Portable Network Graphic, PNG, is a popular image format widely used on the Internet. Adobe Shockwave Flash, SWF, is also a popular technology broadly used in video broadcasting and online interactive service. You can convert your images of PNG to SWF videos using the tool VeryDOC PNG to SWF Converter.
The application PNG to SWF Converter is free to download for a trial. If you feel like using the full function of the application after evaluation, please buy a license for it. The look of the main interface window form of the application is presented in the first screen snapshot. You see that there is a table of file list in the upper left corner of the window form. The file list lists those images files waiting for converting to SWF videos. Buttons [Add Images], [Remove] and [Remove All] are for managing the items of the file list. Clicking any item of the file list will preview the corresponding image on the right side of the table.

Before converting your selected images of PNG to SWF videos, you may have to set some options of the conversion. In the main window form of PNG to SWF Converter, press [Options] to open the setting dialog as displayed in the next screen snapshot.

In tab [Basic Setting], you can set the frame rate in FPS, the width and height in pixel for the converted videos. In tab [PNG Image Setting], you can rescale the PNG image size before convert it to SWF by setting the argument value of "Scale" option. You can also control the quality of the PNG images via setting the value of "Quality" spin box. After setting the options, please press [OK] to save the options and exit to the main interface form.
In the main form, press [Convert], and then you will see a dialog requiring for a directory to save the converted videos. Select a directory to save the converted videos, and then your images are converted from PNG to SWF by PNG to SWF Converter. The last snapshot is the playing effect of a SWF video converted from PNG.