get VdoBuffer too slow about acap-native-sdk-examples

[pataxis]

Hi @vuhailongkl97 , thank you for reaching out. We'll get back to you when we have had time to look in to your issue.

[Corallo]

Hello @vuhailongkl97

The application goes faster than 1fps, but as you see in your log, since the output is always the same, it is suppressed by the system log.
e.g. 2023-02-10T12:53:37.448+09:00 axis-b8a44f3a8b10 [ INFO ] opencv_app[979]: Last message 'Motion detected: YES' repeated 6 times, suppressed by syslog-ng on axis-b8a44f3a8b10

By only capturing the frames, you should get performances that are close to the camera frame rate settings (30 or 60 fps).
of course, if you process the frame on top of it, that will slow down your throughput. In the specific case of this application, I think
bgsub->apply(bgr_mat, fg, 0.005); is the responsible for the slowdown from 30 to 7-8 fps. You can double-check by adding a unique number to each print to avoid suppression.

On artpect-8 devices, the performances should be 2-3 times better.

[vuhailongkl97]

@Corallo Thank you, I got it.