Tool, language, and decoders for working with binary data. fq is inspired by the well-known jq tool and language and allows you to work with binary formats the same way you would using jq. In addition, it can also present data similar to a hex viewer, transform, slice, and concatenate binary data, supports nested formats, and has an interactive REPL with auto-completion. It was originally designed to query, inspect and debug codecs and metadata in media files and containers like mp4, FLAC, mp3...