我想在D　Stage上放一AVI文件，在当前帧循环，不知如何来控制当AVI播放完后才使播放头进入下一帧。
　　我用了sounbusy(1)想根据AVI的声音来判断其是否结束，结果不可行。

on exitFrame me
  if the movietime of sprite n < the duration of (the member of sprite n) then
    go the frame
  else
    go the frame+1
  end if
end
--n为通道号

on exitFrame me
if the movietime of sprite n < the duration of (the member of sprite n) then go the frame
end

Thank you for help me. I like director.