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1{
2  "offer": {
3    "castMode": "mirroring",
4    "supportedStreams": [
5      {
6        "aesIvMask": "64A6AAC2821880145271BB15B0188821",
7        "aesKey": "65386FD9BCC30BC7FB6A4DD1D3B0FA5E",
8        "bitRate": 102000,
9        "channels": 2,
10        "codecName": "opus",
11        "index": 0,
12        "receiverRtcpEventLog": true,
13        "rtpExtensions": ["adaptive_playout_delay"],
14        "rtpPayloadType": 127,
15        "rtpProfile": "cast",
16        "sampleRate": 48000,
17        "ssrc": 264890,
18        "targetDelay": 400,
19        "timeBase": "1/48000",
20        "type": "audio_source"
21      },
22      {
23        "aesIvMask": "64A6AAC2821880145271BB15B0188821",
24        "aesKey": "65386FD9BCC30BC7FB6A4DD1D3B0FA5E",
25        "codecName": "vp8",
26        "index": 1,
27        "maxBitRate": 5000000,
28        "maxFrameRate": "30000/1000",
29        "receiverRtcpEventLog": true,
30        "renderMode": "video",
31        "resolutions": [{"height": 1080, "width": 1920}],
32        "rtpExtensions": ["adaptive_playout_delay"],
33        "rtpPayloadType": 96,
34        "rtpProfile": "cast",
35        "ssrc": 748229,
36        "targetDelay": 400,
37        "timeBase": "1/90000",
38        "type": "video_source"
39      },
40      {
41        "aesIvMask": "64A6AAC2821880145271BB15B0188821",
42        "aesKey": "65386FD9BCC30BC7FB6A4DD1D3B0FA5E",
43        "codecName": "h264",
44        "codecParameter": "avc1.4D4028",
45        "index": 2,
46        "maxBitRate": 4000000,
47        "maxFrameRate": "25",
48        "receiverRtcpEventLog": false,
49        "renderMode": "video",
50        "resolutions": [{"height": 720, "width": 1280}],
51        "rtpExtensions": ["adaptive_playout_delay"],
52        "rtpPayloadType": 97,
53        "rtpProfile": "cast",
54        "ssrc": 748229,
55        "targetDelay": 400,
56        "timeBase": "1/90000",
57        "type": "video_source"
58      },
59      {
60        "aesIvMask": "64A6AAC2821880145271BB15B0188821",
61        "aesKey": "65386FD9BCC30BC7FB6A4DD1D3B0FA5E",
62        "codecName": "vp9",
63        "index": 2,
64        "maxBitRate": 5000000,
65        "maxFrameRate": "30000/1000",
66        "receiverRtcpEventLog": true,
67        "renderMode": "video",
68        "resolutions": [{"height": 1080, "width": 1920}],
69        "rtpExtensions": ["adaptive_playout_delay"],
70        "rtpPayloadType": 96,
71        "rtpProfile": "cast",
72        "ssrc": 748230,
73        "targetDelay": 400,
74        "timeBase": "1/90000",
75        "type": "video_source"
76      },
77      {
78        "aesIvMask": "64A6AAC2821880145271BB15B0188821",
79        "aesKey": "65386FD9BCC30BC7FB6A4DD1D3B0FA5E",
80        "codecName": "av1",
81        "index": 3,
82        "maxBitRate": 5000000,
83        "maxFrameRate": "30000/1000",
84        "receiverRtcpEventLog": true,
85        "renderMode": "video",
86        "resolutions": [{"height": 1080, "width": 1920}],
87        "rtpExtensions": ["adaptive_playout_delay"],
88        "rtpPayloadType": 96,
89        "rtpProfile": "cast",
90        "ssrc": 748231,
91        "targetDelay": 400,
92        "timeBase": "1/90000",
93        "type": "video_source"
94      }
95    ]
96  },
97  "seqNum": 123,
98  "type": "OFFER"
99}
100