Matrice 3TD 无人机飞行直播，用websocket推送的数据中，没有fov的数据吗？

你好，我接入了无人机的直播视频，然后用 websocket 获取了实时数据，如下：

{

"attitude_head": -79.2,

"attitude_pitch": 0.9,

"attitude_roll": 2.5,

"elevation": 157.9,

"battery": {

"batteries": [

{

"firmware_version": "26.03.00.44",

"index": 0,

"loop_times": 36,

"capacity_percent": 39,

"sn": "6Q7PLAUDA0005L",

"sub_type": 0,

"temperature": 38.7,

"type": 0,

"voltage": 14305,

"high_voltage_storage_days": 4

}

"capacity_percent": 39,

"landing_power": 8,

"remain_flight_time": 617,

"return_home_power": 26

"gear": 1,

"height": 1334.9657,

"home_distance": 52.471848,

"horizontal_speed": 0,

"latitude": 26.929647,

"longitude": 106.47189,

"mode_code": 3,

"total_flight_distance": 262846.71500977525,

"total_flight_time": 52862.797,

"vertical_speed": 0,

"wind_direction": 2,

"wind_speed": 51,

"position_state": {

"gps_number": 32,

"is_fixed": 2,

"quality": 5,

"rtk_number": 53

"storage": {

"total": 60368000,

"used": 11000

"night_lights_state": 0,

"height_limit": 350,

"distance_limit_status": {

"state": 0,

"distance_limit": 5000,

"is_near_distance_limit": false

"obstacle_avoidance": {

"horizon": 1,

"upside": 1,

"downside": 1

"activation_time": 1711413052,

"cameras": [

{

"camera_mode": 0,

"liveview_world_region": {

"bottom": 0.98198986,

"left": 0.0013554589,

"right": 0.98475224,

"top": 0.023952827

"payload_index": "81-0-0",

"photo_state": 0,

"record_time": 0,

"recording_state": 0,

"remain_photo_num": 11086,

"remain_record_duration": 0,

"zoom_factor": 1,

"ir_zoom_factor": 2,

"screen_split_enable": false,

"photo_storage_settings": ["vision"],

"wide_exposure_mode": 1,

"wide_iso": 3,

"wide_shutter_speed": 5,

"wide_exposure_value": 16,

"zoom_exposure_mode": 1,

"zoom_iso": 3,

"zoom_shutter_speed": 5,

"zoom_exposure_value": 16,

"zoom_focus_mode": 0,

"zoom_focus_value": 36,

"zoom_max_focus_value": 66,

"zoom_min_focus_value": 34,

"ir_metering_mode": 0,

"ir_metering_point": {

"x": 0.5,

"y": 0.5,

"temperature": 0

"zoom_calibrate_farthest_focus_value": 36,

"zoom_calibrate_nearest_focus_value": 66,

"zoom_focus_state": 0

}

"rc_lost_action": 2,

"rth_altitude": 100,

"total_flight_sorties": 103,

"country": "CN",

"rid_state": true,

"maintain_status": {

"maintain_status_array": [

{

"last_maintain_flight_sorties": 0,

"last_maintain_flight_time": 0,

"last_maintain_time": 0,

"last_maintain_type": 1,

"state": false

{

"last_maintain_flight_sorties": 0,

"last_maintain_flight_time": 0,

"last_maintain_time": 0,

"last_maintain_type": 2,

"state": false

{

"last_maintain_flight_sorties": 0,

"last_maintain_flight_time": 0,

"last_maintain_time": 0,

"last_maintain_type": 3,

"state": false

}

]

"track_id": "9772a1a5-8de2-45a0-a96d-ec675eec82e2",

"payload": [

{

"payload_index": "81-0-0",

"gimbal_pitch": -45,

"gimbal_roll": 0,

"gimbal_yaw": -79.247375,

"thermal_current_palette_style": 3,

"thermal_gain_mode": 2,

"thermal_global_temperature_max": 68.38943,

"thermal_global_temperature_min": 24.3948,

"thermal_isotherm_lower_limit": -20,

"thermal_isotherm_state": 0,

"thermal_isotherm_upper_limit": 150,

"zoom_factor": 0.56782335

}

"is_near_area_limit": false,

"is_near_height_limit": false

}

我现在需要在三维场景下构建相机，问题如下：

构建三维相机的 fov 参数，我没找到，请问在哪里？有默认的 fov 参数吗？
cameras[0].liveview_world_region 是做什么的？
cameras[0].zoom_factor 和 payload.zoom_factor 哪个有效？或者说是代表不同的缩放？

我用的参数文档：https://developer.dji.com/doc/cloud-api-tutorial/cn/api-reference/dock-to-cloud/mqtt/aircraft/m3d-properties.html

谢谢！

Matrice 3TD 无人机飞行直播，用websocket推送的数据中，没有fov的数据吗？

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