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Re: [Swftools-common] PDF2SWF Error: Couldn't create temporary font file


From: azur
Subject: Re: [Swftools-common] PDF2SWF Error: Couldn't create temporary font file (swftools 0.9.2)
Date: Mon, 18 Jun 2012 00:45:46 +0200
User-agent: Mozilla/5.0 (Windows NT 5.1; rv:12.0) Gecko/20120428 Thunderbird/12.0.1

Attached a test szenario with a shell script to reproduce the
"Couldn't create temporary font file" - Error.
(present in 0.9.2 if no delay param given, not present in 0.9.1)

You are right, it is a specific usage scenario, which causes the error
to appear, but i can't see anything generally wrong with calling a
command in parallel and as fast as possible, whatever the cause is to do
that.

Test also demonstrates the cause for creating two sets of swfs from one
pdf. swf is vector format, but not all pdf content always is, depending
on the images embedded there is a notable difference in size (->download
and animation speed) between the small thumbnail swfs and the full
resolution required for full screen reading.


Regards,

Thomas


Am 17.06.2012 20:36, schrieb List_Subs:
> Thomas,
> 
>> On Sun, 17 Jun 2012 17:34:13 +0200
>> address@hidden wrote:
> 
>> Why do I wish to run several processes of pdf2swf on the same file?
>>
>> In my app pdf2swf is used to creat very small thumbnail previews and
>> higher resolution swfs for a pdf viewer, thats why i start pdf2swf
>> twice on every new pdf input file.
> 
> Since swf is a vector graphic format, tell me, what is wrong with doing
> the conversion once, then simply resizing the resulting file?  Would
> that not be a much simpler and less resource instensive way of doing it?
> 
>> Meanwhile further tests revealed, that the error is not limited to
>> processes working on the same file, it occurs always and reproduceable
>> if pdf2swf processes are started and backgrounded nearly in parallel,
>> even if they all work on different input pdfs.
> 
> I think you slightly missed the point I was trying to make.  That the
> issue seems to exist with the creation of those temporary files, whatever
> they be.  Several processes trying to create, write to, or oherwise
> manipulate the same set of temporary files at the same time, is a recipe
> for disaster.  That's not multitasking, that's just chaos!
>  
>> Such a scenario is likely to happen more often, as more app instances
>> try to utilize pdf2swf, so imho this is a real issue to be solved.
> 
> IMVHO, I still think this issue is a direct result of what you trying
> to do, and the way that you are doing it, not what pdf2swf is doing.
> How about an example? ;o)
> 
> Regards,
> 
> 
> Chris.
> 
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Attachment: pdf2swf-test.tgz
Description: application/compressed


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