Kria Ubuntu: error time high discrepancy (even when running the normal event viewer) and random event viewer freezes

[dirksavage88]

Hello @KrishnaGaihre

I am running the yolov7 model on the kv260 but am having issues with the docker container.

For yolov 7 I am running the commands according to the guide, however it looks like after a few seconds of the viewer being open, the metavision event viewer freezes (possibly related to the TimeHigh descrepancy?).

When I run the normal event viewer, I also observe the same behavior (independent of yolo detection).

I originally ran the metavision viewer natively on petalinux before flashing the ubuntu image, I did not observe this issue.

I am running the following version of ubuntu:

Ubuntu 22.04.4 LTS

If it also helps, I notice this error:

"Failed to load module "canberra-gtk-module"

EDIT: the TimeHigh error is coming straight from the evt decoder: https://github.com/prophesee-ai/openeb/blob/0499c95d921755ab2085125a29750ef365e6e8ae/hal/cpp/include/metavision/hal/decoders/evt21/evt21_decoder.h#L260

Is this a petalinux vs Ubuntu issue with latency? The metavision viewer did not have these issues in petalinux at all: no freezes or failures to start (black screen).

[KrishnaGaihre]

Yes , viewer must work properly. Can you run the viewer at low environmental light? or no any object moving for few sec? Environmental lighting also effect sensor and when there is massive changes at surround light , it freezes the data capture pipeline cause huge (Mev) of data will be there.
Is your camera USB or MIPI? Have you run any bias_config JSON file which setup the bias? To downsample or filter the data density on acquisition, one can run the bias_config json files. For bias related support you have to write us at email - info@logictronix.com from company/org email.
Regards,
Krishna@LogicTronix

[dirksavage88]

@KrishnaGaihre this is a MIPI based IMX636. I have not run bias_config. Can confirm that if I change the lighting in the room it does freeze the data capture pipeline. The same freeze happens with a lot of movement close to the camera.