AGX orin latency checking and Optimization | DRM | L4T 35.4.1

[vedig1997]

Hi Everyone,

I am using an AGX Orin with L4T version 35.4.1 and streaming to DRM using the following GStreamer command. I am using an external ISP.

gst-launch-1.0 nvv4l2camerasrc device=/dev/video0 ! ‘video/x-raw(memory:NVMM), format=(string)UYVY, width=(int)3840, height=(int)2160, framerate=(fraction)30/1’ ! queue ! nvdrmvideosink

When I check the latency (the total time from the camera to display), it is around 86ms.

Is this the lowest latency possible?
Are there any ways to improve this latency?

Thanks in advance for your suggestions!

[carolyuu]

Hi,

For the camera basic functionality first needs to check the device and driver configuration.
You can reference to below program guide for the detailed information of device tree and driver implementation.
https://docs.nvidia.com/jetson/archives/r36.3/DeveloperGuide/SD/CameraDevelopment/SensorSoftwareDriverProgramming.html?highlight=programing#sensor-software-driver-programming

Please refer to Applications Using V4L2 IOCTL Directly by using V4L2 IOCTL to verify basic camera functionality.
https://docs.nvidia.com/jetson/archives/r36.3/DeveloperGuide/SD/CameraDevelopment/SensorSoftwareDriverProgramming.html?highlight=programing#to-run-a-v4l2-ctl-test

Once confirm the configure and still failed below link help to get log and some information and some tips for debug.
https://elinux.org/Jetson/l4t/Camera_BringUp#Steps_to_enable_more_debug_messages

Thanks!