LG 42LB5800 請問這台我有看到支援RMVB可是為什麼不能播

USB

Divx (SD/HD/Plus HD)
Picture
External Device App Download
Audio Codec
Subtitle for DivX
DivX HD, RMVB 我看這邊他有支援RMVB為啥放隨身諜搜尋不到RMVB檔
JPEG
Yes
AC3(Dolby Digital), EAC3, HE-AAC, AAC, Mpeg, MP3, PCM, DTS
Yes (Chinese / English)