Given a file extension, extinfo will scrape web sources for information about what type of file is usually named with that extension.
If you want to know what's in an actual file you have on disk, you should use the file command or another tool that leverages libmagic.
pip3 install extinfo$ extinfo jpeg | fmt
From https://fileinfo.com/extension/jpeg
# JPEG Image
A JPEG file is an image saved in a compressed graphic format standardized
by the Joint Photographic Experts Group (JPEG). It supports up to 24-bit
color and is compressed using lossy compression, which may noticeably
reduce the image quality if high amounts of compression are used. JPEG
files are commonly used for storing digital photos and web graphics.
# What is a JPEG file?
JPEG file open in Microsoft Windows Photos
In the early 1980s, no technology existed that allowed users to easily
compress and share digital images with one another. In 1982, the JPEG
workgroup began designing a compression standard that could be used to
reduce image files' size, making them easier to share, while retaining
as much of their quality as possible.
In 1992, the workgroup created the JPEG file format. JPEG files are images
created using a lossy compression algorithm, which actually destroys some
data contained within the original image file. However, this data loss is
mostly unnoticeable to the human eye. Because the JPEG standard continues
to allows users to produce sharable, high-quality image files, and because
it is so embedded within technologies used to create and share images,
it is still the most common image compression standard in use today.
NOTE: A JPEG file also contains metadata that describes the contents of
its file, such as the color space, color profile, and image dimension
information. Image files saved in the JPEG format are more commonly
appended with the .JPG extension than the JPEG extension.To install development dependencies, you will need poetry and pre-commit.
pre-commit install --install-hooks
poetry install && poetry shelldirenv is optional, but recommended for convenience.