If you are looking for the decompiler itself, visit https://github.com/jindrapetrik/jpexs-decompiler
NEW : We have got a new blog where we post some interesting SWF internals info.

#1817 PDF export recompresses embedded images unconditionally
Author:
dogtocat

Date created:
Type: bug
Visibility: Everybody
Assigned to:
Labels: PDF
State: closed 

> What steps will reproduce the problem?
Convert any SWF frames to PDF.
> What is the expected output? What do you see instead?
Some images types supported by PDF like JPEG/DCT should not be recompressed as a different
format, instead they are recompressed as PNG/Flate, inflating the size unnecessarily by
2-10x depending on the number of images included.
> What version of the product are you using? Is it "nightly build"? Which operating system
do you have?
JPEXS Free Flash Decompiler v.15.0.0
> Please provide any additional information below. If the problem is related to a SWF
file, attach it here, otherwise we can't help you.
None.
In nightly 2111, the JPEG images are not recompressed.
State: new→upgraded
State: upgraded→closed