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Pictures, GIFs, jpg and other formats are all acceptable.
Video, wmv, mpg, flv and other formats can be used.
Import method: (the method of importing pictures is similar to sound) file >; Import > import to the stage, and then find the picture you want to import before performing sound effects.
The method of importing video is, File >; Import > import video, select the video to import, and then make simple settings.