Simplest way to reduce CPU usage is to use video-for-Linux directly (it's
quite simple actually). This will give you access to the "raw" stream from the
camera, which is usually in YUV or MJPEG format (OpenCV forcibly converts
everything to RGB which makes for easy programming but horrible CPU consumption).
If the USB camera provides MJPEG or H264/H265 data, you can indeed use the VCU
to decode it. In theory.
For YUV data, you can use the MALI GPU or the programmable logic to convert it
to RGB (if you need RGB data to begin with...). The VCU isn't much use there.
For further CPU reduction, you'll have to use something else than USB (e.g.
mipi, dvi, hdmi, parallel data) directly into logic so the CPU isn't involved
in the data transfer at all.
On 04-06-19 06:48, Sami Md wrote:
Hi,
We are using Xilinx UltraScale UZ3EG MpSoc
we are using OpenCV to capture the video stream from USB Camera node /dev/video0
but the CPU utilization is not good, it consumes around 80% of the CPU.
To reduce the CPU consumption, we would like use the VCU available on UZ3EG.
Kindly let us know if there are any sample applications to demonstrate the
working of VCU.
any links would be helpful.
Thanks and Best Regards
Sami
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