# Multiple camera support

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Users can use both the front and back cameras of their iOS mobile devices simultaneously using the methods provided by the Video SDK. Multiple cameras can also be used while screen sharing. Fore more information, see [ZoomVideoSDKVideoHelper Class Reference](https://marketplacefront.zoom.us/sdk/custom/ios/interface_zoom_video_s_d_k_video_helper.html).

## Support multiple cameras

Check if the user's device has multiple cameras and that other users in the session can see multiple video streams.

    ```swift
    if let videoHelper = ZoomVideoSDK.shareInstance()?.getVideoHelper(), videoHelper.isMultiStreamSupported() {

    }
    ```



    ```objectivec
    BOOL isMultiStreamSupported = [[[ZoomVideoSDK shareInstance] getVideoHelper] isMultiStreamSupported];
    if (isMultiStreamSupported) {

    }
    ```

Get the device's available camera list and important information about each camera, including the

-   `deviceId`
-   `deviceName`
-   `isSelectDevice`
-   `isSelectedAsMultiCamera`
-   `isRunningAsMultiCamera`

```swift
if let cameraList = videoHelper.getCameraDeviceList() {
    for camera in cameraList {
        // Each device contains deviceId, deviceName, isSelectDevice, isSelectedAsMultiCamera, isRunningAsMultiCamera and more.
    }
}
```

```objectivec
NSArray *cameraList = [[[ZoomVideoSDK shareInstance] getVideoHelper] getCameraDeviceList];
for (ZoomVideoSDKCameraDevice *device in cameraList) {
    // Each device contains deviceId, deviceName, isSelectDevice, isSelectedAsMultiCamera, isRunningAsMultiCamera and more.
}
```

With the available camera list, the user can then use the `deviceId` to choose which camera they want to enable, disable, unmute (turn on), or mute (turn off). These methods will trigger the `onMultiCameraStreamStatusChanged` callbacks with different parameters under the [ZoomVideoSDKDelegate](https://marketplacefront.zoom.us/sdk/custom/ios/protocol_zoom_video_s_d_k_delegate-p.html).

```swift
// To enable/disable multi video stream for a camera given its deviceID
let enableBOOLResult = videoHelper.enableMultiStreamVideo("cameraDeviceID", customDeviceName: nil)
let disableBOOLResult = videoHelper.disableMultiStreamVideo("cameraDeviceID")

// Enable/Disable will trigger the 2 onMultiCameraStreamStatusChanged callback under ZoomVideoSDKDelegate
func onMultiCameraStreamStatusChanged(_ status: ZoomVideoSDKMultiCameraStreamStatus, parentUser user: ZoomVideoSDKUser?, videoPipe: ZoomVideoSDKRawDataPipe?) {
    // Getting ZoomVideoSDKRawDataPipe
}

func onMultiCameraStreamStatusChanged(_ status: ZoomVideoSDKMultiCameraStreamStatus, parentUser user: ZoomVideoSDKUser?, videoCanvas: ZoomVideoSDKVideoCanvas?) {
    // Getting ZoomVideoSDKVideoCanvas
}

// To mute (turn off) / unmute (turn on) the multi video stream given its deviceID
let muteBOOLResult = videoHelper.muteMultiStreamVideo("cameraDeviceID")
let unmuteBOOLResult = videoHelper.unmuteMultiStreamVideo("cameraDeviceID")
```

```objectivec
// To enable/disable multi video stream for a camera given its deviceID
BOOL enableBOOLResult = [[[ZoomVideoSDK shareInstance] getVideoHelper] enableMultiStreamVideo:@"deviceID" customDeviceName:nil];
BOOL disableBOOLResult = [[[ZoomVideoSDK shareInstance] getVideoHelper] disableMultiStreamVideo:@"deviceID"];

// Enable/Disable will trigger the 2 onMultiCameraStreamStatusChanged callback under ZoomVideoSDKDelegate
- (void)onMultiCameraStreamStatusChanged:(ZoomVideoSDKMultiCameraStreamStatus)status parentUser:(ZoomVideoSDKUser *)user videoPipe:(ZoomVideoSDKRawDataPipe *)videoPipe
{
   // Getting ZoomVideoSDKRawDataPipe
}

- (void)onMultiCameraStreamStatusChanged:(ZoomVideoSDKMultiCameraStreamStatus)status parentUser:(ZoomVideoSDKUser *)user videoCanvas:(ZoomVideoSDKVideoCanvas *)videoCanvas
{
   // Getting ZoomVideoSDKVideoCanvas
}

// To mute (turn off) / unmute (turn on) the multi video stream given its deviceID
BOOL muteBOOLResult = [[[ZoomVideoSDK shareInstance] getVideoHelper] muteMultiStreamVideo:@"deviceID"];
BOOL unmuteBOOLResult = [[[ZoomVideoSDK shareInstance] getVideoHelper] unmuteMultiStreamVideo:@"deviceID"];
```

To find the `deviceId` in the raw data of the multi camera pipe or canvas, use the `getDeviceIDByMyPipe` or `getDeviceIDByMyCanvas` methods. For more information about handling raw data, see [Raw data](/docs/video-sdk/ios/raw-data/).

```swift
if let localUser = ZoomVideoSDK.shareInstance()?.getSession()?.getMySelf() {
  // Get the user's multi camera stream - ZoomVideoSDKRawDataPipe
  if let pipeList = localUser.getMultiCameraStreamList() {
      for pipe in pipeList {
          let deviceID = videoHelper.getDeviceID(byMyPipe: pipe)
      }
  }

  // Get the user's multi camera canvas - ZoomVideoSDKVideoCanvas
  if let canvasList = localUser.getMultiCameraCanvasList() {
      for canvas in canvasList {
          let deviceID = videoHelper.getDeviceID(byMyCanvas: canvas)
      }
  }
}
```

```objectivec
ZoomVideoSDKUser *localUser = [[[ZoomVideoSDK shareInstance] getSession] getMySelf];

// Get the user's multi camera stream - ZoomVideoSDKRawDataPipe
NSArray <ZoomVideoSDKRawDataPipe *> *pipeList = localUser.getMultiCameraStreamList;
for (ZoomVideoSDKRawDataPipe *pipe in pipeList) {
   NSString *deviceID = [[[ZoomVideoSDK shareInstance] getVideoHelper] getDeviceIDByMyPipe:pipe];
}

// Get the user's multi camera canvas - ZoomVideoSDKVideoCanvas
NSArray <ZoomVideoSDKVideoCanvas *> *canvasList = localUser.getMultiCameraCanvasList;
for (ZoomVideoSDKVideoCanvas *canvas in canvasList) {
   NSString *deviceId = [[[ZoomVideoSDK shareInstance] getVideoHelper] getDeviceIDByMyCanvas:canvas];
}
```