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    Creating pdf from djvu file

    Hi,

    First of all I have to say I am not computer expert by any means, but I will have a go if I have dead-simple, blow-by-blow instructions!

    I have downloaded a rare technical manual of some 100 pages contained in four djvu files of 25 pages each approx. Djvu files are probably great but you can't do much with them without a reader. So I looked around for either a reader or something to convert them to pdf files which may be less clever than djvu but at least everybody in the world can open your file! On my search I found irfanview which not only provided a reader but said it could convert the files to pdf - just what I want! So I downloaded Irfanveiw. It didn't work straightaway, I had to download some plug ins too which stretched my ability a little but I did it. This now works fine for veiwing and will probably be fine for printing but I still would prefer pdf files so I really would like to convert the djvu files to pdf. Now my problem is the conversion starts OK but the little green blocks get stuck near the end and it all falls over. I thought, OK, so that doesn't work so I tried to save the djvu files at jpgs and then bmps and convert those to pdfs at work but in both cases the conversion only did the single page on veiw not the whole set of 25 pages. It would do it but it seems I have to convert each page individually - pain! Irfanveiw did create a pdf file but it won't open saying it needs Ghostscript. So I downloaded that and it seemed to install but nothing has changed. If i find the ghostscript exe file buried deep inside C/Program files/gs/bin, clicking on that only opens a dos-looking dialogue box and nothing happens. The Ghostscript help file is certainly not written for someone of my limited computer knowledge, it is barely readable. I am at my wit's end!! All I want to do is convert four files to pdf!! Can anyone help in simple language please?

    PS I am running Windows XP on a laptop, and it is 32bit (whatever that means).

    Oh, by the way I read the post "how to install Ghostscript" but it doesn't make much sense to me. Nothing on my computer seems to match what has been written.
    Last edited by revodes21; 21.03.2012, 10:18 PM. Reason: Forgot to put in a bit

    #2
    Do you have a link to the DjVu files?

    I tested with one that I have and it worked fine. (Well it saved OK, but it was 4 Mbytes instead of 434 Kbytes).
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      #3
      Hi, thanks for replying!

      Ah - does that mean I have to save the file(s) on-line somewhere? Please advise where would be a good place (good, as in free) and I will put the file there for you to look at. The djvu files are 8.2Kb, 7.4Kb, 4.8Kb and 4.3Kb.

      Thanks, John

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        #4
        If you do mean kilobytes then you can just zip the files and attach them to the forum (Go advanced below the message box). If you mean megabytes then you can send one or more to my uploads link — (current password revodes21)

        Document Courier is a Unite Application for Opera Browser that conveniently lets anyone send files directly to my hard drive whenever I am running Opera. Its free, fast, and there are no annoying ads. The password is optional, and the file size is pretty much unlimited. My uploads folder is set to allow files of up to 2 Gbytes.

        The sender can be using any browser. Only the recipient must be running Opera. I am going offline now, so the link won't be available for a few hours.
        Last edited by Bhikkhu Pesala; 22.03.2012, 01:49 PM.
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          #5
          Hi, yes kilobytes. I tried attaching the original zipped folder with four djvu files but it wouldn't have it. I then tried zipping the original files into two smaller folder but it was the first time I'd ever done zipping and whether I wasn't doing it right or what but those files refused to attach as well. I then used your opera file sharing device and that seemed to go fine.

          I tried converting another djvu file to pdf and that wouldn't convert either. I started off OK and I had high hopes it would work but near the end it froze and then fell over.

          I can't understand what is going wrong, it is the lastest version with all the plugins? Any ideas?

          John

          Actually, since I posted that - maybe it is this Ghostscript thingy I need? I downloaded it but there must be more to it than just downloading it because it still wouldn't convert.
          Last edited by revodes21; 22.03.2012, 07:29 PM.

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            #6
            I received the files. The sizes are in Mbytes, not Kilobytes, which explains why the archive is too big to attach to the forum.

            After chuntering away for several minutes, the first djvu file (Li-2_1.djvu) which is 4.75 Mbytes, exported successfully to a PDF, which opened in my PDF viewer. The PDF file is 130 Mbytes. It may be that I have my postscript settings too high. but I don't think that's the issue.

            The original scans are 600 dpi in the djvu file. I guess that's why they chose to save the manual in that format. The huge file sizes of PDF format are just too troublesome for distribution, hosting on servers, etc.

            Let people download a djvu — since IrfanView plugins will let anyone view djvu files I don't see this as a problem. Its hardly worth the trouble of converting this manual to PDF.

            Extracting all of the images, resizing them to 150 or 300 dpi, and creating a PDF file might be the way to go.

            Although the progress bar doesn't seem to update after a while, the process runs to the end, using a modest amount of RAM and CPU cycles.
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