convertImageData.ts

const convertImageData = (
  imageData: ImageData,
  frame: any,
  cv: any,
  videoSize: any
) => {
  if (!(frame instanceof cv.Mat)) {
    throw new Error("Please input the valid cv.Mat instance.");
    return;
  }
  if (frame.type() !== cv.CV_8UC4) {
    throw new Error("Bad type of input mat: the type should be cv.CV_8UC4.");
    return;
  }
  if (frame.cols !== videoSize.width || frame.rows !== videoSize.height) {
    throw new Error(
      "Bad size of input mat: the size should be same as the video."
    );
    return;
  }
  console.log(imageData);

  return frame.data.set(imageData.data);
};