dai::node::NeuralNetwork passthrough?

dexter

The docs for this node shows input going through to passthrough output, but the passthrough type is ImgFrame.
Does passthrough only work when the input comes from e.g. a camera preview? When I send dai::NNData to the input it appears to not generate passthrough.
The reason I need the passthrough is to get the sequence number since it doesn't appear to be set on the output dai::NNData. I really thought it should be there on the output though.

erik

Hi dexter ,
I tried to repro and we have noticed a bug as well - the demo freezes for some reason (demo here: Otherwise the getSequenceNum and timestamp work as expected even with NNData and passthrough (on latest 2.20).
Thoughts?
Thanks, Erik

dexter

Thanks erik ,

Here is some example code for what I get. I tested it with 1.20.0 and got the following. Unfortunately the code becomes a bit messy will all options, but it's configurable with defines at the top.

This is what I get from the different configurations.

Camera preview feeds the network. Running detections and both network output and passthrough has the expected sequence number.

#define PREVIEW_FEED
//#define INPUT_PASSTHROUGH

<F3><F4><F5><F6><F7><F8><F9><D6><P6><F10><F11><F12><D9><P9><F13><F14><F15><F16><D13><P13><F17>...

Host creates network input from frame. Running detections, but network output always has sequence number zero. (No passthrough used. This is the solution I would prefer.)

//#define PREVIEW_FEED
//#define INPUT_PASSTHROUGH

<F3><F4><F5><F6><F7><F8><F9><D0><F10><F11><F12><F13><D0><F14><F15><F16><D0><F17>...

Host creates network input from frame. Single detection and preview then no more, output has sequence number zero, but passthrough has correct sequence number.

//#define PREVIEW_FEED
#define INPUT_PASSTHROUGH

<F3><F4><F5><F6><F7><F8><F9><D0><P3><F10><F11><F12><F13><F14><F15><F16><F17>...

erik

Hi dexter ,
Could you provide MRE for this (similar to the one I posted above)?
Thanks, Erik

dexter

Hi erik ,

I created 917