Optional ReadonlytypeEncoded image MIME type. Defaults to image/jpeg.
Browsers are only required to support image/png; unsupported types fall
back to the browser's default encoding, which the capture reports back in
MediaFrameCapture.type.
Optional ReadonlyqualityLossy encoder quality between 0 and 1. Defaults to 0.92. Ignored by
lossless encoders such as image/png.
Encoder options for capturing the currently presented media frame.