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PGM Raw at a glance
PGM Raw
The raw PGM branch reflects the practical evolution of Netpbm-style tool formats: keep the tiny header and easy parsing, but move the pixel raster into a binary form that is much more usable for real data sizes.
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 | PGM Raw | VOB |
|---|---|---|
| File type | Image | Video |
| Extensions |
|
|
| MIME type |
|
|
| Created year | 1988 | 1996 |
| Inventor | Jef Poskanzer | DVD Forum |
| Status | active | active |
| Transparency | Not supported | Not supported |
| Animation | Not supported | Not supported |
| Primary use cases |
|
|
| Layer support | Not supported | Not supported |
| Camera raw data | Not supported | Not supported |
| HDR support | Not supported | Not supported |
| Streaming ready | Not supported | Not supported |
When to use each format
When to use PGM Raw
- Your source file is already in PGM Raw.
- Preserve source expectations before exporting to VOB.
- PGM Raw is commonly used in image 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 PGM Raw 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 PGM Raw to VOB?
This conversion changes how the format behaves in downstream tools and delivery environments.
What should I review after converting PGM Raw to VOB?
Validate output quality on representative files and confirm the target format behaves correctly in the destination workflow.