The size of the memory required for the image is returned by this function. If pitches and offsets are not NULL, these will be arrays with as many elements in them as there are planes in the image format. Most of this data is just informational and for the client's benefit, and is what will be reported by XvQueryEncodings . Initialization of an adaptor will fail if none of the visuals on that screen are supported. The min and max field specify the valid range for the value.
Name is a text string describing the attribute by name.
This is a unique descriptor for the format. This is XvRGB or XvYUV . This is the Globally Unique IDentifier for the format. This is XvPlanar or XvPacked . The number of planes in planar formats.