Filter: block TS buffer data from socket receiver

[dvb_dvb]

Hello! I have problem with buffer play of mpeg-2 or h264 video,
Filters:
1, buffer source filter: bufSourc.ax
2, Elecard MPEG Demultiplexer DS Filter: empgdmx.ax : file version 1.3.12109.0
3, AVC/H.264 Video Decoder: mcavcvd.ax, file version 3.0.7299
bufSourc.ax has only one interface: AddTsBuffer(…)
The first:
I use socket, receive Ts buffer, call this interface, play. But after thirty minutes, that TS Demultiplexer call get buffer is very slower than normal. It lead to my sample buffer list is full, no free buffer node. At last, I have to discard some TS buffer until to (the buffer list has a free node).
The second:
Use read local file, call this interface, play. But after thirty minutes, the same problem can be found out in log file.
Why it is well in thirty minutes, then it badly block net TS packet.