rockchip-linux
H264/H265 encoding latency
Hello, I am wondering if it is possible to measure the encoding latency (delta between frame N in -> frame N out) by just measuring the time it takes until MppEncoder::process() returns.
Or is the following possible with rv1126 encoder hw: put in frame 0 -> get out nothing put in frame 1 -> get out frame 0 put in frame 2 -> get out frame 1
(e.g. encoder buffers 1 or more frames).
Because on the rpi encoder for example, the encoding process is pipelined.
To show task timing setprop mpp_debug 1 or export mpp_debug=1. The encoder put/get function is block mode only. The non-block mode need to notify when the input buffer is at end of usage.
Is that the same as doing: echo 0x100 > /sys/module/rk_vcodec/parameters/mpp_dev_debug As described here: https://github.com/rockchip-linux/mpp/issues/154 ? After doing so, I think I get the encoding latency from dmesg:
Can you do the same for the isp ? e.g. processing time for a frame on isp ?
rk_vcodec is part of mpp. The timing is the hardware encoding time for each encoding task. The latency contain hardware working time and software time.
https://github.com/rockchip-linux/mpp/blob/5b1156a47bc81462ce5d7c600d5a15b338dd4d82/mpp/mpp.cpp#L453-L456 Here you can enable the total timing record when mpp encoding one frame.
thanks. Can you point me in the right direction regarding isp or do you not know how ?