# RPC protocol MixedReality WebRTC **URL:** \ **Category:** Issues with deployment\ **Tags:** v2\ **Created:** [January 7, 2022, 2:51pm UTC](https://openvidu.discourse.group/t/rpc-protocol-mixedreality-webrtc/3691 "2022-01-07T14:51:26Z")\ **Posts on this page:** 2\ **Page:** 1
**Author:** ![Striiki](https://avatars.discourse-cdn.com/v4/letter/s/ecccb3/32.png) [@Striiki](https://openvidu.discourse.group/u/Striiki)\ **Post date:** [January 7, 2022, 2:51pm UTC](https://openvidu.discourse.group/t/rpc-protocol-mixedreality-webrtc/3691/1 "2022-01-07T14:51:26Z")
Hello guys i’m having an issue making things work with OpenVidu RPC and MixedReality- WebRTC. The final problem is: If i publish my video i’m unable to receive video, and if i receive i’m unable to publish. When i try to handle both the same way i get the “Cannot apply remote description: Object not initialized.” What i’m doing 1 - I join a room with my session token 2 - I publish video with the created SDP Offer (with mixed reality WebRTC) The problem???: When i want to receive the video (again, using the RPC protocol), if i call “receiveVideoFrom” which sdp offer do i fill in the request? The same that i use to publish the video? The one i receive in the answer of publish video? I need to get it somewhere else? Thank you in advance ---
**Author:** ![micael.gallego](https://yyz2.discourse-cdn.com/free1/user_avatar/openvidu.discourse.group/micael.gallego/32/2_2.png) [@micael.gallego](https://openvidu.discourse.group/u/micael.gallego)\ **Post date:** [January 7, 2022, 3:24pm UTC](https://openvidu.discourse.group/t/rpc-protocol-mixedreality-webrtc/3691/2 "2022-01-07T15:24:38Z")
Hello @Striiki, You have to create a brand new SDP offer to receive video from other participant. Currently in OpenVidu every audio+video stream in a session has its own SDP negotiation (completely independent from others). In the future we can maybe reuse the same transport for several streams. Best regards