A media file processing method is described. Multiple selected media files are processed by a terminal device comprising a processor and a memory storing computer readable instructions executed by the processor. The terminal device extracts content association information corresponding to the multiple selected media files. The terminal device further synthesizes the multiple selected media files according to the content association information to obtain an animation that is a dynamic presentation of contents of the multiple selected media files. The animation is then stored in a predetermined file format in the terminal device.