The crop region in <Crop>.
optional
channelId: number
Zero-based channel.
optional
topLeftX: number
Left edge of the region.
optional
topLeftY: number
Top edge of the region.
optional
cropWidth: number
Width of the region.
optional
cropHeight: number
Height of the region.
optional
mainWidth: number
Width of the main stream the region is measured in.
optional
mainHeight: number
Height of the main stream the region is measured in.
optional
subHeight: number
Height of the sub stream; written only.
optional
subWidth: number
Width of the sub stream; written only.
optional
version: number
A <version> child element, not the version="1.1" attribute; written
only.