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#1676 Movie/Video preview not working
Author: 
leo_os
leo_osDate created:
Type: bug
Visibility: Everybody
Assigned to:
Labels: Flash ViewerVideo
State: closed 
> What steps will reproduce the problem?
Clicking on a movie/video inside the movies folder, which makes the preview show up.
> What is the expected output? What do you see instead?
Expected output: a preview of the selected video
What I see: I get the error message "Preview of this object is not avaliable on this
platform (Windows only).", despite running on Windows.
> What version of the product are you using? Is it "nightly build"? Which operating system
do you have?
Decompiler: v.14.3.1 stable
OS: Windows 10 Home, running update 20H2 (although the error was already occuring back
when I used updates 19XX).
> Please provide any additional information below. If the problem is related to a SWF
file, attach it here, otherwise we can't help you.
Possibly caused by me missing a codec?
I modified the message in nightly 1917.
The truth is that our flash viewer cannot display movie tags.
These can only be displayed by actual Flash Player - ActiveX component or standalone flash
projector.
You can try enabling activeX compoment in "Advanced Settings / Other / (Deprecated) Use
Adobe Flash player for preview of objects", but this probably won't work, since Adobe
blocks ActiveX in Windows10.
I thought about it and we could probably make a button which will open external flash
projector with the preview, so stay tuned...
State: new→opened
In nightly 1918,
I added option to view video tags in external flash projector.
You should see a button in there.
State: opened→upgraded
Yup, just tested it. Working nicely. Thanks!
You're welcome.
State: upgraded→closed
Good news!
In nightly 2306,
you can properly display frames with video and DefineVideoStream tag right in the FFDec.
Only thing you need is VLC media player installed.
State: closed→upgraded
State: upgraded→closed