1. The universal transcoding MCU is used - the protocol, format and bandwidth used by the participants must be consistent.
The traditional non-universal transcoding MCU forwards video. Generally, the video protocol, rate and format of participants in the same conference must be consistent. A video conference can be held only with the lowest capability of the participants' terminals. If a terminal's capability is too low, the conference effect is greatly affected.
Alternatively, the non-universal transcoding MCU has only a small quantity of transcoding resources. In a conference, different levels of video capabilities are specified for transcoding. Participants at the same video capability level share transcoding resources. Participants cannot connect to the conference with any protocols, formats and bandwidths.
2. A non-universal transcoding MCU cannot be used to view different continuous presence.
The participants in a conference held by the non-universal transcoding MCU can only view the same CP view. The requirements for participants to view their own CP view cannot be met and the conference experience is poor.
3. The non-universal transcoding MCU cannot efficiently isolate the participant who has lost packets.
In a conference, when packets are lost on the network of a participant, the participant frequently applies for I frames and the video of other participants with the same video source freezes, affecting the conference effect.
