Raspberry Pi Forums

Hi,

I want to add some information over a video stream such as text and 2D shapes. It has to be fast, minimizing the delay on the video stream.

I know RPi has some graphics programming libraries such as OpenGL ES and OpenVG, both with some python wrappers.

According to your experience, do you think I need to use hardware acceleration to draw an overlay similar to this: http://www.rc-eagleeye.cz/fotky1129/fot ... screen.jpg at ~30fps in HD? What would be the best library to do it, and could I use a python wrapper, or would be the performance drop be too significant ?

Thanks !

Hi,

Finally, I used Qt5 with QML to make the overlay (using HW acceleration) and picamera to show the video on screen.

Bye

and do you have a video showing it?

Hi...can you share your Project?