canvas.captureStream() show black background

[Yadavendra Yadav]

Hi All,

First of all thank you for paying attention.

I was trying to stream my canvas element. So, I've use canvas.captureStream().. It streams the video perfectly. but this video background is black, and I need it white, bcoz, I'm using it for the whiteboard.

Input: 

Output:

But i need the white background in my video.
Can anyone please help me.

Thanks in advance.