PNG, Portable Network Graphics, just as its name implies, is an image format widely used on the Internet. Shockwave flash (SWF) is also broadly used for sharing videos on the Internet. If you want to convert frames of a SWF video to PNG images, the application VeryDOC Flash to PNG Converter will be a good assistant.

Before you buy a license for the function unlimited version of the application, you download it here for a free trial. You can make acquaintance of the application from the following screen snapshot. In the snapshot, you can see a table that is a file list. Those SWF files in the file list are for converting to PNG images. Drag your file from the Windows Explorer and drop them into the main interface form of the program to add new SWF files into the file list. Click on any item in the file list, the corresponding SWF video will be previewed in the preview area on the left side of the table. You can use the buttons under the preview area or right click in the table to add or remove items in the list.

Press [Options] to activate the "Options" dialog in the main form before the conversion. The "Options" dialog is like that presented in the next screen snapshot. In the group box "Basic Setting", choose "png" in the dropdown list of "Convert Format" to set the conversion target format as PNG. You can customize the size and orientation for you converted images in group box "Size and Orientation". The pair of input boxes of "Resize" are for resizing the width and height. You can inverse the converted images in both vertical and horizontal directions with checking the boxes of "Flip Image" and "Mirror Image".

Press [OK] in the dialog of "Options" to complete the setting and exit to the main interface form of the application. In the main form, press button [Convert] and then your videos are converted from SWF to PNG. Every frame of the videos will be converted to a single PNG image. The last snapshot is the effect of a PNG image converted from a source SWF video. You can see that the image is inversed in the vertical direction.