Re: [Swftools-common] buggy pdf2sw conversion?

[Ricardo Pedroso]

2011/2/12 Pablo Rodríguez <address@hidden>:
> On 02/12/2011 12:10 AM, Chris wrote:
>>
>> On Fri, 11 Feb 2011 21:49:55 +0100 Pablo Rodríguez<address@hidden>  wrote:
>>
>>> And there is the issues that I cannot explain: why advancing slides is
>>> almost negligible and going back takes so long?
>>
>> I think I can.  The quote given below is from the page 29 of the SWF File
>> Format Spec v10:
>>
>> <snip>
>> 'The contents of the first frame are the cumulative effect of performing
>> all
>> of the control tag operations before the ShowFrame Tag ..'
>>
>> which is the point when you see the rendered result on-screen,
>>
>> 'The contents of the second frame are the cumulative effect of performing
>> all of the control tag operations from *the beginning of the file to the
>> second* ShowFrame Tag, and so on.'
>> </snip>
>>
>> Now you know why there is a massive delay.  It's a bit like having to re-
>> read all the currently read pages of a book, just to assimilate the next
>> one.  If it happens to be relatively large book ( file ), then not to put
>> a finer point on it, you are up jolly old this creek without the aid
>> paddle.
>
> Thanks for your patient explanation, Chris.
>
> But I'm afraid I miss something essential, because I don't get it.
>
> If frame displaying is cumulative, advancing frames should be slower than
> going back to previous frames, because there is (one or more frames) less to
> read. And this isn't the case.

No. As I understand when you go back the flashplayer need to read all the frames
starting from frame 1 until the one to be displayed.

Do the conversion of the pdf with:

pdf2swf -O1 file.pdf

or  -O2 or -O3

and see if that helps with the backward issue


Ricardo