1{ 2 "video_streams": [ 3 { 4 "duration_ms": 10000, 5 "video_width": 640, 6 "video_height": 480, 7 "video_fps": 24, 8 "rtp" : { 9 "payload_name" : "VP9" 10 } 11 } 12 ] 13} 14