Re: [libreoffice-users] Export PDF

 Cley Faye <cleyfaye@gmail.com> wrote:

> 2014-02-08 23:40 GMT+01:00 Cliff Scott <cfly@intergate.com>:
>
> > I've run into a strange occurrence in LO 4.1.4. Everytime I export to PDF I
> > get a error message that "PDF/A-1a forbids a transparency". Clicking OK
> > allows the export to continue and I don't see any problems in the resultant
> > PDF, but this is something I've only seen on 4.1.4. This happens with
> > Writer
> > and Calc. FYI, I'm running OSx Mavericks. Is this a known problem?
>
> ?I can tell you that it did happen with previous versions. It's only shown
> if you have transparent items in the document, so it might not show up all
> the time.
>
> Now, to know what is transparent is more complicated. It could be an image
> with an alpha channel (even if completely opaque). It might also be
> anything that LO treat as transparent (maybe borders, some special
> characters, etc... I don't really know). The thing is, if your output is
> correct, it's probably the kind of transparent item that get converted to
> white image over white background... no worries.
>
> However, a bit of warning from personal experience: a few years ago, some
> people (mainly using Acrobat Reader I believe) couldn't open PDF/A-1, while
> these same files would open fine on pretty much anything: gnome document
> viewer, kde viewer (okular), foxit on windows... Pretty funny if you
> consider that PDF/A-1 is supposed to work for long term storage. You should
> double-check that your files open with this certain reader, just to be sure
> :)

Cley,

I appreciate your comments. I don't know much about the various PDF formats
and don't know how I ended up with that format. For some reason I guess at
some time I thought it was the best generally readable format. I notice if I
uncheck that format it jumps to "Create PDF Form" with 4 format options.
Since I'm not making forms it seems as if that isn't the best option. Tagged
PDF seems to be the only option left. Is that the recommended format? The
help implies that the fonts are only imbedded in PDF/A-1a so does that mean
that someone opening a Tagged Format PDF may have problems if they don't have
the same fonts installed? I thought that wasn't supposed to be the case.

In testing I have just done, the PDF/A-1a came out as 89k, Tagged - 83k and
"Create PDF Form" using the PDF format ended up as 67k. I normally am looking
for the smallest size so as not to burden people with slow access speeds. All
three are readable in Acrobat as well as Preview on my Mac. There's no way I
can know what reader everyone will be using if there are any issues any more.
Any further comments are welcome.

Cliff

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