stopStreams() {
			if (this.stream) {
				this.stream.getVideoTracks().forEach(t => t.stop());
				this.stream = undefined;
			}
			if (this._stopAsyncDecode === false) {
				this.stopAsyncDecode();
			}
			if (this._stopContinuousDecode === false) {
				this.stopContinuousDecode();
			}
		}
Stops the continuous scan and cleans the stream.