What archivers compress files very strongly?

Question

Data archiving

I got Friark, maybe someone knows better?

Answer 1

depending on what files.
whatever speed you need.
depending on whether you need lossless compression or not.
modern common archivers like 7Zip are quite effective if you specify the maximum compression key on arbitrary data.
they can be circumvented only by significantly increasing the compression time with a slight increase in compression efficiency.
already compressed video files and sound files are almost not compressed by external archivers. to compress them - you need to re-encode.
pictures - if it's a JPEG - then you won't compress them too much. PNG - you can still try by converting to JPEG.
compression of media files (video, sound, pictures) - is done as described not by external but by internal means (the file will be converted without the possibility of initial recovery, but will be perceived by a person almost like the original).
in this case, you can choose between "compress better, lose more" or "compress worse, lose less."
well, according to the universal archiver - search for the word "fractal compression".
it is the most effective known to date.
but zhuuuuuuuuuuuuuuuuuuuuuutko slow. for example, what 7zip compresses in 15 minutes, the fractal algorithm can compress for 10 hours with a 30% advantage in percentage. Is it worth it?

Answer 2

The most efficient and at the same time the slowest general purpose compression algorithm is PPMd , supported by the 7-zip archiver. For JPEG images, Lepton
gives the best compression .