a question of the function "VideoInputFrameArrived"

There is a on the function of " VideoInputFrameArrived ", the video and audio is come in one by one, but when the function execution process takes too long, this sequence would be a mistake, but also cannot reply, it will be in accordance with the 27 frame of video, 1 audio frames to the order data, if this occurs how to deal with, in addition to stop, at the beginning of acquisition methods, there is no other way to correct this mistake