I use V4L2 to get the image data timestamp. When I get a frame, I use clock_getTime (CLOCK_MONOTONIC, &TV) to get the system power-up time. The two times will have a stable offset (15-25s). I think the reasons are: The TS of V4L2 comes from VI, and the TS of VI is calculated by TSC, which is the c…

The timestamp obtained by V4L2 has a stable bias when compared with the kernel's MONOTONIC time

Robotics & Edge Computing Jetson & Embedded Systems Jetson AGX Orin

JerryChang September 14, 2022, 3:11am 3

hello 308959219,

you cannot “fix” this since they’re using different timestamps.
may I know what’s the actual use-case? please refer to SensorTimestampTsc.h File Reference, you’re able to use the interface to get TSC HW timestamp.
please see-also Topic 159220 for code snippets of the demonstration.
thanks

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The timestamp obtained by V4L2 has a stable bias when compared with the kernel's MONOTONIC time

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