timestamp_domain

[mengxz0203]

Hello,I want to know how to record a bag file with system_time but not global_time? I have tried several times but failed.

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Required Info
Camera Model	D400
Firmware Version	05.12.12.100
Operating System & Version	Win10
Kernel Version (Linux Only)	1909
Platform	PC
SDK Version	pyrealsense2
Language	python
Segment	Robot

Issue Description

I find timestamp_domain in the doc, but I don't know how to set system_time in viewer or with python code.

[mengxz0203]

After I uncheck the Global Time Enabled, clock domain becomes hardware

[MartyG-RealSense]

Hi @mengxz0203 The link below contains Python scripting for setting the status of global time.

#8112

Instead of setting rs.option.global_time_enabled to '1' (true) like the script does, use '0' instead to disable global time.

[mengxz0203]

@MartyG-RealSense I tried your code but the clock was hardware


so how to get system_time

[mengxz0203]

@MartyG-RealSense And I also want to know the difference between global_time and system_time, thanks a lot.

[MartyG-RealSense]

It looks as though your hardware clock image is from the RealSense Viewer. A Python program will not change any settings in the RealSense Viewer.

The global time setting toggles between Global Time when it is true and Hardware Clock (if supported) when it is false. Device time and system time are aligned when Global Time is enabled. The link below is a good reference about the workings of global time.

#4505 (comment)

System Time is a software timestamp that is used when hardware timestamps are not available (for example, if metadata support is not installed). If hardware timestamps are available, librealsense will take advantage of them.

#1294

On Windows, metadata support can be added using information in the link below, or more easily by instead using a pop-up box in the RealSense Viewer that may appear when launching it to request if you want to enable metadata support.

https://github.com/IntelRealSense/librealsense/blob/master/doc/installation_windows.md#enabling-metadata-on-windows

More information about how different timestamps function is here:

#2188 (comment)

[mengxz0203]

@MartyG-RealSense Thanks very much!