[Winpcap-bugs] WinPCAP on Vista interferes DirectShow

[Torsten Jaekel]

Hi WinPCAP team,
 
I have tested again and studied the problem on Vista 32 bit and
capturing with WinPCAP.
I have trouble to use it in combination with VLC, Windows Media Center
or any other DirectShow application.
I am pretty sure now, that the WinPCAP kernel driver disturbs kernel
streaming drivers, DirectShow filters.
 
My test environment:
- I receive IP packets with MPEG-2-TS on a RNDIS adapter
- I capture on this RNDIS interface
- it works fine if:
    - I write the captured data into a file (not streaming via UDP to
localhost, e.g. in order to decode with VLC)
        -> TS file is error free and can be decoded with VLC (offline,
as file)
    - I stream the captured TS packets as "TS-via-UDP" to another PC
        -> TS file is received on remote site error free, VLC can
receive UDP and decode
    - I stream the captured TS packets as "TS-via-UDP" to my own PC, to
localhost and record it with VLC
      into a file BUT without to decode and display the video (silent
VLC)
        -> TS file is error free and can be decoded as file (offline,
see above)
 
It does NOT work if:
- I stream to localhost and let VLC receive AND decode, display
- I send the data to a BDA minidriver and use a DirectShow application
or Windows Media Center to decode
 
I thought before it is the fact, that you have on Vista a Loopback
device which you see as adapter on WinPCAP and you could open it.
But it is not this issue.
 
It seems to be related only in combination with DirectShow or such
kernel streaming drivers.
I hope it helps you and other user (unfortunately WinPCAP does not have
any value for me anymore, sorry, not useable on Vista).
 
Many regards
 
Torsten
 

_______________________________________ 



Torsten Jaekel

Broadcom Corporation
Call: +49 30 30 649 396
Direct: +1 949 926 8016
Cell: +49 174 94 33 716
Email: tjaekel at broadcom.com 

 
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