Convert pgm to flif

What is the difference between .pgm and .flif?

Description: A PGM file is a grayscale image file saved in the portable gray map (PGM) format and encoded with one or two bytes (8 or 16 bits) per pixel. It contains header information and a grid of numbers that represent different shades of gray from black (0) to white (up to 65,536). PGM files are typically stored in ASCII text format, but also have a binary representation.; The Free Lossless Image Format File (FLIF) is a digital image file format designed to provide high-quality lossless compression for images. Unlike lossy formats like JPEG, FLIF preserves all the original image data without any degradation, ensuring that images are compressed without sacrificing any detail or clarity. This makes FLIF an ideal choice for applications where image quality is paramount, such as digital archives, professional photography, and graphic design. FLIF also incorporates advanced features such as support for high dynamic range (HDR).