# Multiple camera support

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Users can run more than one camera at the same time using the methods provided by the Video SDK for macOS. Multiple cameras can also be used while screen sharing.

To enumerate the available cameras and read each camera's `deviceID`, see [Get the camera list](/docs/video-sdk/macos/video/camera-controls/#get-the-camera-list).

## Enable or disable a multi-camera stream

Pass a `deviceID` from the camera list to enable or disable that camera as an additional stream. You can supply a custom display name when enabling. Both calls fire `onMultiCameraStreamStatusChanged`. For more information, see [Multi-camera stream status](/docs/video-sdk/macos/video/video-events/#multi-camera-stream-status).

```swift
let videoHelper = ZMVideoSDK.shared()?.getVideoHelper()
let enableResult = videoHelper?.enableMultiStreamVideo("cameraDeviceID", customDeviceName: nil)
let disableResult = videoHelper?.disableMultiStreamVideo("cameraDeviceID")
```

```objectivec
ZMVideoSDKVideoHelper *videoHelper = [[ZMVideoSDK sharedVideoSDK] getVideoHelper];
BOOL enableResult = [videoHelper enableMultiStreamVideo:@"cameraDeviceID" customDeviceName:nil];
BOOL disableResult = [videoHelper disableMultiStreamVideo:@"cameraDeviceID"];
```

## Mute or unmute a multi-camera stream

Mute or unmute an active multi-camera stream by its `deviceID`.

```swift
let videoHelper = ZMVideoSDK.shared()?.getVideoHelper()
let muteResult = videoHelper?.muteMultiStreamVideo("cameraDeviceID")
let unmuteResult = videoHelper?.unmuteMultiStreamVideo("cameraDeviceID")
```

```objectivec
ZMVideoSDKVideoHelper *videoHelper = [[ZMVideoSDK sharedVideoSDK] getVideoHelper];
BOOL muteResult = [videoHelper muteMultiStreamVideo:@"cameraDeviceID"];
BOOL unmuteResult = [videoHelper unmuteMultiStreamVideo:@"cameraDeviceID"];
```

## Map a pipe back to a device ID

The local user's multi-camera streams are exposed as `ZMVideoSDKRawDataPipe` objects through `getMultiCameraStreamList`. To find the `deviceID` for a given pipe, use `getDeviceIDByMyPipe`. For more on handling raw data, see [Raw data](/docs/video-sdk/macos/raw-data/).

```swift
if let localUser = ZMVideoSDK.shared()?.getSession()?.getMySelf(),
   let pipeList = localUser.getMultiCameraStreamList() {
    let videoHelper = ZMVideoSDK.shared()?.getVideoHelper()
    for pipe in pipeList {
        let deviceID = videoHelper?.getDeviceIDByMyPipe(pipe)
    }
}
```

```objectivec
ZMVideoSDKUser *localUser = [[[ZMVideoSDK sharedVideoSDK] getSession] getMySelf];
NSArray<ZMVideoSDKRawDataPipe *> *pipeList = [localUser getMultiCameraStreamList];
ZMVideoSDKVideoHelper *videoHelper = [[ZMVideoSDK sharedVideoSDK] getVideoHelper];
for (ZMVideoSDKRawDataPipe *pipe in pipeList) {
    NSString *deviceID = [videoHelper getDeviceIDByMyPipe:pipe];
}
```