Re: WMEncoder.Reset Hangs

Tech-Archive recommends: Repair Windows Errors & Optimize Windows Performance

From: Dan Schullman (newsuser_at_westerville.ohmy)
Date: 03/16/04 

Date: Tue, 16 Mar 2004 11:01:32 -0500

K,

> I've read a couple of posts from Dan Schullman which seem to have a
> very similar problem but there aint any solutions posted. Can anyone
> help me about it...

FYI, I had managed to very reproducibly get the WMEncoder.Reset() call to
hang for 30 seconds, though what started me/us down this path was indefinite
(infinite?) hangs that we saw very rarely. Eventually opened up a Microsoft
case, and after numerous weeks and attempts to further isolate it by both
parties, Microsoft confirmed that the 30-second hang was a bug. I'm not sure
how to characterize the bug, though I know that Microsoft found that there
could have been other symptoms as well (for example, access violations, COM
exceptions) and that it could fail with other methods on other WM objects.
In my test scenario, it looked like creating the WMEncoder object from
something other than the primary thread was a problem, though that might be
the wrong conclusion/inference.

I suggest you open up a case about it yourself. I figure the more people
that stumble on and report this problem, the more likely it is to get fixed
anytime soon. We've not yet done anything to work around the problem, as 1)
we don't know how much exposure we've got with this bug, 2) I'm not sure
that we've got a workaround, and 3) I fear that a workaround (if any) would
require a significant restructuring of our current code.

By the way, sorry for the delay in getting back to you. I'm not a "regular"
newsgroup reader... only when I get desperate.

Good luck!
  Dan S.

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