Illegal base64 character in webcam image

Questions
1

I was attempting to use the webcam package and followed the example as in the webinar (https://www.youtube.com/watch?v=d2ZUVOjmI-w&feature=emb_logo) when I came across this error when trying to save the captured image from the webcam.
In developer the data returned is of type {JSMedia} has these characters at the beginning:

"data:image/jpeg;base64,/9j/4AA...."

The URI format is data:[][;base64],
the handler for the capture call back is (where the var is a form var defined as media):

function getBase64Data_from_webcam_4(data) {
	vf_cam_image = data;
	return;
}

I tried to convert it to a byte array:

var img_byte_array = utils.base64ToBytes(vf_cam_image)

and get this error message:

exception= java.lang.IllegalArgumentException: Illegal base64 character 3a

The ascii for 3a is the colon (:). I scanned the part and did not find any more.
So does this mean the webcam component is incorrect or is it the utils method that is out of date for JSMedia type?

I am using servoy 2020.12.1 and the latest package: svywebcam (1.0.4)
I have no insight as to how to fix this issue.
Any ideas?
Tom

2

OK so I think I have figured it out.
The prefix has to be ignored. So I take the substring after the comma (“,”) and then convert to a JSImage then I can store that result to a database table column.