the skeleton shake use camera

[xyodfish]

i use comman "somehand webcam" to start the demo, it seems like the skeleton showed in the browser shake at high freq. The demo
pico_right.pkl looks normal with no obvious shake

[BotRunner64]

@xyodfish webcam调用的mediapipe的单目手部姿态估计接口，这个姿态估计确实是很抖。demo的是pico4 VR的手部姿态估计，这个不抖