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  1. #1
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    Compression (XP)

    I read in a newsletter recently about Windows command line compression tool. It works and works well. However, my need is to, through Access, have an offsite data Db file compacted and emailed to me. I currently use WinFax command line and it works fine, but there is a cost for each computer. Because of the cost, I only use WinFax on 1 computer, but having the ability to do this from all computers would be very handy. My thought was to use Win compression, but when the file is copied to the email the compaction is gone! Does anyone know if there any way to save the compaction on emailing?
    Regards,
    Peter

  2. #2
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    Re: Compression (XP)

    Here is a good article about how email encoding is done, which, summarised significantly, means that for each three bytes of your attachment file *the email system has to transmit four bytes of data. So (loosely speaking), if your attachment is 750 KB on your hard disk then the 'size during transmission' is around a megabyte. This explains why the Size of the email message plus attachment which you see in the Sent Items view in Outlook Express or Outlook (if you've added that column field) is always much more than your file size on disk.

    If your file has been compressed (say by the Windows Explorer File -> Send to -> Compressed (zipped) Folder, or using any of the xxxZIP programs) the compressed data gets encoded during transmission and becomes temporarily larger, but when received at the far end and saved to disk it is the exact, same-size, compressed file as it was on your transmitting PC.

    John
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  3. #3
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    Re: Compression (XP)

    Thanks John. That
    Regards,
    Peter

  4. #4
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    Re: Compression (XP)

    If you have Winzip, you might use WinZip Companion for Outlook and/or WinZip Command Line Add-On.

  5. #5
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    Re: Compression (XP)

    Thanks Hans, ' The human encyclopedia'.
    WinZip command line is what I'm curently using. It works splendidly, but it costs and has to be installed on each computer. The cost arises from the fact that WinZip command line will now only work on WInZip Pro. The user is a charity and cost is not really an option. When I read about the Windows compression tool, I thought that it would be perfect, no cost and no installation. Unfortunately, for the use I want, it looks like it wont work. I guess I will continue to limit the file emailing to the the one computer with WInZip command line installed.
    Regards,
    Peter

  6. #6
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    Re: Compression (XP)

    Check out the <img src=/S/free.gif border=0 alt=free width=30 height=15> SourceForge.net: 7-Zip. Yes, it would have to be installed on each machine that you intend to have produce the compressed file but it is <img src=/S/free.gif border=0 alt=free width=30 height=15>. There are several other pretty good <img src=/S/free.gif border=0 alt=free width=30 height=15> compressions utilities some of which you can investigate at NONAGS Compression Utilities - Freeware.

    Joe
    Joe

  7. #7
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    Re: Compression (XP)

    There are free compression utilities that also provide a command-line interface. For example 7-Zip.

  8. #8
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    Re: Compression (XP)

    Am trying 7-zip. Having trouble creating an archive. There only seems to be a command to add to an existing archive. But I must be miss-reading the instructions. I have put in a question to their support and hopefully will get clarification. Thanks for the suggestion.
    Regards,
    Peter

  9. #9
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    Re: Compression (XP)

    Thanks Joe. There sure are a few zip utilities. Currently trying 7-zip. See reply to Hans.
    Regards,
    Peter

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