question

Use Alexa to RealTime Communication with the camera through webrtc. the video frame is sent to Alexa, and the feedback of PLI is received. Try to send the key frame to Alexa, but the PLI is still received. At the same time, no NACK request is received. The sound is a normal two-way call, but the video of Alexa cannot be displayed, Can there be a more accurate error code on the Alexa side to help me locate this problem? Thank you!