In this paper we propose a mixture video transcoding method with limited drifting error for H.264 bit rate reduction transcoding.Casacaded pixel-domain architecture is selected to transcode an intra frame and open-loop architecture is selected to transcode the inter frame.At the same time，drift error compensation operation is implemented for the inter frame.Experimental results show that using this video transcoding architecture，the picture quality obtained from the proposed transcoder is close to that of the traditional cascade pixel-domain transcoder，while the transcoding speed is close to the open-loop architecture video transcoder.