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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.
3G2 at a glance
3G2
3G2 belongs to an era when mobile ecosystems were more fragmented across standards families, carriers, and handset capabilities.
Format comparison
| Feature | PGM Raw | 3G2 |
|---|---|---|
| File type | Image | Video |
| Extensions |
|
|
| MIME type |
|
|
| Compression / quality | depends | depends |
| File size characteristics | medium | large |
| Compatibility | broad | moderate |
| Editability | moderate | limited |
| Created year | 1988 | 2004 |
| Inventor | Jef Poskanzer | 3GPP2 |
| Status | active | active |
| Transparency | Not supported | Not supported |
| Animation | Not supported | Not supported |
| Primary use cases |
|
|
| Common software |
|
|
| Archival suitability | moderate | moderate |
| Metadata handling | moderate | moderate |
| Delivery profile | strong | strong |
| Workflow fit | delivery | delivery |
| 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
- capture ingest
- editing
- web or print delivery
- Minimal binary grayscale format that is easy to implement.
When to use 3G2
- editing
- mastering
- streaming delivery
- Useful for long-tail mobile-media compatibility.
FAQs
Why convert PGM Raw to 3G2?
Choose 3G2 as target when preserving compatibility with legacy CDMA handset recordings, telecom media archives, or workflows that explicitly expect 3GPP2-style mobile video.
What changes when converting PGM Raw to 3G2?
Convert to 3G2 when preserving compatibility with legacy CDMA handset recordings, telecom media archives, or workflows that explicitly expect 3GPP2-style mobile video. It is useful for migration and recovery of old phone clips. For current playback and sharing, MP4 is almost always the better destination.
What should I review after converting PGM Raw to 3G2?
After conversion, review these destination checks: Open converted output in older phones and verify behavior on real samples; Compare output against the expected depends quality profile; Mostly legacy today.
How can I keep quality stable in PGM Raw to 3G2 conversion?
Run representative samples, keep settings deterministic, and monitor these risks: Recipients usually prefer conversion into more current containers; Mostly legacy today; Validate destination compatibility before large-batch conversion.