I am making a small video file player using FLTK+openGL+openCV.
At first, the program can play video normally, but after some time, it becomes
very slow. Can anyone help me out? 
OS: Windows XP  FLTK:1.3  openGL:3.3.0  openCV:2.3.1
My program include 5 files.
OBPM.cpp: main entry
OBPM_UI.h : GUI interface header file
OBPM_UI.cxx:  GUI interface source file
VideoGLWin.h:  a openGL window including zoom and pan function
VideoGLWin.cxx 

The following are the source code of the above files.
(I dont know how to upload the total project files, if you want, pls send e-mail
to yinjilong-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org )