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Interface: CameraProps

Extends​

  • ViewProps

Properties​

androidPreviewViewType?​

optional androidPreviewViewType: "surface-view" | "texture-view"

Specifies the implementation mode for the Preview View on Android.

  • "surface-view": Uses a SurfaceView for rendering. This is more efficient and supports HDR rendering, but doesn't support masks, transparency, rotations or clipping.
  • "texture-view": Uses a TextureView for rendering. This is less efficient and doesn't support HDR rendering, but supports masks, transparency, rotations and clipping.

Default​

'surface-view'

Defined in​

types/CameraProps.ts:185

audio?​

optional audio: boolean

Enables audio capture for video recordings (see "Recording Videos")

Note: Requires audio permission.

Defined in​

types/CameraProps.ts:85

codeScanner?​

optional codeScanner: CodeScanner

A CodeScanner that can detect QR-Codes or Barcodes using platform-native APIs.

See​

See the Code Scanner documentation for more information

Example​

const codeScanner = useCodeScanner({
  codeTypes: ['qr', 'ean-13'],
  onCodeScanned: (codes) => {
    console.log(`Scanned ${codes.length} codes!`)
  }
})

return <Camera {...props} codeScanner={codeScanner} />

Defined in​

types/CameraProps.ts:418

device​

device: CameraDevice

The Camera Device to use.

See the Camera Devices section in the documentation for more information about Camera Devices.

Example​

const device = useCameraDevice('back')

if (device == null) return <NoCameraErrorView />
return (
  <Camera
    device={device}
    isActive={true}
    style={StyleSheet.absoluteFill}
  />
)

Defined in​

types/CameraProps.ts:53

enableBufferCompression?​

optional enableBufferCompression: boolean

Enables or disables lossy buffer compression for the video stream. If you only use video or a frameProcessor, this can increase the efficiency and lower memory usage of the Camera.

If buffer compression is enabled, the video pipeline will try to use a lossy-compressed pixel format instead of the normal one.

If you use a frameProcessor, you might need to change how pixels are read inside your native frame processor function as this is different from the usual yuv or rgb layout.

If buffer compression is not available but this property is enabled, the normal pixel formats will be used and no error will be thrown.

Platform​

iOS

Default​

- true // if frameProcessor={undefined}
- false // otherwise

Defined in​

types/CameraProps.ts:258

enableDepthData?​

optional enableDepthData: boolean

Enables or disables depth data delivery for photo capture.

Make sure the given format supports depth data (see format.supportsDepthCapture).

Default​

false

Defined in​

types/CameraProps.ts:285

enableFpsGraph?​

optional enableFpsGraph: boolean

If true, show a debug view to display the FPS of the Video Pipeline (Frame Processor). This is useful for debugging your Frame Processor's speed.

Default​

false

Defined in​

types/CameraProps.ts:301

enableLocation?​

optional enableLocation: boolean

Enables location streaming to add GPS EXIF tags to captured photos and videos.

Note: Requires location permission.

Note: This property will throw a system/location-not-enabled error if the Location APIs are not enabled at build-time. See the "GPS Location Tags" documentation for more information.

Defined in​

types/CameraProps.ts:107

enablePortraitEffectsMatteDelivery?​

optional enablePortraitEffectsMatteDelivery: boolean

A boolean specifying whether the photo render pipeline is prepared for portrait effects matte delivery.

When enabling this, you must also set enableDepthData to true.

Platform​

iOS 12.0+

Default​

false

Defined in​

types/CameraProps.ts:294

enableZoomGesture?​

optional enableZoomGesture: boolean

Enables or disables the native pinch to zoom gesture.

If you want to implement a custom zoom gesture, see the Zooming with Reanimated documentation.

Default​

false

Defined in​

types/CameraProps.ts:138

exposure?​

optional exposure: number

Specifies the Exposure bias of the current camera. A lower value means darker images, a higher value means brighter images.

The Camera will still continue to auto-adjust exposure and focus, but will premultiply the exposure setting with the provided value here.

This values ranges from device.minExposure to device.maxExposure.

The value between min- and max supported exposure is considered the default, neutral value.

Defined in​

types/CameraProps.ts:151

format?​

optional format: CameraDeviceFormat

Selects a given format. By default, the best matching format is chosen. See CameraDeviceFormat

The format defines the possible values for properties like:

In other words; enableDepthData can only be set to true if format.supportsDepthCapture is true.

Defined in​

types/CameraProps.ts:167

fps?​

optional fps: number | [number, number]

Specify a the number of frames per second this camera should stream frames at.

  • If fps is a single number, the Camera will be streaming at a fixed FPS value.
  • If fps is a tuple/array, the Camera will be free to choose a FPS value between minFps and maxFps, depending on current lighting conditions. Allowing a lower minFps value can result in better photos and videos, as the Camera can take more time to properly receive light for frames.

Make sure the given format can stream at the target fps value (see format.minFps and format.maxFps).

Defined in​

types/CameraProps.ts:196

frameProcessor?​

optional frameProcessor: ReadonlyFrameProcessor | DrawableFrameProcessor

A worklet which will be called for every frame the Camera "sees".

See​

See the Frame Processors documentation for more information

Example​

const frameProcessor = useFrameProcessor((frame) => {
  'worklet'
  const faces = scanFaces(frame)
  console.log(`Faces: ${faces}`)
}, [])

return <Camera {...cameraProps} frameProcessor={frameProcessor} />

Defined in​

types/CameraProps.ts:401

isActive​

isActive: boolean

Whether the Camera should actively stream video frames, or not. See the documentation about the isActive prop for more information.

This can be compared to a Video component, where isActive specifies whether the video is paused or not.

Note​

If you fully unmount the <Camera> component instead of using isActive={false}, the Camera will take a bit longer to start again. In return, it will use less resources since the Camera will be completely destroyed when unmounted.

Defined in​

types/CameraProps.ts:61

isMirrored?​

optional isMirrored: boolean

Enables or disables mirroring of outputs alongside the vertical axis.

Mirroring only affects the photo-, video-, or snapshot-output, but not preview. The Preview is always mirrored for front cameras, and not mirrored for back cameras.

Default​

false (back camera), true (front camera)

Defined in​

types/CameraProps.ts:322

lowLightBoost?​

optional lowLightBoost: boolean

Enables or disables low-light boost on this camera device.

Enabling low light boost allows the FPS rate to be throttled to up to half of what it is set to to allow for more exposure in low light conditions.

On Android, lowLightBoost might even use a vendor-specific "night-mode" extension to allow for even more visibility in low-light conditions.

Make sure the given device supports low-light-boost (see device.supportsLowLightBoost).

Defined in​

types/CameraProps.ts:269

onBytesWrittenVideo()?​

optional onBytesWrittenVideo: (bytes) => void

Used to get the bytes written to the video file on real time while it is being recorded

Parameters​

• bytes: number

Returns​

void

Example​

const onBytesWrittenVideo = (bytes: number) => {
  console.log(`Bytes written: ${bytes}`)
}

return <Camera {...props} onBytesWrittenVideo={onBytesWrittenVideo} />

Defined in​

types/CameraProps.ts:430

onError()?​

optional onError: (error) => void

Called when any kind of runtime error occured.

Parameters​

• error: CameraRuntimeError

Returns​

void

Defined in​

types/CameraProps.ts:328

onInitialized()?​

optional onInitialized: () => void

Called when the camera session was successfully initialized and is ready for capture.

At this point, the Camera ref can be used and methods like takePhoto(..) can be called.

This is called everytime the device or one of the outputs changes.

Returns​

void

Defined in​

types/CameraProps.ts:336

onOutputOrientationChanged()?​

optional onOutputOrientationChanged: (outputOrientation) => void

Called whenever the output orientation changed. This might happen even if the screen/interface rotation is locked.

Parameters​

• outputOrientation: Orientation

Returns​

void

See​

See "Orientation"

Defined in​

types/CameraProps.ts:373

onPreviewOrientationChanged()?​

optional onPreviewOrientationChanged: (previewOrientation) => void

Called whenever the preview orientation changed. This will happen whenever the screen/interface rotates.

Parameters​

• previewOrientation: Orientation

Returns​

void

See​

See "Orientation"

Defined in​

types/CameraProps.ts:380

onPreviewStarted()?​

optional onPreviewStarted: () => void

Called when the Preview View has received it's first frame and is now started.

Returns​

void

Note​

This will only be called if preview is true, and no Skia Frame Processor is used

Defined in​

types/CameraProps.ts:354

onPreviewStopped()?​

optional onPreviewStopped: () => void

Called when the Preview View has stoppped streaming frames and is now stopped.

Returns​

void

Note​

This will only be called if preview is true, and no Skia Frame Processor is used

Defined in​

types/CameraProps.ts:360

onShutter()?​

optional onShutter: (event) => void

Called just before a photo or snapshot is captured.

Inside this callback you can play a custom shutter sound or show visual feedback to the user.

Parameters​

• event: OnShutterEvent

Returns​

void

Defined in​

types/CameraProps.ts:366

onStarted()?​

optional onStarted: () => void

Called when the camera started the session. (isActive={true})

At this point, outputs can start receiving frames from the Camera, but might not have received any yet.

Returns​

void

Defined in​

types/CameraProps.ts:342

onStopped()?​

optional onStopped: () => void

Called when the camera stopped the session. (isActive={false})

At this point, outputs will stop receiving frames from the Camera.

Returns​

void

Defined in​

types/CameraProps.ts:348

onUIRotationChanged()?​

optional onUIRotationChanged: (uiRotation) => void

Called whenever the target UI rotation/orientation changes.

Parameters​

• uiRotation: number

The degrees that UI elements need to be rotated by to appear up-right.

Returns​

void

Defined in​

types/CameraProps.ts:385

outputOrientation?​

optional outputOrientation: OutputOrientation

Sets the orientation of all Camera Outputs (Photo, Snapshot and Video).

  • 'preview': Use the same orientation as the preview view. If the device rotation is locked, the user cannot take photos or videos in different orientations.
  • 'device': Use whatever orientation the device is held in, even if the preview view is not rotated to that orientation. If the device rotation is locked, the user can still rotate his phone to take photos or videos in different orientations than the preview view.

Note​

Preview orientation will not be affected by this property, as it is always dependant on screen orientation

Note​

Frame Processors will not be affected by this property, as their buffer size (respective to Frame.orientation) is always the same

See​

See the Orientation documentation for more information

Default​

'device'

Defined in​

types/CameraProps.ts:313

photo?​

optional photo: boolean

Enables photo capture with the takePhoto function (see "Taking Photos")

Defined in​

types/CameraProps.ts:75

photoHdr?​

optional photoHdr: boolean

Enables or disables HDR Photo Capture via a double capture routine that combines low- and high exposure photos.

On Android, photoHdr uses a vendor-specific "HDR" extension which is not compatible with videoHdr, so only one of video- or photo-HDR can be enabled at a time.

Make sure the given format supports HDR (see format.supportsPhotoHdr).

Defined in​

types/CameraProps.ts:228

photoQualityBalance?​

optional photoQualityBalance: "speed" | "balanced" | "quality"

Configures the photo pipeline for a specific quality balance prioritization.

  • 'speed': Prioritizes fast capture speed over quality (faster edge-detection, distortion correction, AF/AE/AWB times, etc.)
  • 'balanced': A balanced set of prioritization configurations
  • 'quality': Prioritizes high quality capture over speed (higher accuracy edge-detection, distortion correction, AF/AE/AWB times, etc.)

Default​

'balanced'

Defined in​

types/CameraProps.ts:237

pixelFormat?​

optional pixelFormat: "yuv" | "rgb"

Specifies the pixel format of Frames streamed from a Frame Processor.

While 'yuv' is the most efficient format, some ML models (such as TensorFlow Face Detection Models) require input Frames to be in RGB colorspace, otherwise they just output nonsense.

The following values are supported:

  • yuv: The YUV (Y'CbCr 4:2:0 or NV21, 8-bit) format, either video- or full-range, depending on hardware capabilities. This is the most efficient format.
  • rgb: The RGB (RGBA or BGRA, 8-bit) format. This is less efficient format and sometimes requires explicit conversion.

Default​

'yuv'

Defined in​

types/CameraProps.ts:98

preview?​

optional preview: boolean

Enables preview streaming.

Preview is enabled by default, and disabled when using a Skia Frame Processor as Skia will use the video stream as it's preview.

Default​

true

Defined in​

types/CameraProps.ts:71

resizeMode?​

optional resizeMode: "cover" | "contain"

Specifies the Preview's resize mode.

  • "cover": Keep aspect ratio and fill entire parent view (centered).
  • "contain": Keep aspect ratio and make sure the entire content is visible inside the parent view, even if it introduces additional blank areas (centered).

Default​

"cover"

Defined in​

types/CameraProps.ts:175

torch?​

optional torch: "off" | "on"

Set the current torch mode.

Make sure the given device has a torch (see device.hasTorch).

Default​

"off"

Defined in​

types/CameraProps.ts:118

video?​

optional video: boolean

Enables video capture with the startRecording function (see "Recording Videos")

Defined in​

types/CameraProps.ts:79

videoBitRate?​

optional videoBitRate: number | "extra-low" | "low" | "normal" | "high" | "extra-high"

The bit-rate for encoding the video into a file, in Mbps (Megabits per second).

Bit-rate is dependant on various factors such as resolution, FPS, pixel format (whether it's 10 bit HDR or not), and video codec.

By default, it will be calculated by the hardware encoder, which takes all those factors into account.

  • extra-low: 40% lower than whatever the hardware encoder recommends.
  • low: 20% lower than whatever the hardware encoder recommends.
  • normal: The recommended value by the hardware encoder.
  • high: 20% higher than whatever the hardware encoder recommends.
  • extra-high: 40% higher than whatever the hardware encoder recommends.
  • number: Any custom number for the bit-rate, in Mbps.

Default​

'normal'

Defined in​

types/CameraProps.ts:219

videoHdr?​

optional videoHdr: boolean

Enables or disables HDR Video Streaming for Preview, Video and Frame Processor via a 10-bit wide-color pixel format.

Make sure the given format supports HDR (see format.supportsVideoHdr).

Defined in​

types/CameraProps.ts:202

videoStabilizationMode?​

optional videoStabilizationMode: VideoStabilizationMode

Specifies the video stabilization mode to use.

Make sure the given format supports the given videoStabilizationMode.

Defined in​

types/CameraProps.ts:275

zoom?​

optional zoom: number

Specifies the zoom factor of the current camera, in "factor"/scale.

This value ranges from minZoom (e.g. 1) to maxZoom (e.g. 128). It is recommended to set this value to the CameraDevice's neutralZoom per default and let the user zoom out to the fish-eye (ultra-wide) camera on demand (if available)

Note: Linearly increasing this value always appears logarithmic to the user.

Default​

1.0

Defined in​

types/CameraProps.ts:130