A local user equipment, UE (148; 204) operable to perform video conferencing with a remote UE 128; 202, the local UE having one or more processors configured to: define a region of interest, ROI (110;150); communicate the ROI (110; 150) to the remote UE (128; 202) via a real-time transport control protocol, RTCP, feedback message, wherein the RTCP feedback message instructs the remote UE to capture video within the ROI and encode the video within the ROI; receive the encoded video within the ROI (110; 150), from the remote UE (128; 202), the encoded video including regions within the ROI and excluding regions outside the ROI; receive actual transmitted ROI corresponding to the encoded video from the remote UE (128; 202) via a real-time transport protocol, RTP, header extension, wherein the RTP header extension is included in RTP packets that contain the encoded video, wherein the RTP header extension includes a position and a size that define the actual transmitted ROI, wherein the position comprises two position values within the field of view at the remote UE, wherein the size comprises two size values indicative of a size of the ROI within the field of view at the remote UE; provide the encoded video within the ROI (110; 150) for rendering and display at the local UE (148; 204); and receive a session description protocol, SDP, offer message from the remote UE (128; 202) that includes an attribute of a=rtcp-fb that is associated with a parameter 3gpp-roi-zoom, thereby indicating that the remote UE (128; 202) supports ROI-based video capturing, ROI-based video encoding and ROI-based video transmissions, wherein the remote UE is configured to process RTCP feedback messages received from the local UE in order to obtain ROI information; or send an SDP answer message that includes an attribute of a=rtcp-fb that is associated with a parameter 3gpp-roi-zoom, thereby indicating that the local UE supports ROI signalling via RTCP feedback messages, ROI-based video decoding and ROI-based video reception, wherein the local UE (148; 204) is configured to generate the RTCP feedback messages and send the RTCP feedback messages to the remote UE in order to deliver ROI information. define a region of interest, ROI (110;150); communicate the ROI (110; 150) to the remote UE (128; 202) via a real-time transport control protocol, RTCP, feedback message, wherein the RTCP feedback message instructs the remote UE to capture video within the ROI and encode the video within the ROI; receive the encoded video within the ROI (110; 150), from the remote UE (128; 202), the encoded video including regions within the ROI and excluding regions outside the ROI; receive actual transmitted ROI corresponding to the encoded video from the remote UE (128; 202) via a real-time transport protocol, RTP, header extension, wherein the RTP header extension is included in RTP packets that contain the encoded video, wherein the RTP header extension includes a position and a size that define the actual transmitted ROI, wherein the position comprises two position values within the field of view at the remote UE, wherein the size comprises two size values indicative of a size of the ROI within the field of view at the remote UE; provide the encoded video within the ROI (110; 150) for rendering and display at the local UE (148; 204); and receive a session description protocol, SDP, offer message from the remote UE (128; 202) that includes an attribute of a=rtcp-fb that is associated with a parameter 3gpp-roi-zoom, thereby indicating that the remote UE (128; 202) supports ROI-based video capturing, ROI-based video encoding and ROI-based video transmissions, wherein the remote UE is configured to process RTCP feedback messages received from the local UE in order to obtain ROI information; or send an SDP answer message that includes an attribute of a=rtcp-fb that is associated with a parameter 3gpp-roi-zoom, thereby indicating that the local UE supports ROI signalling via RTCP feedback messages, ROI-based video decoding and ROI-based video reception, wherein the local UE (148; 204) is configured to generate the RTCP feedback messages and send the RTCP feedback messages to the remote UE in order to deliver ROI information.