配置文件中加入了
[OptionOverwrite]
thumb_builtin_enabled = 1
thumb_ffmpeg_enabled = 1
thumb_ffmpeg_path = ffmpeg
thumb_ffmpeg_exts = 3g2,3gp,asf,asx,avi,divx,flv,m2ts,m2v,m4v,mkv,mov,mp4,mpeg,mpg,mts,mxf,ogv,rm,swf,webm,wmv,mov
thumb_ffmpeg_seek = 00:00:01.00
thumb_libreoffice_enabled = 1
thumb_libreoffice_path = soffice
thumb_libreoffice_exts = pptx,docx