The file format spec is available:
https://www.adobe.com/devnet/swf.html
I know it isn't the same as "Open Sourcing" the Flash Player code, but it is how many programs--Camtasia as one example--have/had an "export to Flash" option.
https://www.adobe.com/devnet/swf.html
I know it isn't the same as "Open Sourcing" the Flash Player code, but it is how many programs--Camtasia as one example--have/had an "export to Flash" option.