ffmpeg就这几个函数：ffmpeg_movie：Theffmpeg_movieobjectprovidesmethodstoqueryandmanipulatemoviesandaudiotracks.ffmpeg_frame：Theffmpeg_frameobjectprovidesmethodstoqueryindividualframesfromamovie.ffmpeg_animated_gif：Theffmpeg_animated_gifobjectprovidesmethodstocreateanimatedgifmoviesfromaseriesoffram