install

Additional install commands

macOS

Homebrewverified · 100%

brew install grokj2k

local Homebrew formula metadata

overview

Package summary

JPEG 2000 Library

Project links

Homepage

Commands and aliases

grk_compress
grk_decompress
grk_dump
grk_transcode

history

Project history and usage

grokj2k packages Grok, an open-source JPEG 2000 codec focused on fast encoding, decoding, transcoding, and modern JPEG 2000 features.

Project history

The Grok repository describes the project as an AGPL-licensed JPEG 2000 codec. Its command-line tools include compression, decompression, dumping, and packet-level transcoding utilities for JP2 and J2K workflows.

The project presents itself as a high-performance codec with support for High Throughput JPEG 2000, random-access decoding markers, cloud/S3-oriented I/O, metadata handling, broad pixel-format support, and bindings for several languages.

Adoption history

Grok's packaging history is tied to specialist image, geospatial, preservation, and scientific workflows where JPEG 2000 remains useful. The upstream README specifically notes integration into GDAL, making the package relevant to users who need JPEG 2000 support through geospatial tooling.

How it is used

Package users typically reach it through utilities such as `grk_compress`, `grk_decompress`, `grk_dump`, and `grk_transcode`. The transcoder can rewrite JPEG 2000 files at packet level for operations such as adding TLM and PLT markers without a full decode/re-encode cycle.

Why package nerds care

For package nerds, grokj2k sits in the same small but important corner as OpenJPEG, Kakadu, JasPer, and image-library delegates: it is not a daily shell toy, but it determines whether image stacks can process JP2/J2K data reproducibly from system packages.

Timeline

2016: The GitHub repository was created.
2020s: The project emphasized high-performance JPEG 2000, HTJ2K, transcoding, cloud I/O, and fuzz testing.
2020s: Homebrew packaged the command-line tools as `grokj2k`.

Related projects

Related projects include OpenJPEG, Kakadu, JasPer, GDAL's JP2 drivers, image servers that consume JPEG 2000, and preservation workflows that use JP2/J2K assets.

Sources

security posture

No protected-tool coverage found yet

No matching local secret-handling manifest was found for grokj2k. Nucleus package metadata is still published here so future coverage has a stable package URL.

Install behavior

No Homebrew bottle metadata was recorded.

Recommended review

Before unattended agent use, check whether the tool reads plaintext credentials, writes remote state, publishes artifacts, or shells out to plugins.

executables

Installed executables

Command	Kind	Exposure	Note
`grk_compress`	executable	indexed executable	Discovered from the local executable index.
`grk_decompress`	executable	indexed executable	Discovered from the local executable index.
`grk_dump`	executable	indexed executable	Discovered from the local executable index.
`grk_transcode`	executable	indexed executable	Discovered from the local executable index.

freshness

Version and freshness

These signals separate page generation age, package-manager activity, and upstream release comparison. Version lag is warned only when an evidence URL and comparable versions are present.

page generated2026-08-03

manager version20.3.8

manager updated2026-08-03

local dataunknown

upstreamnot available

latest detectednot detected

okNo freshness warnings were generated.

install metadata

Package metadata

Package key	brew:grokj2k
Version	20.3.8
Package manager	Homebrew
Homepage	https://github.com/GrokImageCompression/grok
Repository	https://github.com/GrokImageCompression/grok
Last updated	2026-08-03T03:34:23Z
Pulse	updated
Bottle	not recorded
Service	none declared

package graph

Links come from deterministic package relationships, av.db category and tag curation, ecosystem matches, and package hub membership.

source trail

Generated from repository data

This page is generated by av-web from the private package SQLite artifact built by scripts/generate-pkg-sqlite.py.

Combined YAML source

View the package source record on GitHub.

combined/grokj2k.yml

Used sources

Geiger risk classifier
cross-ecosystem install command graph
curated package history
pkg.so package database
pkgdb category and tag curation

Install grokj2k with Homebrew