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.
List of issues#2166 Shape opacity
Author: 
modder69
modder69Date created:
Type: question
Visibility: Everybody
Assigned to:
State: opened 
How do I edit shape opacity when added them to a sprite?
1) You must add it via PlaceObject2 or later.
2) You must enable placeFlagColorTransform flag
3) Then you can edit colorTransform field, enable hasMultTerms inside it
4) set redMultTerm, greenMultTerm, blueMultTerm to 255 (it's multiplier of 1.0)
5) set alphaMultTerm to whatever transparency you like 127 = 0.5, 255 = 1.0
placeobject2_set_opacity.png (10 KiB)State: new→opened
Thank you <3