> the capabilities of the device. One of the bits is VID_TYPE_CHROMAKEY, > described in the doc as "Overlay is Chromakeyed". > > What does this mean, and how would it be useful? > Does it relate to the chromakey value provided to the VIDIOCSWIN ioctl? It tells you that you need to provide a chromakey value and paint blocks of screen for doing overlaying Right now I believe the only chroma key driver is the temporary magic driver for the matrox g200 yuv scaler
