how to send custom video buffer to HDMI port

Hello ,everyone:
I want to send custom video data through HDMI port,but HDMI can just show the video of desktop.Can I gain control of HDMI like get the handle or some other ways?
Thank you very much!

Hi ccchen,

What do you mean “HDMI can just show the video of desktop”??

I mean I cannot access the sending frame buffer of HDMI.And I want to find some ways to send my custom video data?
Thank you very much!

If I understand your request correctly, you mean to render something onto HDMI monitor.

We have some multimedia framework that may help. For example, L4T Multimedia API Reference.

Most of them are C/C++ based.

The download link can be found here: