Recompress your Flash 11 SWFs with LZMA

Flash 11 can load SWFs that have LZMA compression; previously SWF contents were either uncompressed or zlib-compressed.

Since the mxmlc compiler doesn't yet support this compression, and since it was a PITA to compile Tinic Uro's zlib2lzma on anything but Windows (http://blog.kaourantin.net/?p=124), and since no one else seems to have done it... I wrote a Python script to do the conversion. Woot. It only requires that the input SWF be compiled with -swf-version=13 (or higher). It will fail if you feed it an LZMA-compressed SWF -- feel free to fork me on GitHub and fix that.

Usage: python swf2lzma.py in.swf out.swf

Grab the code from: http://github.com/jspiro/swf2lzma


Breakdance McFunkypants said...

Fantastic work! Thank you - your efforts are appreciated.

Will Jordan said...

Thanks very much for this script, it's very much appreciated! I've run across a problem where it doesn't work on a legacy Python 2.4 installation (which is the only version available by default on a CentOS 5.4 virtual machine I'm working with), because the 'bytearray' global isn't available until a later Python version. Any ideas on how to adjust this script to work without this more recent feature, or is this particularly necessary?

Jono Spiro said...

Unfortunately I don't know how to modify it to work with earlier versions of Python. But you should fork me on github if you come up with one!

I am not a Pythonista so I was just working with what I could find on the nets :)

Will Jordan said...

Spent a bit of time with it this morning and got something that works in Python 2.4. Sent you a pull request on GitHub~

SARANG said...

I am using Python 3.3.2

I tried to execute command

python swf2lzma.py Main.swf outputMain.swf

got following error:

File "swf2lzma.py", line 50
print 'compression: %d%%' % round(100 - (100.0 * zsize / swf_size))
SyntaxError: invalid syntax

Please help on this

Anonymous said...

Wau man. My gratitude!!
Awesome work, we're using it in our game now.
Feel free to drop at infinitugame.com and ask for "warp".