filter to change personalilties

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2.Problems with timecode Date Unit Extensions when changing WMAsf writer filter profile

Hello,

I have an application that is capturing DV and transcoding to WM9.  I
am using DirectShow to achieve this and am using the WMAsf Writer
filter to do the WM9 encoding.  As part of the encoding process I am
embedding the DV timecodes into the WM9 file using the IAMWMBufferPass
Notify method.  Under normal circumstances everything is working OK.


We allow our customers to specify whether they want to include audio in

the encoded media.  I am configuring the Wm Asf writer filter using one

of 2 profiles... one that contains audio and the other doesn't.  After
loading the desired profile I am modifying the video stream to add the
timecode DUEs using the StreamConfig2 AddDataUnitExtension method.
When I initially set up the graph and the WM Asf Writer filter
everything works OK with either profile.


It is desirable to allow our customers to change their audio encoding
preference after the system is up and running and this is where the
problems start.  When the customer toggles his audio encoding
preference I go thru the following steps to change the WM Asf writer
filter.


1.  Using filter graph's IMediaControl interface stop the graph
2. Disconnect the ASF writer's video pin
3. Disconnect the ASF writer's audio pin (if the original profile had
audio in it)
4. Load the new WM9 encoding profile, add the timecode DUE to video
stream and Configure the WM Asf writer filter using it.
5. Reconnect the ASF writer's video pin
6. Add the buffer pass callback to the video pin
7. Connect the audio pin (if new profile has audio)
8. Restart the graph running


At this point when I start to process video samples I get one or two
calls into the callback Notify method and then no more.  The graph
continues to run but no samples get encoded and written into the ASF
file.  Attempts to open the resulting ASF file in the Windows Media
player fail.  The file size is usually less than 100kB no matter how
long the encoding went.


If I follow this same procedure for resetting the WM asf filter's
encoding parameters without configuring the writer to include the
timecode in the output everything works fine.  So it appears that
having initially configured the filter to add the timecode DUEs has
somehow caused my reconfiguration logic to break.


Is there something I need to do to disable addition of Timecode DUE's
prior to resetting the encoding profile?


Any help in resolving this issue would be greatly appreciated.  Thanks
in advance for your time!

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5.Change Webpart view filter at runtime

Dear all



Does their exist the possibility to change the filter-options of a webpart
on design time, before rendering of the webpart?
I try to build a view that contains the documents modified in the last
x-days. Unfortunatily you cannot use a formula in the filter of a view :-s
Just a static date.

You can see the date in the xml that is placed in the aspx webpart page..
but you cannot edit it at runtime, isn't is? Or am i missing a possibility?


Somebody any experience in this?



Kind regards
Frederick D'hont
Amplexor.com

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