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Thread: Best compression for multimedia

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    Best compression for multimedia

    Hello,
    This is my first post.
    I often use nanozip 0.9a for linux with the -cm compression for my multimedia (mp4 and pdf) files. I wanted to know if I can compress more with another piece of software for Linux Ubuntu 64 bits. I have 16 GB Ram and a Intel Core I5. Files to compress are between 100 and 400 Mb.
    Can you provide a link so I can successfully compile a version of PAQ or another one ? I had no luck compiling for Linux some versions of PAQ. The destination will be "in the cloud", or a remote backup, this is the reason I want the highest compression.
    Thank you.

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    Simply spoken - http://www.mattmahoney.net/dc/zpaq.html

    Best regards,

    FatBit

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    nz -cc -m1g ... 121 815 542 bytes
    zpaq -m511 ... 121 715 595 bytes (with tar before 121 467 034 bytes)

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    I save directories. 90 % contains MP4 videos so I thank you for pointing this PDF reducer, it may help in the future.
    Last edited by Phil; 12th December 2017 at 05:39. Reason: remove off topic

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    Out of curiosity, how much compression are you getting on these MP4 files ?

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    NanoZip 0.09 alpha/Linux64 (C) 2008-2011 Sami Runsas www.nanozip.net
    Intel(R) Core(TM) i5-3450S CPU @ 2.80GHz|2872 MHz|#2+HT|3686/15996 MB
    Archive: video.nz
    Threads: 2, memory: 1024 MB, IO-write-buffer: 1 MB
    Compressor #0: nz_cm [485 MB]
    Compressor #1: nz_cm [485 MB]
    Compressed 132 856 769 into 120 405 818 in 1m 17.65s, 1671 KB/s
    IO-in: 0.05s, 2263 MB/s. IO-out: 0.07s, 1511 MB/s

    Zpaq -method 511,13,0
    132 856 769 -> 119 953 583
    461.159 seconds

    NZ is faster.

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    what would be the best method in ZPAQ for compressing a file (time doesnt matter). i have only 8GB of memory tho.

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    Quote Originally Posted by Phil View Post
    NanoZip 0.09 alpha/Linux64 (C) 2008-2011 Sami Runsas www.nanozip.net
    Intel(R) Core(TM) i5-3450S CPU @ 2.80GHz|2872 MHz|#2+HT|3686/15996 MB
    Archive: video.nz
    Threads: 2, memory: 1024 MB, IO-write-buffer: 1 MB
    Compressor #0: nz_cm [485 MB]
    Compressor #1: nz_cm [485 MB]
    Compressed 132 856 769 into 120 405 818 in 1m 17.65s, 1671 KB/s
    IO-in: 0.05s, 2263 MB/s. IO-out: 0.07s, 1511 MB/s

    Zpaq -method 511,13,0
    132 856 769 -> 119 953 583
    461.159 seconds

    NZ is faster.
    Is the 10% compression worth it ? I mean, does the compression/decompression time beat the time difference in upload/download ? 12 MB / 77.65 s => 157 KB/s

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    Smile

    Quote Originally Posted by hexagone View Post
    Is the 10% compression worth it ? I mean, does the compression/decompression time beat the time difference in upload/download ? 12 MB / 77.65 s => 157 KB/s
    You mean 120 MB ? Read carefully my post above.
    I generally put several files in a TAR (Linux) file and then compress it with nz. 1 or 2 minutes is not much waiting. I may put a password too.
    So no the compression/decompression time can't beat the upload/download for multimedia files.
    This is just a challenge "who's got the smallest one ?"

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    Quote Originally Posted by Phil View Post
    You mean 120 MB ? Read carefully my post above.
    I meant (roughly) 132MB-120MB=12MB.
    Thanks for the info anyway.

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