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Thread: Experimental new ZCM file compressor!

  1. #211
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    I think a bug has been introduced after 0.90, I have a file that crashes zcm 0.91B, 0.92 and 0.92_x64 but compresses fine with 0.90. It is an iso file, I have tried ~50 others that compress fine with 0.92. All crashes occur at the same progress into the compression

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  3. #212
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    So are you saying it crashes with any .iso? If not need example. J

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    @Pedro
    could you specify what it is. At least know the contents of the iso which gave problems.

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    All the iso's I ripped from my PSP UMD's, they conform to ISO 9960, the problematic one has .at3 audio files (I believe ATRAC3 or ATRAC3plus), .pmf videos (Playstation Movie Files) not sure of the basis for the format, some MIPS binary executable, and a 600+MB .dat file, presumably containing most of the game files ie txt, exe, textures, 3d models etc. Many of those files, especially at3 and pmf will be common to most of the iso's

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  7. #215
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    Thanks Pedro !

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    Thumbs up

    Go Nania, go! You are near to Nanozip performances! When there will be the overtake?
    Can you do a GUI version for ZCM? So, people can begin to gain confidence with your software!
    Last edited by PiPPoNe92; 18th July 2014 at 18:07.

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  10. #217
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    Thanks for this comments !
    I think however has passed the zcm performace of Nanozip if performance means the efficiency of compression and decompression! Before you release a gui version should solve the problem of creating folders and change file attributes on which I've been working lately!

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    .
    Last edited by a902cd23; 3rd October 2014 at 22:54. Reason: never mind... delete this post

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    I tried to use ZCM via Freearc 0.67 by following definition. But Freearc fails to decompress the file and says: ERROR: invalid compression method or parameters in zcm. But compressing and decompressing by ZCM.exe (not Freearc) is fine.

    Has anybody tried to use ZCM via Freearc?

    Code:
    [External compressor:zcm]
    packcmd   = zcm a -s -r {options} $$arcpackedfile$$.tmp  $$arcdatafile$$.tmp
    unpackcmd = zcm x $$arcpackedfile$$.tmp

  13. #220
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    I think there are some inefficiencies when you have lots of files in the archive.

    Compressing boost (11000 files, lots of c++ sources, lots of dll's) with
    zcm a -m7 -t1 -v -r -s

    got me a file boost.zcm with 24.747.791 bytes.

    When I compress this file again using
    zcm a -m7 -t1 -v -r -s boost2.zcm boost.zcm

    boost2.zcm is only 23.475.658 bytes, about 5% smaller.

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    I would like support for pipe - stdin / stdout.

  15. #222
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    ZCM 0.93 released!

    News:
    - New CM core stable !
    - better compression !

    Only from:
    http://heartofcomp.altervista.org/

    @Matt
    Please if possible test ZCM in LTCB and 10GB Benchmark's
    Last edited by Nania Francesco; 13th May 2015 at 01:07.

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    Thanks for all test Matt!

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    Hello I tested on my test files and noticed very poor compression compared to previous version on one tar file with bmp files inside it. It looks like if you reorder bmp files inside tar archive in particular way it causes very poor compression. Attached example of problem.
    bmp_bad.tar and bmp_good.tar contain same two bmp files only in different order.
    bmp_good.tar is compressed to 274165 bytes and bmp_bad.tar to 361133 bytes (with -m7).
    Attached Files Attached Files
    Last edited by Jan Ondrus; 13th May 2015 at 23:19.

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    Hello I tested on my test files and noticed very poor compression compared to previous version on one tar file with bmp files inside it. It looks like if you reorder bmp files inside tar archive in particular way it causes very poor compression. Attached example of problem.
    bmp_bad.tar and bmp_good.tar contain same two bmp files only in different order.
    bmp_good.tar is compressed to 274165 bytes and bmp_bad.tar to 361133 bytes (with -m7).
    Honestly, I had to make choices that have improved overall results, sacrificing unfortunately results in some file types. Scanning or data analysis in a portion (step) smaller than the previous version (16 KB against the previous 128 KB) , probably the older version did not recognize as BMP and compressed with LZP cm (more powerful in parts with repetitions but slow)
    You would however help with tests on large amounts of data to check the tightness of the cm core and my results seem very stable.
    Last edited by Nania Francesco; 14th May 2015 at 01:10.

  22. #227
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    @Nania:

    i have tested the new zcm with a 4.5-Gigabyte-file (dmp-file from a oracle12c-database)
    ... the compression result is worse in comparision to older compressors
    and the compression result is worse in comparision with zip too

    i think something in the optimizing goes wrong ...

    best regards

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  24. #228
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    No 32-bit release?

  25. #229
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    No 32-bit release?
    I added zcmx86 version to download file zcm093.zip (max memory option is -m7) !

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    Question

    Quote Originally Posted by Nania Francesco View Post
    I added zcmx86 version to download file zcm093.zip (max memory option is -m7) !
    The zcm093.zip still contains one zcm.exe and it's the 64-bit compiled version...

  27. #231
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    it conatins both for me. (now?)

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    Not working my friend Sorry...
    Just crushes without doing anything but to write an empty arch... (x86 build).
    Args are -m0 -t1 -v

  29. #233
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    Question

    Quote Originally Posted by load View Post
    it conatins both for me. (now?)
    This is... weird...

    I go to the page:
    http://heartofcomp.altervista.org/
    Then click on the link ZCM archiver v.0.93 (download)
    (link is http://heartofcomp.altervista.org/zcm093.zip)

    I download the file, zcm093.zip , it is (227.659 bytes)
    It contains only one exe, it is zcm.exe (237.568 bytes), a 64-bit exe.
    Zip file has no errors in it.

    Any idea? what's going wrong ?

  30. #234
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    Unhappy

    Quote Originally Posted by Gonzalo View Post
    Not working my friend Sorry...
    Just crushes without doing anything but to write an empty arch... (x86 build).
    Args are -m0 -t1 -v
    It seems the http://heartofcomp.altervista.org/ uses strange caching...
    I was able to bypasses and finally download the new zip file (415.041 bytes, contains zcmx86.exe and zcmx64).
    However... also for me zcmx86.exe crashes when "zcm a ..." command is run

  31. #235
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    Quote Originally Posted by ZGish View Post
    It seems the http://heartofcomp.altervista.org/ uses strange caching...
    I was able to bypasses and finally download the new zip file (415.041 bytes, contains zcmx86.exe and zcmx64).
    Couldn't it be your browser's cache? Are you using a Download Manager? Which one?

  32. #236
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    Quote Originally Posted by Gonzalo View Post
    Couldn't it be your browser's cache? Are you using a Download Manager? Which one?
    It's likely something between my browser and the server (maybe a net proxy caching), however the point is that zcmx86.exe is not working.
    I experience your same problem: zcm crashes immediately generating an empty archive (0 bytes) .
    The zip file is not corrupted, there's something wrong in the executable.
    Maybe a bad linking or compile.

  33. #237
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    Quote Originally Posted by ZGish View Post
    It's likely something between my browser and the server (maybe a net proxy caching), however the point is that zcmx86.exe is not working.
    I experience your same problem: zcm crashes immediately generating an empty archive (0 bytes) .
    The zip file is not corrupted, there's something wrong in the executable.
    Maybe a bad linking or compile.
    Well, for me the archive is not 0 bytes, it has a ┬┐header? with the name of the file it have to be compressed and perhaps another info... Didn't check if is there any length, method info or something.
    Attached Files Attached Files

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    Click image for larger version. 

Name:	7SLHXEq.gif 
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ID:	3592

  35. #239
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    Quote Originally Posted by Gonzalo View Post
    Well, for me the archive is not 0 bytes, it has a ┬┐header? with the name of the file it have to be compressed and perhaps another info... Didn't check if is there any length, method info or something.
    Yes, effectively also my file is not really empty. It's just 45 bytes with a short header.
    Click image for larger version. 

Name:	sibil-zcm.gif 
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Size:	6.0 KB 
ID:	3593

  36. #240
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    This version is compiled with GCC 4.6.1 win32 version (released version with 4.9.1) and optimized for >=core2 duo intel cpu
    Attached Files Attached Files

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