That's E_FAIL which is sad.

On my clean / pristine system, MJPG plays back fine. You don't need
pvmjpg30.dll to play this. FFDShow does have an MJPEG decoder, but that's
replacing the built-in DirectShow MJPEG decoder that's part of Quartz. If
you open up graphedt.exe (not on your system), you can go to Graph : Insert
Filters : Video Compressors and you should see MJPEG decompressor under
there.

--
Speaking for myself only.
See http://zachd.com/pss/pss.html for some helpful WMP info.
This posting is provided "AS IS" with no warranties, and confers no rights.
--
"John Hanley" <jphanley@ix.netcom.com> wrote in message
news:OjtqvwHZIHA.1532@TK2MSFTNGP04.phx.gbl...
> Zach -- The URL that Web Help takes me to is:
> http://www.microsoft.com/windows/win...nalid=80004005
>
> PapaJohn -- the pvmjpeg30.dll file is not in my System32 folder or
> elsewhere
> on my hard drive. I googled a bit for it and there are references to
> 'pvmjpg30.dll' (without the e), but that is not on my hard drive either.
> The main reference is to a site for
> Pegasus Imaging and they call it PICVIDEO and they want $39 to download
> it.
> Are you thinking it is something that should have come with WMP Microsoft?
>
> "PapaJohn" <papajohn@chartermi.net> wrote in message
> news:OcS%23ZyGZIHA.4284@TK2MSFTNGP03.phx.gbl...
>>I agree that a fix is better than a work-around... if I take my ffdshow
>>codec out of the picture, MJPEG files still play.
>>
>> WMP plays them with pvmjpeg30.dll file in the system32 folder... check
>> that it's there and try re-registering it in case it slipped a gear.
>> --
>> website references are to www.papajohn.org
>>
>> PapaJohn
>>
>>
>> "zachd [MSFT]" <zachd@nomailplz.online.microsoft.com> wrote in message
>> news:uTawOgGZIHA.1212@TK2MSFTNGP05.phx.gbl...
>>>
>>> What's the URL that Web Help takes you to?
>>>
>>> There's already an MJPEG codec on the system. It should work.
>>> PapaJohn's suggestion might help you replace it if needed though, but
>>> that shouldn't be needed.
>>> AVI vs avi doesn't matter - the system is case-insensitive here.
>>>
>>> --
>>> Speaking for myself only.
>>> See http://zachd.com/pss/pss.html for some helpful WMP info.
>>> This posting is provided "AS IS" with no warranties, and confers no
>>> rights.
>>> --
>>> "John Hanley" <jphanley@ix.netcom.com> wrote in message
>>> news:esWycIFZIHA.4896@TK2MSFTNGP06.phx.gbl...
>>>>I have a Canon S3IS digital camera which can take movies. The movies
>>>>show
>>>> an .AVI extension and (I think) use an MJPEG codec. After
>>>> transferring
>>>> the
>>>> movie files to my (Vista) hard drive, their behavior is erratic:
>>>>
>>>> - The movie files *will not* play in Windows Media Player. The WMP
>>>> error
>>>> message is: "Windows Media Player encountered a problem while playing
>>>> the
>>>> file". Clicking on Web Help reveals: "You've encountered error message
>>>> C00D11B1 while using Windows Media Player."
>>>>
>>>> - The movie files *will not* play in Windows Media Center; WMC says
>>>> "Cannot
>>>> Play Video - Windows Media Center cannot open the file".
>>>>
>>>> - If I import the files into Windows Movie Maker, WMM appears to play
>>>> them,
>>>> but the preview screen is black.
>>>>
>>>> - GSpot reports that the file is a Motion JPEG, and that "Codec(s) are
>>>> Installed".
>>>>
>>>> - The movie files *will* play using Canon's ZoomBrowser EX program
>>>> (came
>>>> with the camera).
>>>>
>>>> Related Info:
>>>>
>>>> - Both WMP & WMC play my .wmv files just fine. I also have one .avi
>>>> file from a different source which plays fine.
>>>> - The file extension on the AVI files that will not play is .AVI
>>>> (capitalized); the file extension on the avi file that will play is
>>>> .avi
>>>> (lower case) -- probably does not matter?
>>>>
>>>> Will appreciate clues on where to look to solve the issue. Thanks.
>>>>
>>>>
>>>
>>>
>>
>>
>