The Macromedia Flash file format (SWF) (pronounced "swiff") delivers vector graphics and animation over the Internet to the Macromedia Flash Player. For more information regarding Flash, please see our General FAQ.
The Macromedia FLV file format lets you import a static video stream with encoded audio.
The SWF files produced are compatible with Flash Player version 6 and up. If you are publishing Projector files, the Flash Player is not needed, and thus the minimum Flash version is irrelevant.
Flash will not import SWFs completely that contain audio, video, and actionscript. If you want to import your Flash video, you should encode the video as a FLV file instead of a SWF.
If running Windows, install or re-install the latest QuickTime with the "Recommended" Installation option checked.
The Flash player imposes a 16,000 maximum frame limit on SWF files. Anything beyond this will not be displayed. So the actual maximum duration will depend on the frame rate used for the SWF file (10fps = ~26 minutes).
Flash FLV files however do not have this 16,000 frame limit.
If you are exporting as SWF, you will need to split up the video and chain the SWFs together by adding a End Movie Action which will load in the next SWF file.
If you are exporting as a FLV file , there isn't any 16,000 frame limit.
Yes, it is possible to create your own custom Players and add them for use in Audio2SWF. You will need to use Macromedia's Flash authoring tool and follow our specification for creating Players for Audio2SWF.