- \n
- NSCameraUsageDescription (Privacy – Camera Usage Description)<\/li>\n<\/ul>\n
Capturing Video with AVFoundation<\/h3>\n
Basic Camera Setup<\/h4>\n
To capture video, you need to set up a few core components:<\/p>\n
- \n
- AVCaptureSession:<\/strong> Manages the flow of data from the input devices to the output.<\/li>\n<\/ul>\n
![\".\"](\"https:\/\/www.tothenew.com\/blog\/wp-ttn-blog\/uploads\/2024\/10\/AVCaptureSession-1024x101.png\")
To initialize the session<\/p><\/div>\n
- \n
- AVCaptureDevice:<\/strong> Represents the physical camera on the device.<\/li>\n<\/ul>\n
![\".\"](\"https:\/\/www.tothenew.com\/blog\/wp-ttn-blog\/uploads\/2024\/10\/AVCaptureDevice-1024x461.png\")
To get the camera from lenses<\/p><\/div>\n
- \n
- AVCaptureDeviceInput:<\/strong> Connects the AVCaptureDevice to the session.<\/li>\n<\/ul>\n
![\".\"](\"https:\/\/www.tothenew.com\/blog\/wp-ttn-blog\/uploads\/2024\/10\/AVCaptureDeviceInput-1024x520.png\")
To set the inputs for the camera<\/p><\/div>\n
- \n
- AVCaptureVideoDataOutput:<\/strong> Handles the video data output.<\/li>\n<\/ul>\n
![\".\"](\"https:\/\/www.tothenew.com\/blog\/wp-ttn-blog\/uploads\/2024\/10\/AVCaptureVideoDataOutput-1024x383.png\")
To get video output from camera<\/p><\/div>\n
- \n
- AVCapturePhotoOutput:<\/strong> Handles the photo data output.<\/li>\n<\/ul>\n
To get video output from the camera<\/p><\/div>\n
- \n
- Preview Layer:<\/strong> To display the camera feed on the screen.\n
![\".\"](\"https:\/\/www.tothenew.com\/blog\/wp-ttn-blog\/uploads\/2024\/10\/Preview-Layer-1024x79.png\")
To set the camera layer<\/p><\/div><\/li>\n<\/ul>\n
<\/h2>\n
Starting and Stopping the Session<\/h3>\n
- \n
- Start the session when you\u2019re ready to begin capturing:<\/li>\n<\/ul>\n
![\".\"](\"https:\/\/www.tothenew.com\/blog\/wp-ttn-blog\/uploads\/2024\/10\/Starting-1024x189.png\")
To start the camera session<\/p><\/div>\n
- \n
- And stop it when you need to:<\/li>\n<\/ul>\n
![\".\"](\"https:\/\/www.tothenew.com\/blog\/wp-ttn-blog\/uploads\/2024\/10\/Stopping-1024x247.png\")
To stop the camera session<\/p><\/div>\n
Advanced Camera Features<\/h2>\n
- \n
- Focus\n
- \n
- Constants indicate the mode of the focus on the receiver’s device. To set the focus of the camera you can use the device focusMode<\/span> property.<\/li>\n
- There are three types of focus mode.\n
- \n
- locked<\/strong>: Indicates that the focus should be locked at the lens’ current position.<\/li>\n
- autoFocus<\/strong>: Indicates that the device should autofocus once and then change the focus mode to AVCaptureFocusModeLocked.<\/li>\n
- continuousAutoFocus<\/strong>: Indicates that the device should automatically focus when needed.<\/li>\n<\/ol>\n<\/li>\n
- To set the focus mode you first need to check whether the mode is supported or not on that device by using<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n
![\".\"](\"https:\/\/www.tothenew.com\/blog\/wp-ttn-blog\/uploads\/2024\/10\/Focus-1024x168.png\")
To set the focus of the camera<\/p><\/div>\n
- \n
- \n
- \n
- To set device configuration you should be in device configuration mode enabled to change the device camera setting. This can be achieved by using<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n
![\".\"](\"https:\/\/www.tothenew.com\/blog\/wp-ttn-blog\/uploads\/2024\/10\/Focus-2-1-1024x357.png\")
Error handling while setting the focus of the camera<\/p><\/div>\n
- \n
- Exposure\n
- \n
- Constants indicate the mode of the exposure on the receiver’s device if it has adjustable exposure. To set the focus of the camera you can use the device exposureMode<\/span> property.<\/li>\n
- In simple words, exposure means the amount of light that reaches a camera’s sensor or film when a picture is taken.<\/li>\n
- It helps to capture slow-movement and fast-movement objects.<\/li>\n
- To control exposure you can set the exposureMode property\n
- \n
- locked<\/strong>: Indicates that the exposure should be locked at its current value.<\/li>\n
- autoExpose<\/strong>: Indicates that the device should automatically adjust exposure once and then change the exposure mode to AVCaptureExposureModeLocked.<\/li>\n
- continuousAutoExposure<\/strong>: Indicates that the device should automatically adjust exposure when needed.<\/li>\n
- custom<\/strong>: Indicates that the device should only adjust exposure according to user-provided ISO and exposure Duration values.\n
- \n
- When you set exposure mode custom you should call the function setExposureModeCustom.<\/strong><\/li>\n<\/ul>\n<\/li>\n<\/ol>\n<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n
- autoExpose<\/strong>: Indicates that the device should automatically adjust exposure once and then change the exposure mode to AVCaptureExposureModeLocked.<\/li>\n
- Constants indicate the mode of the exposure on the receiver’s device if it has adjustable exposure. To set the focus of the camera you can use the device exposureMode<\/span> property.<\/li>\n
- Exposure\n
- To set device configuration you should be in device configuration mode enabled to change the device camera setting. This can be achieved by using<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n
- autoFocus<\/strong>: Indicates that the device should autofocus once and then change the focus mode to AVCaptureFocusModeLocked.<\/li>\n
- There are three types of focus mode.\n
- Constants indicate the mode of the focus on the receiver’s device. To set the focus of the camera you can use the device focusMode<\/span> property.<\/li>\n
- Focus\n
- And stop it when you need to:<\/li>\n<\/ul>\n
- Start the session when you\u2019re ready to begin capturing:<\/li>\n<\/ul>\n
- Preview Layer:<\/strong> To display the camera feed on the screen.\n
- AVCapturePhotoOutput:<\/strong> Handles the photo data output.<\/li>\n<\/ul>\n
- AVCaptureVideoDataOutput:<\/strong> Handles the video data output.<\/li>\n<\/ul>\n
- AVCaptureDeviceInput:<\/strong> Connects the AVCaptureDevice to the session.<\/li>\n<\/ul>\n
- AVCaptureDevice:<\/strong> Represents the physical camera on the device.<\/li>\n<\/ul>\n
- AVCaptureSession:<\/strong> Manages the flow of data from the input devices to the output.<\/li>\n<\/ul>\n
![\".\"](\"https:\/\/www.tothenew.com\/blog\/wp-ttn-blog\/uploads\/2024\/10\/Exposure-1024x298.png\")
![\".\"](\"https:\/\/www.tothenew.com\/blog\/wp-ttn-blog\/uploads\/2024\/10\/Custom-Exposure-1024x346.png\")