R3Pa4eK
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Only common switches are shown by default. This switch will display a long and detailed help. -o[filename]:
Specifies the output file name. For precompression, default is the original file name with extension .pcf, for restoring the original file, it is the original file name. If the output file exists, you will be asked if you want to overwrite it. Nevertheless, you can specify a different output file name with this option.
-c[bn]: (Comfort: Compression_Method)
The first step that Precomp does is to decompress all the streams in the input file. The output is either directly compressed using bZip2 ("-cb", default setting) or left as it is ("-cn"), i.e. if an external compressor is to be used.
-zl: (Comfort: zLib_Levels)
After precompressing a file with Precomp, it tells you how to use this parameter to speed up the precompression the next time you precompress this file. These are one or more two-digit numbers. The first digit is the compression level, the second digit is the memory settings which are tried on this file. However, using this on a different file could lead to Precomp missing some compressed parts of it.
-t: (Comfort: Compression_Types)
Enables or disables detecting of certain compression types. For command-line use, there are two variants:
t+ enables certain types and disables the others, while t- disables certain types and enables the rest.
Using -t-j for example disables JPEG recompression and leaves all other types as before, using -t+pf enables only PDF and GIF precompression, disabling everything else.
-d: (Comfort: Maximal_Recursion_Depth)
Sets the maximal recursion depth. Several streams can contain additional streams inside, for example ZIP or MIME Base64 streams. This switch specifies the maximum depth up to which Precomp will look for streams. Setting this to 0 disables recursion, the default is 10 which should be enough for most filetypes.
-f: (Comfort: Fast_Mode)
Fast mode to speed up Precomp. This switch will treat any stream like the first validated one and not test any other compression methods. This will work fine on files that use only a few compression methods, but will result in weaker compression for files with many compression methods used. Good candidates are PDF and ZIP/JAR/GZ files. Bad candidates are archives containing many different files.
With fast mode turned off, Precomp will display a message after precompression in case only one level combination was applied to the input file. This means that fast mode will do absolutely the same on this file, but faster.
-intense: (Comfort: Intense_Mode)
Intense mode will slow down Precomp much. It looks for raw zLib headers, and recognizes more file formats like SIS and SWF or special formats used only for one single program. However, the zLib header consists of only 2 bytes, so there can be many false-detected streams that aren't zLib streams but are treated like those, which results in a slower and more instable behaviour.
Intense mode can be combined with fast mode, but it could happen that a false-detected stream is the first stream and prevents further real streams to be detected, so combine them with caution. Use this mode if you have files that use zLib compression but are not supported in normal mode (SIS, SWF, ISO files...).
-brute: (Comfort: Brute_Mode)
Brute mode will slow down Precomp extremely. It assumes that there could be zLib streams without headers everywhere. This even recognizes most exotic file formats that don't include zLib headers but will take very much time (more than a minute even for filesizes around 10 KB). If you should have data that has to be processed with this mode, better try to add zLib headers on your own.
Brute mode can be combined with fast mode, but disables intense mode.
-pdfbmp[+-]: (Comfort: PDF_BMP_Mode)
This precedes PDF images with a BMP header to improve compression and speed, especially for PAQ.
-progonly[+-]: (Comfort: JPG_progressive_only)
Recompresses progressive JPGs only. Again, this is especially useful for PAQ which usually has a better JPG compression than packJPG, but lacks progressive JPG support.
-mjpeg[+-]: (Comfort: MJPEG_recompression)
Enables MJPEG recompression by inserting huffman tables into the JPG data.
-v: (Comfort: Verbose)
Verbose (debug) mode to gain additional information about detected streams and recompression success/failure. If you want a file with these informations, forward the output to it, like this: "precomp -v input_filename > verbose.txt".
-i: (Comfort: Ignore_Positions)
In verbose mode, you can see the position of streams in the file. With this parameter, you can ignore certain streams.
-s: (Comfort: Minimal_Size)
With this parameter, you can choose the minimal size of a stream that will be processed. The default is 4 bytes. Setting it to higher values (around 50-200 bytes) sometimes improves recompression, especially in intense or brute mode.
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Всего записей: 963 | Зарегистр. 15-01-2011 | Отправлено: 17:34 25-10-2011 | Исправлено: R3Pa4eK, 17:41 25-10-2011 |
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