From Wikipedia, the free encyclopedia
Developer(s)Florin Ghido
Stable release
5.100 / September 2, 2016; 7 years ago (2016-09-02)
Preview release
4.910b (Windows only) / February 12, 2011; 12 years ago (2011-02-12)
Operating systemFreeBSD, Linux, Mac OS X, Microsoft Windows
TypeAudio compression Encoder

OptimFROG is a proprietary lossless audio data compression codec developed by Florin Ghido. OptimFROG is optimized for very high compression (small file sizes) at the expense of encoding and decoding speed, and consistently measures among the highest compressing lossless codecs.[1][2] OptimFROG comes with three compressors: one lossless codec for integer LPCM format WAVE files, one for IEEE_754 floating-point WAVE files, and a DualStream format with a lossy part and a correction file for losslessness.

OptimFROG DualStream[edit]

OptimFROG DualStream is a lossy codec, aimed to fill the gap between perceptual coding and lossless coding as OptimFROG DualStream has an option to produce a correction file. This file can be used, in combination with the main lossy-encoded file, for lossless decoding, but not, unlike Wavpack hybrid for instance, for playback.[3]

This correction feature is also offered by MPEG-4 SLS and DTS-HD Master Audio.

Technical details[edit]


The OptimFROG file formats use APEv2 tags to store the metadata. ID3 is also possible.


  1. ^ Martijn van Beurden. "Lossless audio codec comparison". Archived from the original on 2022-03-31. Retrieved 2022-03-14.
  2. ^ "SqueezeChart 2013 Lossless Audio Compression". Archived from the original on 2013-10-05. Retrieved 2022-03-14.
  3. ^ "How to use OptimFROG DualStream Correction files?". Hydrogenaudio Forums. Archived from the original on 2015-07-14. Retrieved 2015-07-13.

External links[edit]