NRG

Generated by scripts/gen-format-pages.py from docs/data/format-metadata/, FILE_FORMATS.csv and docs/formats-master.csv. Do not edit by hand: change the source, then run the script.

Nero NRG Image Preview.

At a glance


Purpose	A Nero Burning ROM disc image: the disc data followed by a chain of metadata chunks at the end.
Extensions	`.nrg`
Poka parser	`poka-nrg`
Viewer	`poka-tree-viewer`
Depth tier	Parser with a shared viewer (see Depth tiers)
Breadth tier	B4 Summary (see Breadth tiers)

How much Poka reads

B4 Summary. The container and metadata are read and summarised (counts, properties, structure), but the main content is not rendered.

Confidence: medium (the reviewer read the code). Basis: Reviewed 2026-10-26: read parsers/poka-nrg/src/main.rs (399 lines) and plugin.json. No unit tests or tests/samples.rs; the corpus has libcdio_p1.nrg, read by no test. Covers .nrg. The tree finds the NER5 or NERO footer, walks the chunk chain and shows the version, media type, sessions, track counts with modes and sector sizes (from DAO and TAO chunks) and the chunk structure. Judgement: B4: the image's layout is decoded, but the disc's file system is not.

What Poka does not read

The disc's file system (ISO 9660, audio tracks) is not read: no file is listed
CD-TEXT and cue sheets are listed as chunks, not decoded
Files over 4 GiB are cut

Libraries

Libraries Poka uses or has assessed for this format, with the status, licence and language the registry records.

libMirage (candidate; licence unconfirmed; C; https://sources.debian.org/src/libmirage/3.2.10-1/README) — CD-ROM image library (CDEmu); reads NRG read-only. The CDEmu suite is described as GPL, but libMirage's own licence was not confirmed.
Aaru (reference; GPL-2.0; C#/.NET; https://github.com/aaru-dps/Aaru) — copyleft; Disc image preservation suite that reads Nero Burning ROM images; some components under LGPL or MIT. Aaru.Images reuse as a library not confirmed.

Sources

parsers/poka-nrg/src/main.rs
parsers/poka-nrg/plugin.json