SWF conversion in images sequency (JPGs, GIF, MNG...)

Question

Hello,
I have some SWF files to convert in MNG animation or images sequencies.
(my developped software does not support SWF files. Alas!).
To do that, I am looking for a reliable tool allowing either:
- to convert SWF in MNG,
- or to extract sequencies of pictures (PNGs, JPGs...), in order to build a MNG file after this step (thanks another soft).
The SWF durations are 4s-8s, at 12fps.
They are composed by just a frame (which is containing some images which are moving in loop; no interactive content).
I tried to export an animation file with Adobe Flash CS4 with a SWF file, or a FLA file : it has not been successful.
I tried some tools which seems working by 'screenshots' of the SWF frame : I have some results, but not very good.
I do not have the Flash project which has been used to create SWF, but I can ask to my SWF provider some additionnal files which could be useful for my need (he is not an expert).
So, I do not have any solutions for that (Adobe tool? Another?).
Thanks for you help.

Answer 1

Here's what my .htaccess file looks like. Don't know if it makes a difference, but all the rewrite engine commands are within an IfModule tag.
<IfModule mod_rewrite.c>
RewriteEngine on
# This condition would allow access from no referrer
# Remove the hash if needed
# RewriteCond %{HTTP_REFERER} !^$
# Allow access from mydomain.com and www.mydomain.com
RewriteCond %{HTTP_REFERER} !^http://(www.)?mydomain.com/.*$ [NC]
# Allow access from mydomain.com and www.mydomain.com on port 12854
RewriteCond %{HTTP_REFERER} !^http://(www.)?mydomain.com:12854/.*$ [NC]
# file types to control
RewriteRule \.(gif|jpe?g|png)$ - [F]
</IfModule>