Ross-
Sorry you haven't gotten the help you need...
Please fire me an email and I'll get you in contact with the right person... Rob.Relyea at microsoft dot com
Thanks, Rob Relyea
Program Manager, WPF Team
http://rrelyea.spaces.live.com
A couple things to check:
Does it work in graphedit (via render file)
What are the media types the filter is using
Do you get anything in the MediaFailed event
I had developed a custom filter and found I needed some more registry keys to make it work in the media element:
[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Multimedia\WMPlayer\Extensions\.anet]
"Permissions"=dword:0000000f
"Runtime"=dword:00000007
Check if those keys exist for your filetype and if not try adding them for the file extention you are using.
Another good resource is using the sys internals registry monitor, that is what I used to find out I needed the above keys.
--nick
MediaElement uses the EVR with a custom IMFVideoPresenter.
I'm not sure what kind of debugging support you're looking for, but how about loading your app in a debugger, setting the debugger to break when the filter dll is loaded, then setting breakpoints to see if the filter is successfully connected to DirectShow
I may be able to help from the MediaElement side of things. If you think the filter is connected successfully and the problem lies within MediaElement (and Nick's suggestions don't help), email me at tmulcahy at microsoft dot com.
Now I have a question...
I thought the EVR only existed on Vista. How does that work on XP
Thanks.
Does it work in graphedit (via render file)
>What are the media types the filter is using
>Do you get anything in the MediaFailed event Nothing. No exceptions, no mediafailed.
>I had developed a custom filter and found I needed some more registry keys to make it >work in the media element: >[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Multimedia\WMPlayer\Extensions\.anet]
>"Permissions"=dword:0000000f
>"Runtime"=dword:00000007
The filter by the way is this one (just in case you ever want a DVB-T filter) http://www.dsp-worx.de/ n=11 - The author claims it is alpha but it is rock solid on all of the cards we've tried it on. Obviously we can host in WMP, but if I can get it working in MediaElement then I can have all of the overlay niceness that I currently have (with alpha'd tickers over fading-in video).
I'll let you know, and failing that I'll drop Tom a line. WPF is a fantastic solution for Digital Signage and if I can get this working it could be on a few thousand displays soon (ish).
On a related note, whoever decided that the MS Press book on Directshow should be Out of Print should be told off - sternly :(
Another suggestion: Have you tested the filter for compatibility with the EVR
In GraphEdt, you can remove the VMR that you probably have hooked up and replace it with the EVR.
I may be wrong, but I think the EVR only supports Windowless/Renderless modes, meaning it won't display output without having it's configuration interfaces setup and thus won't display anything in GraphEdit.
If you really want to test the filter with the EVR, you'd have to write some code.
--nick