PhotoCapabilities

The PhotoCapabilities interface of the MediaStream Image Capture API provides available configuration options for an attached photographic device. A PhotoCapabilities object is retrieved by calling ImageCapture.getPhotoCapabilities().

PhotoCapabilities.redEyeReduction Read only

Returns one of "never", "always", or "controllable". The "controllable" value means the device's red-eye reduction is controllable by the user.

PhotoCapabilities.imageHeight Read only

Returns a MediaSettingsRange object indicating the image height range supported by the user agent.

PhotoCapabilities.imageWidth Read only

Returns a MediaSettingsRange object indicating the image width range supported by the user agent.

PhotoCapabilities.fillLightMode Read only

Returns an array of available fill light options. Options may include auto, off, or flash.

The following example, extracted from Chrome's Image Capture / Photo Resolution Sample, uses the results from getPhotoCapabilities() 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"]');

var 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.log('Argh!', error.name || error));