swf2js.js

swf2js.js is a JavaScript FlashPlayer emulator that analyzes SWF files of Adobe Animate (Flash) in real time and converts them to HTML.

Content

Background

Basic usage

Options

Examples

Known problems

Information

Background

This version of swf2js is an adaption based on swf2js.js version 0.7.8 from https://github.com/swf2js/swf2js.com/blob/master/assets/js/swf2js.js

swf2js.min.js is the minified version created with [Google Closure Compiler)(https://developers.google.com/closure/compiler).

Added support for sounds and soundstreams

• Sounds : mp3, raw (wave), ADPCM, NellyMoser.
• Soundstreams : mp3, raw (wave), ADPCM.

Warning : no support for Actionscript 3 which is introduced in Flash Player 9 (initially called 8.5).

Newer swf-files (version 9 and up) will probably still work, if you didn't useActionscript 3

If you have (or can find) Flash MX 2004 or Flash (Professional) 8, you can stil create sfw-files and use them with swf2js.js

Licenses for Adobe Flash can be found on https://helpx.adobe.com/en/x-productkb/policy-pricing/macromedia-legacy-activation-error.html

See https://github.com/swf2js/swf2js and https://swf2js.com/en/ for a commercial version that supports Actionscript 3.

Basic usage

<script type="text/javascript" src="swf2js.min.js"></script>
<script type="text/javascript">
    swf2js.load('SET SWF PATH');
</script>  

Options

Option	Description	Additional information
tagId	Place swf-player in element with tag 'tagId'
width	Set width of swf-player
height	Set height of swf-player
callback	Function to be called when swf-player has loaded the swf-file
FlashVars
quality	Values : "low", use devicePixelRatio*0.5 or "high", use devicePixelRatio	See devicePixelRatio
bgcolor	Set background color

Example usage of options.

function informMe(arg) {  alert("informMe : swf-file loaded"); }

swf2js.load('tiger.swf', {tagId: "swf_instance", width: "320", height: "320", callback : informMe, bgcolor: "black"});

See example_options.html

Examples

Examples

Animated music

Known problems

• More than one swf-file in a page does not work properly.
• Obviously Adobe FlashPlayer knows the exact frame size, even if bigger than the specified framesize in the header.
  See examples : mogura and PlayPauseStop5
• Video (mp4 and flv) not supported.

See also https://swf2js.com/en/#skills for the differences between the free and the commercial version.

Information

SWF FILE FORMAT SPECIFICATION VERSION 19 at https://www.adobe.com/content/dam/acom/en/devnet/pdf/swf-file-format-spec.pdf

This gives information on the internal format of swf-files, but no information how Adobe FlashPlayer uses (was using) it to display the content.