[Winpcap-bugs] WinPCAP on Vista interferes DirectShow

[Gianluca Varenni]

Torsten,

I'm very sorry to hear this. Is there any way I can simulate this weird behavior on my Vista machines? Do you have any test application I can use to understand what's going on?

Have a nice day
GV

  ----- Original Message ----- 
  From: Torsten Jaekel 
  To: winpcap-bugs at winpcap.org 
  Sent: Wednesday, November 21, 2007 3:50 PM
  Subject: [Winpcap-bugs] WinPCAP on Vista interferes DirectShow


  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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