Setting video /audio buffer time in DirectShow

I have a source filter (rtsp source filter). I can set its video/audio buffer time in graph edit. But do not know progr开发者_运维知识库amatically how to set.

Does any body know a generic mechanishm which i can set a buffer time for an (live) source filter?

Best Wishes

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if you save the .grf file it saves settings I believe. DirectShow - passing parameters to custom source push filter might help