
| Primary use cases |
|
|
| Layer support | Not supported | Not supported |
| Multitrack support | Not supported | Not supported |
| Camera raw data | Not supported | Not supported |
| HDR support | Not supported | Not supported |
| Streaming ready | Supported | Not supported |
When to use each format
When to use PMD
- Your source file is already in PMD.
- Preserve source expectations before exporting to VOB.
- PMD is commonly used in video workflows.
When to use VOB
- Your target workflow expects VOB.
- Improve delivery compatibility with VOB.
- VOB is commonly used in video workflows.
FAQs
Why convert PMD to VOB?
Convert to VOB when preserving DVD-video structure, maintaining authored disc compatibility, or recovering content from DVD-based collections.
It is useful for archival and disc-focused workflows where the DVD container family still matters.
For file-based viewing and sharing, MP4 is usually the better target.
What changes when converting PMD to VOB?
This conversion changes how the format behaves in downstream tools and delivery environments.
Moving to VOB removes streaming delivery.
What should I review after converting PMD to VOB?
Validate output quality on representative files and confirm the target format behaves correctly in the destination workflow.