VideoInfo2 Format Type

A preview pin might prefer a media type with a VIDEOINFOHEADER2 format. This format supports special features such as non-square pixels and interlaced video (field-based video, rather than frame-based video). The Overlay Mixer filter supports this format.

To take advantage of these features, do the following:

1. Enumerate the pin's preferred media types, using the IPin::EnumMediaTypes method.
2. Check the first media type in the enumeration sequence.
3. If the format type GUID is FORMAT_VideoInfo2, connect the pin to the Overlay Mixer. Then connect the Overlay Mixer to the video renderer. (See Video Port Pins.)

If you do not care about these features, you do not have to use the Overlay Mixer.