@zambelli: Thanks, must have missed your previous post. So is setting g_wszInterlacedCoding to TRUE on the IWMWriterAdvanced2 interface of the writer when VideoType!=0 enough to support it?
(or do I also have to SetProperty WM_SampleExtensionGUID_ContentType on the INSSBuffer3 to WM_CT_INTERLACED, WM_CT_BOTTOM_FIELD_FIRST, WM_CT_TOP_FIELD_FIRST, etc ? )
-Nic
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