Movie sync doesn't work good

[KILDONG]

http://youtu.be/SHH_QQRt_i0
This sample movie made with ppsspp 0.8.1-1173. all frame speed very good.

http://youtu.be/SppvXdDhMuY
This sample movie made with ppsspp 0.9.1-83. sync poor and speed change 95~110% up.

Especially point 9 second , 21 second, 41 second.

All option default, and this problem appear game "super robot taisen z2 hakai hen tljs00379",
"sorano woto uljm05673" , etc....

First sample movie run with 40 frame in ppsspp, capture with 30 frame

Second sample movie run with 30 frame in ppsspp, capture with 30 frame

I Don't know why running framerate different, All option is default in ppsspp. but fraps showing me different fps.