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How to change global alpha mode on the fly

Question asked by Ivy Liu on Nov 16, 2016
Latest reply on Nov 29, 2016 by Ivy Liu

Hi All,

 

I am working on I.MX6 sabre board Quad now with a demo to display picture in picture with 2 camera inputs.

 

The demo is working and I even can swap the foreground and the background video on the fly.

 

But the foreground window is always transparent no matter which video input is from.

 

I used global alpha to make one video output to be opaque. But in this way, the other video output window is hidden when this one becomes the background.

 

Is there a way that I can change global alpha or turn off/on it on the fly?

 

The demo that I want to do is picture in picture, the foreground one is opaque, and swap the foreground and the background video on the fly.

 

 Thanks!!

 

Best Regards,

 

Ivy

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