| mausschieber |
23-12-2018 04:57 |
Quote:
Originally Posted by Punisher
(Post 478065)
i like to know,
All Max Ultra Compression
LOLZ Method only in lol method.
i see some custom LOLz method like this one
lolz:tt1:d128m:mtt1:mt6:mc128
and i have test with lzma and some other this one compress better
please explain how to change this, what is tt1 d128mmtt1? mt6 mc128?
explain please...
|
i think this should help you
Code:
lolz is a compressor created on the basis of adaptive rans, suitable for any data, but shows the best results on structured data. Special models for dxt textures and raw graphics have been made (in the distant future, it may also appear for raw audio). It is possible to compress and decompress multi-threaded.
There are quite a few options in lolz, but some of them no longer work due to the lack of need for them, but they have not yet been removed from the codec. The default options are optimal in most cases.
Brief description of options:
Data Detection Options:
-dt [0..1] - enable / disable the pos_ctx / dxt / raw detector. no headers, everything is detected based on the analysis of data statistics. Default: -dt1;
-dtp [0..1] - enables / disables the transmission to subsequent blocks in the detector of statistics from previous blocks. Default: -dtp1;
-dtb [0..1] - enable / disable enumeration of all options, regardless of heuristics. Default: dtb0;
-dto [0..1] - enable / disable the detection of the best positional o1 context. Default: -dto1;
-dtm [0..1] - enable / disable multimedia detection of raw graphics. Default: -dtm1;
-dtw [0..1] - enable / disable width detection for raw graphics and dxt textures;
-dtd [0..1] - enable / disable the detection of dxt textures;
Multithreading options:
-mtt [0..1] - for multi-threaded processing, indicates the mode of operation used. At 0, the dictionary size must be at least 2 times the block size. In this mode, the data for each stream will be loaded alternating in size into a block. In this mode, in most cases, you can achieve better compression than in the second, but unpacking will require such a number of threads, as in compression. With 1, each block is compressed separately, without dependencies on neighboring data, respectively, the compression here is usually worse than in the first mode, but you can specify any number of streams to decompress. For this mode, the options from cliniot MaxThreadsUsage and MaxMemoryUsage are applied. Default: -mtt0;
-mt [1..16] - sets the number of threads to process. With -mt1 and -mtt0, normal sequential compression without loss in compression results in splitting the flow into blocks. Default: -mt1;
-mtb [2..512] - sets the block size in MB. When -mt1 -mtt0 also plays a value, but minimal. And more does not mean better. Usually for -mtt0 the optimal value is about 32-64mb, respectively, the size of the dictionary should be more than 2 times larger. For mtt1 mode, the dictionary size must be no more than the block size;
Basic options:
-d [16..2032] - the size of the dictionary in MB. Default: -d64;
-tt [1..256] - the number of paths under consideration in the optimal parser. Very much affects the speed and degree of compression, but not on decompression. Do not ask more than 16, I assure you, it is not worth it. Default: -tt4;
-oh [8..14] - sets the maximum number of bytes that the optimal parser will process at a time (2 ^ X). Default: -oh12;
-os [0 ..- oh] - sets the minimum number of bytes that the parser will process at once (2 ^ X). Default: -os8;
-fba [0..4096] - sets the size of the minimum match at which the parser will not be much trouble in the calculations. Compression accelerates well (times in 2) with a small loss of compression. At 0, these simplifications are disabled. Default: -fba256;
-fbb [0..4096] - THIS OPTION IS NOT WORKING AT THE MOMENT. I asked even more simplifications;
-al [0..1] - enables / disables the calculation of the literal price even when rep0 matches. Default: -al1;
-x [0..2] - includes slow parser modes with a miscalculation (almost) of all the lengths of the match found, as well as options match + lit + rep0match. Very slowly and mercilessly. And the benefit is very small. Simply -tt add; Default: -x0;
Matchfinder options:
-rt [0..2] - THIS OPTION AT THE MOMENT DOES NOT WORK. I set the matchfinder type to lz, rolz or a hybrid mode, but rolz did not live up to expectations and I made all the changes without taking it into account, so it does not work now; Default: -rt0;
-mc [2..1023] - Specifies the maximum number of rounds of a binary match tree, after which matches for a given position are no longer searched; Default: -mc128;
Model options:
-cm [0..1] - enables / disables a simple context mixer in some critical places, which mixes a pair of models in each place. When enabled, improves compression, but slows down unpacking. Default: -cm1;
-bc [0..8] - sets the level of influence of the previous byte on the mixer; Default: -bc4;
-lm [0..4] - THIS OPTION IS NOT WORKING AT THE MOMENT. Set the type of "elementary" literal. Complicated high-order models with cm didn’t prove to be very good, so they abandoned them, as did rolz. Default: -lm0;
-blo [0..8] - sets the degree of influence of the previous byte on the encoding of the upper part of the literal. Default: -blo8;
-bll [0..8] - sets the degree of influence of the previous byte on the encoding of the lower part of the literal. Default: -bll8;
Source: http://krinkels.org/resources/lolz.264/ |
