png2swf - Man Page

Takes a number of png files and converts them to a swf movie, one picture per frame.


png2swf [-X width] [-Y height] [-o file.swf] [-r rate] file1.png [file2.png...]


This tools converts png image files into an SWF animation. It takes any number of input pictures, and converts them to SWF one-by-one, where every converted picture is a seperate frame in the target SWF.

The way the images are encoded in SWF is very similar to PNG (in that a zlib-based, lossless compression algorithm is used).


-r,  --rate framerate

   Set movie framerate (frames per second)

-o,  --output filename

   Explicitly specify output file. (Otherwise, output will go to stdout / output.swf)

-j,  --jpeg quality

   Generate a lossy jpeg bitmap inside the SWF, with a given quality (1-100)

-z,  --zlib zlib        

   Use Flash MX (SWF 6) Zlib encoding for the output. The resulting SWF will be
   smaller, but not playable in Flash Plugins of Version 5 and below.

-T,  --flashversion

   Set the flash version to generate

-X,  --pixel width

   Force movie width to width (default: autodetect)

-Y, --pixel height

   Force movie height to height (default: autodetect)

-v,  --verbose level

   Set verbose level (0=quiet, 1=default, 2=debug)

-q,  --quiet

   Omit normal log messages, only log errors

-C,  --cgi

   For use as CGI- prepend http header, write to stdout

-V,  --version

   Print version information and exit

-s,  --scale percent

   Scale image to percent% size.


Matthias Kramm <>


February 2012 swftools