The Remote Desktop Protocol Video Redirection Virtual Channel Extension operates only after the dynamic virtual channel transport is fully established. If the dynamic virtual channel transport is terminated, no other communication over this protocol extension occurs.
This protocol is message-based, and it assumes preservation of the packet as a whole and does not allow for fragmentation. Packet reassembly is based on the information provided by the underlying dynamic virtual channel transport. This document assumes that packet chunks have already been reassembled based on that information.