ImageCapture: getPhotoSettings() method

None.

A Promise that resolves with an object containing the following properties:

fillLightMode

The flash setting of the capture device, one of "auto", "off", or "flash".

imageHeight

The desired image height as an integer. The browser selects the closest width value to this setting if it only supports discrete heights.

imageWidth

The desired image width as an integer. The browser selects the closest width value to this setting if it only supports discrete widths.

redEyeReduction

A boolean indicating whether the red-eye reduction should be used if it is available.

InvalidStateError DOMException

Thrown if readyState property of the MediaStreamTrack passing in the constructor is not live.

OperationError DOMException

Thrown if the operation can't complete for any reason.

The following example, extracted from Chrome's Image Capture / Photo Resolution Sample, uses the results from getPhotoSettings() to modify the size of an input range. This example also shows how the ImageCapture object is created using a MediaStreamTrack retrieved from a device's MediaStream.

const input = document.querySelector('input[type="range"]');

let imageCapture;

navigator.mediaDevices
  .getUserMedia({ video: true })
  .then((mediaStream) => {
    document.querySelector("video").srcObject = mediaStream;

    const track = mediaStream.getVideoTracks()[0];
    imageCapture = new ImageCapture(track);

    return imageCapture.getPhotoCapabilities();
  })
  .then((photoCapabilities) => {
    const settings = imageCapture.track.getSettings();

    input.min = photoCapabilities.imageWidth.min;
    input.max = photoCapabilities.imageWidth.max;
    input.step = photoCapabilities.imageWidth.step;

    return imageCapture.getPhotoSettings();
  })
  .then((photoSettings) => {
    input.value = photoSettings.imageWidth;
  })
  .catch((error) => console.error("Argh!", error.name || error));