SDK3 - mplayer stuck

Product: [Bebop2]
Product version: [X.X.X]
SDK version: [X.X.X]
Use of libARController: [YES] (Only for ARSDK)
SDK platform: [Raspberry Pi Raspbian]
Reproductible with the official app: [Not tried]

I am currently using Raspberry Pi 3B+ Model to install the SDK. However, after I launch the mplayer for few seconds, the mplayer screen becomes frozen. May I know the reason behind this? Thank you.