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# 输入切换操作 – 有效载荷
<a name="cli-schedule-fields-for-input-switch"></a>

以下各节显示输入切换操作的有效载荷。

在此有效载荷中，`ScheduleActionStartSettings` 仅包含 `FixedModeScheduleActionStartSettings`、`ImmediateModeScheduleActionStartSettings` 或 `FollowModeScheduleActionStartSettings` 中的一个。

有关每个标签的示例，请参阅以下示例。

有关以下 JSON 中字段和值的含义的信息，请参阅 [输入切换的字段](schedule-fields-for-ips.md)。

```
{
"ChannelId": "string",
"Creates": {
 "ScheduleActions": [
  {
   "ScheduleActionStartSettings": {
    "FixedModeScheduleActionStartSettings": {
     "Time": "string"
    },
    "FollowModeScheduleActionStartSettings": {
     "FollowPoint": "enum",
     "ReferenceActionName": "string"
    },
    "ImmediateModeScheduleActionStartSettings": {
    }
   },
   "ActionName": "string",
   "ScheduleActionSettings": {
    "InputSwitchSettings": {
     "InputAttachmentNameReference": "string",
     "InputClippingSettings": {
      "InputTimecodeSource": "enum",
      "StartTimecode": {
       "Timecode": "string"
      },
      "StopTimecode": {
       "LastFrameClippingBehavior": "enum",
       "Timecode": "string"
      }
     },
     "UrlPath": ["string", ...]
    }
   }
  ]
 }
}
```

## 切换到固定启动时间的实时输入的示例
<a name="json-switch-example-1"></a>

此请求示例将在固定启动时间切换到实时输入。切换操作称为 `studio-feed`，它会切换到连接到名为 `live-studio-feed` 的输入附件的输入。它会在指定的 UTC 时间切换到此输入。

```
{
  "ChannelId": "999999",
  "Creates": {
    "ScheduleActions": [
      {
       "ScheduleActionStartSettings": {
          "FixedModeScheduleActionStartSettings": {
            "Time": "2018-05-21T20:42:19.000Z"
           }
          },
      "ActionName": "studio-feed",
      "ScheduleActionSettings": {
        "InputSwitchSettings": {
          "InputAttachmentNameReference": "live-studio-feed" 
     }
    }
   }
  ]
 }
}
```

## 静态文件切换为跟随的示例
<a name="json-switch-example"></a>

此请求示例是切换到静态文件输入以跟随前一个输入的结束。切换操作称为 `action-ad-003`，它会切换到连接到名为 `zel-cafe` 的输入附件的输入。当名为 `action-ad-002` 的操作结束时，它会切换到此输入。此操作的文件会被剪辑，使其在 30 秒零 11 帧后结束：

```
{
  "ChannelId": "999999",
  "Creates": {
      "ScheduleActions": [
          {
            "ScheduleActionStartSettings": {
              "FollowModeScheduleActionStartSettings": {
                "FollowPoint": "END",
                "ReferenceActionName": "action-ad-002"
              }
            },
            "ActionName": "action-ad-003",
              "ScheduleActionSettings": {
                 "InputSwitchSettings": {
                    "InputAttachmentNameReference": "zel-cafe",
                      "InputClippingSettings": {
                          "InputTimecodeSource": "ZEROBASED",
               "StopTimecode":{
                 "Timecode": "00:00:30:11",
                 "LastFrameClippingBehavior": "INCLUDE_LAST_FRAME"
       }
      }
     }
    }
   }
  ]
 }
}
```

## 切换到具有即时启动时间的动态输入的示例
<a name="json-switch-example2"></a>

此请求示例是立即切换到动态文件输入。切换操作称为 `action-unscheduled-standby`，它会切换到连接到名为 `dynamic-unscheduled-standby` 的输入附件的输入。对于这种用于动态输入的用法，要使用的文件是 `oceanwaves.mp4`。

```
{
  "ChannelId": "999999",
  "Creates": {
    "ScheduleActions": [
      {
        "ScheduleActionStartSettings": 
          {
          "ImmediateModeScheduleActionStartSettings": {
          }
         },
       "ActionName": "action-unscheduled-slate",
        "ScheduleActionSettings": {
          "InputSwitchSettings": {
            "InputAttachmentNameReference": "slate",
            "UrlPath":[
              "main/oceanwaves.mp4",
              "redundant/oceanwaves.mp4"]
     }
    }
   }
  ]
 }
}
```