Picture file processing method, device, and storage medium

A picture file processing method is provided. The method includes determining, by a computing device, during a process of encoding transparency data of a picture, transparency input values according to the transparency data of the picture. The method also includes encoding, by the computing device using a video encoder, the transparency input values as data of a preset target channel of the video encoder, to obtain transparency stream data of the picture; and encoding color data of the picture, to obtain color stream data of the picture. The method also includes outputting, by the computing device, compressed image data of the picture. The compressed image data includes the transparency stream data of the picture and the color stream data of the picture.