This issue seems to be related to RK3399 board only. If i run my application on another(RK3288) board, there hardware decoding is normal(ie. no color distortion). But if i run it on NanoPC T4 then color distortion happens. I have tried two images from FriendlyElec download section: ie. 1. rk3399-efl...

I am using mpp library to decode vp8 data, color distortion starts happening around the static part in the frame and then spread through the whole frame. H264 part works perfect. Is there anyone who has seen this kind of behaviour with VP8? Is there any specific setting needs to be done for VP8 in m...

Hi, i have RK3399 Friendly Elec board running ubuntu image(rk3399-eflasher-friendlydesktop-bionic-4.4-arm64-20180921) downloaded from FriendlyElec site itself. Now when i connect 4K Monitor using HDMI, xrandr doesn't show this mode. Maximum resolution shown by xrander is 1920x1080 only. How to enabl...

On NanoPC T4 board(bionic desktop image), i have LXDE and openbox desktop environment installed by default. Now i need to do some settings to make windows transparent so that their ordering doesn't hide lower windows completely On my other boards(Fedora and Ubuntu with openbox) i use below command t...

Rather than using mmap(), i tried another approach which makes data reading faster.

MppBuffer buffer = mpp_frame_get_buffer(frame);
base = (RK_U8 *)mpp_buffer_get_ptr(buffer);

Now use tihs 'base' pointer.

I have a use case where i need to split screen into 4 sections(tiles) and render different video in each tile. I don't know how to achieve compositing with DRM. So, i chose to do it using x11 windows+egl surface. I created x11 window. Video is decoded using mpp decoder(pure external mode) which give...