2024年12月19日 · FLAC stands out as the fastest and most widely supported lossless audio codec, and the only one that at once is non-proprietary, is unencumbered by patents, has an open-source reference implementation, has a well documented format and API, and has several other independent implementations.

See Getting FLAC for instructions on downloading and installing the official FLAC tools, or Using FLAC for instructions and guides on playing FLAC files, ripping CDs to FLAC, etc. When we say that FLAC is "Free" it means more than just that it is available at no cost.

If you are not sure what to download, see Using FLAC for instructions and guides on playing FLAC files, ripping CDs to FLAC, etc. This section is for the official FLAC tools. See the extras section below for third-party tools that support or use FLAC. All source code and binaries are freely available and distributed under Open Source licenses.

About the FLAC Format - An overview of the FLAC format for power users. Official Tools - How to use the flac and metaflac command-line tools. Comparison - A comparison of FLAC with other lossless codecs. Bugs - How to report bugs and request features, and a …

FLAC 1.5.0 released. 11 Feb 2025. This release finally makes the encoder multithreaded! Furthermore, the decoder can now handle chained Ogg FLAC files. As always, a lot of things have been fixed and improved. See the changelog for more information. « Previous (FLAC is now formally specified in RFC 9639)

First, FLAC is probably the only lossless compressor that has a published and comprehensive test suite. With the others you rely on the author's personal testing or the longevity of the program. But with FLAC you can download the whole test suite and run it on any version you like, or alter it to test your own data.

FLAC 1.4.0 released. 09 Sep 2022. This release brings many small improvements and a few large ones. Here are the most important for end-users: FLAC can now encode and decode 32 bit-per-sample audio. This means the FLAC format is now one step closer to being fully implemented. Note that this is 32 bit integer samples, not 32 bit float samples.

flac [ -d | --decode | -t | --test | -a | --analyze] [ OPTIONS] [ infile.flac | infile.oga | infile.ogg | -…] DESCRIPTION. flac is a command-line tool for encoding, decoding, testing and analyzing FLAC streams. GENERAL USAGE. flac supports as input RIFF WAVE, Wave64, RF64, AIFF, FLAC or Ogg FLAC format, or raw interleaved samples. The decoder ...

The FLAC format is described in great detail in RFC 9639. That document also defines the mapping of FLAC in the Ogg and Matroska (mkv) containers, provides implementation guidance and contains examples walking through all decoding steps .

The basic structure of a FLAC stream is: The four byte string "fLaC " The STREAMINFO metadata block; Zero or more other metadata blocks; One or more audio frames; The first four bytes are to identify the FLAC stream. The metadata that follows contains all the information about the stream except for the audio data itself.