Using shm for record and rtsp,but when the record start the rtsp is not stream

[bld]

       I am using shmsink for share the source,but it seem to be not worked,I start the rtsp streamer first,and it work,then I start record ,and it works too ,but at the same time, the rtsp streamer is not data. At last,when the record is finished,the rtsp work again too.What's the problem ? anyone help ?
       Thanks!