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MPEG-2 at a glance
MPEG-2
MPEG-2 was developed as the successor to MPEG-1, scaling video quality from VHS-level to broadcast and studio levels. It underpinned the DVD-Video standard (1996) and digital broadcast systems worldwide (DVB, ATSC, ISDB).
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.
Format comparison
| Feature | MPEG-2 | PGM Raw |
|---|---|---|
| File type | Video | Image |
| Extensions |
|
|
| MIME type |
|
|
| Created year | 1995 | 1988 |
| Inventor | Moving Picture Experts Group (MPEG) | Jef Poskanzer |
| 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 | Supported | Not supported |
When to use each format
When to use MPEG-2
- Your source file is already in MPEG-2.
- Preserve source expectations before exporting to PGM Raw.
- MPEG-2 is commonly used in video workflows.
When to use PGM Raw
- Your target workflow expects PGM Raw.
- Improve delivery compatibility with PGM Raw.
- PGM Raw is commonly used in image workflows.
FAQs
Why convert MPEG-2 to PGM Raw?
Convert to PGM raw when a pipeline needs direct grayscale raster data for vision research, microscopy or scientific-image preprocessing, algorithm tests, or command-line tooling where minimal format overhead matters.
It is particularly useful as an intermediate format between automated processing steps.
What changes when converting MPEG-2 to PGM Raw?
This conversion changes how the format behaves in downstream tools and delivery environments.
Moving to PGM Raw removes streaming delivery.
What should I review after converting MPEG-2 to PGM Raw?
Validate output quality on representative files and confirm the target format behaves correctly in the destination workflow.