directshow H.264 encoder which never cause memory leak - directshow

Question

I'm developping H.264 capture application executed on Windows XP SP3(32bit).
The application cause memory leak when I implement Capture Test
(I'm checking Virtual Size colum of "Process Explorer").
When I change directshow encoder filter, amount of leak is changed.
So I'm suspecting directshow H.264 filter(encoder or multiplexor or both) as the cause of the memory leak.
Would you please tell me if you have heard "Free" directshow H.264 filter which never cause memory leak?
---- Follow up 2015-07-09 ----
I execute the application on WindowsXP: leaked
I execute the application on Windows 7 : not leaked
Are there any difference related to memory allocation/free between XP and 7...?
---- Follow up 2015-07-10 ----
I checked constructed graph on WindowsXP and Windows7 using GraphStudioNext.
H.264 Encoder : the same CLSID between WindowsXP and Windows7
H.264 Multiplexor : the same CLSID between WindowsXP and Windows7
Now I have attempted the H.264 filters below.
H.264 encoder: ffdshow_rev3572_20100913_clsid, AX_components H264 encoder, x264vfw
H.264 multiplexor: GDCL-H.264Multiplexor(updated 05 Jun 2015)
On both platforms, graph is below.
[USB Camera]---->[Smart Tee]---->[H.264 Encoder]---->[H.264 Mux]--->[File Writer]
matter of concern:
In GraphStudioNext's Filter Propaties, WindowsXP using quartz.dll,
but Windows7 using proppage.dll. Is this difference important..?
On Windows XP, ALLOCATOR PROPATIES are exists, but 7 are not exists.