Where can we get VPU(MPP) usage

You can find it here:   https://github.com/rockchip-linux/mpp
And the samples in test folder:  https://github.com/rockchip-linu ... test/mpi_dec_test.c
gstreamer-rockchip is here: https://github.com/rockchip-linux/gstreamer-rockchip
But we don't recommend calling VPU via gstreamer, it's just a compatible API.

There is no way to check VPU usage(%), but you can check the processing time per frame using :

echo 0x0100 > /sys/module/rk_vcodec/parameter/debug

You can find the processing time by command 'dmesg' after running your application.
(It is about 2-4ms for 1080P h264 frame)