Text Over Video...

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Hello all,
I have created a filter which writes a text over the
video(using some Text Functions of WIN32) in a DES application.

This filter works fine if i render a media file. i am able to see the
text floating over the video.
i want to use this filter as a effect in DES. I set the GUID of the
filter to the TimelineObj's SetSubobjectGUID function, but seen nothing
in the output.

my question is whether i can use the filter as a effect or not.
if it is not possible what are the other ways to add the text to the
timeline.

thanks in advance.

.

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