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OptimFROG
OptimFROG
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OptimFROG
OptimFROG
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OptimFROG
OptimFROG
Developer(s)Florin Ghido
Stable release
5.100 / September 2, 2016; 9 years ago (2016-09-02)
Operating systemFreeBSD, Linux, OS X, Microsoft Windows
TypeAudio codec
Websitelosslessaudio.org
OptimFROG Audio file format
Filename extensions
  • .off
    (OptimFROG Float)
  • .ofr
    (OptimFROG Lossless)
  • .ofs
    (OptimFROG Small,
     a/k/a DualStream)
Internet media type
audio/x-off
audio/x-ofr
audio/x-ofs
Developed byFlorin Ghido
Initial releaseDecember 20, 2001;
23 years ago (2001-12-20)[1]
Latest release
5.100
September 2, 2016;
9 years ago (2016-09-02)
Type of formatAudio codec
CompressionLossless/lossy hybrid
Open format?No[2]
Free format?Yes[2]
Websitelosslessaudio.org

OptimFROG is a proprietary, lossless audio codec developed by Florin Ghido. OptimFROG is optimized for high compression (small file sizes) at the expense of encoding and decoding speed, and consistently measures among the highest compressing lossless codecs.[3][4] OptimFROG comes with three compressors: a lossless codec for integer LPCM format in WAV files, one for IEEE 754 floating-point WAV files, and third codec called DualStream.

OptimFROG DualStream is lossy, but fill the gap between perceptual coding and lossless coding by producing a correction file. In combination with the main, lossy-encoded file, the correction file provides for lossless decoding. The lossless decoding is computationally intense and cannot be done in real time on contemporary hardware.[5] The rival audio codecs WavPack. MPEG-4 SLS, and DTS-HD Master Audio also offer correction file generation.

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

References

[edit]
  1. ^ Ghido, Florin (March 4, 2022). "News". OptimFROG. Archived from the original on August 13, 2022. Retrieved January 24, 2025.
  2. ^ a b Ghido, Florin (June 21, 2015). "License". OptimFROG. Archived from the original on March 1, 2022. Retrieved January 24, 2025.
  3. ^ Martijn van Beurden. "Lossless audio codec comparison". Archived from the original on 2022-03-31. Retrieved 2022-03-14.
  4. ^ "SqueezeChart 2013 Lossless Audio Compression". Archived from the original on 2013-10-05. Retrieved 2022-03-14.
  5. ^ "How to use OptimFROG DualStream Correction files?". Hydrogenaudio Forums. Archived from the original on 2015-07-14. Retrieved 2015-07-13.
[edit]


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