buraks

Hi, I have an Orange Pi Plus 2e and I've installed Armbian_5.59_Orangepiplus2e_Ubuntu_xenial_default_3.4.113_desktop. I need to play four hd videos at the same time. I could do it with Raspberry pi3 model B with 720M GPU memory. I played videos with MPV with X11 but couldn't play with VPDAU. It is just played only one video. What can I do? Can I set GPU memory? Thank you.