[M4IF Technotes] why there are no P/B RC?

[zhweizh]

Hi,
   when I am using Momusys(18VM) to encode a video, 
  the following is my encoding parameters:
      encoding type: I B B P B B P B B P B B I
      video:         coast_cif.yuv
      VO:            1
      RC:      VM5+  (Q2)
      farme rate:   30p/s
      Rate:         400,000bps
 But the problem is that only first P frame with MB level rate control, and all remain P and B without MB level RC.
 I donot know why!!
 I need your help, please!!!
¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡zhweizh
¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡zhweizh   mailst.xjtu.edu.cn
¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡2003-06-19