I have a question about the depth-delay of k4arecorder.exe. I saw that the manual did not use the depth delay option when recording with multiple devices, like k4arecorder.exe --device 1 --external-sync subordinate --imu OFF -e -8 -r 5 -l 5 output-2.mkv k4arecorder.exe --device 0 --external-sync master --imu OFF -e -8 -r 5 -l 5 output-1.mkv I want to know if the option depth-delay is not need ?

Jianxin xiao Greetings! The --depth-delay option in k4arecorder.exe is used to adjust the delay between the depth and color cameras. This option is useful when the depth camera is physically located at a different position than the color camera, and the delay between the two cameras needs to be adjusted to align the captured data. In the case of recording with multiple devices using external synchronization, the depth and color cameras are already synchronized by the external sync signal, so the --depth-delay option is not needed. The external sync signal ensures that the depth and color cameras of all devices are synchronized, so there is no need to adjust the delay between them. For more information on k4arecorder.exe and its options, you can refer to Use Azure Kinect Sensor SDK to record file format . Do let me know if that helps or have any further questions.

a question about using k4arecorder.exe

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AshokPeddakotla-MSFT 34,701 Reputation points

2024-02-26T10:36:51.39+00:00

Jianxin xiao Greetings!

The --depth-delay option in k4arecorder.exe is used to adjust the delay between the depth and color cameras. This option is useful when the depth camera is physically located at a different position than the color camera, and the delay between the two cameras needs to be adjusted to align the captured data.

In the case of recording with multiple devices using external synchronization, the depth and color cameras are already synchronized by the external sync signal, so the --depth-delay option is not needed. The external sync signal ensures that the depth and color cameras of all devices are synchronized, so there is no need to adjust the delay between them.

For more information on k4arecorder.exe and its options, you can refer to Use Azure Kinect Sensor SDK to record file format.

Do let me know if that helps or have any further questions.
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Jianxin xiao 60 Reputation points

2024-02-26T10:43:53.3466667+00:00

Thanks to your response. So it means that when I use k4arecorder.exe to get the .mkv files, I don't need to worry about interference between multiple depth cameras?

AshokPeddakotla-MSFT 34,701 Reputation points

2024-02-26T11:26:29.48+00:00

Jianxin xiao When you use k4arecorder.exe to record with multiple Azure Kinect devices, you need to make sure that the devices are properly synchronized to avoid interference between the depth cameras.

Also, make sure that the devices are properly positioned and calibrated to avoid interference between the depth cameras. See Use Azure Kinect recorder with external synchronized devices and Avoiding interference between multiple depth cameras

Do let me know if that helps or have any other queries.

If the response helped, please do click Accept Answer and Yes for was this answer helpful.

Jianxin xiao 60 Reputation points

2024-02-26T11:47:32.5766667+00:00

Thanks to your response. But I'm also wander the function of the --sync-delay option. If this option is used(like --sync-delay 1 ), does it mean that when the master device sends a synchronization signal, the subordinate device will delay the capture by 1 millisecond? Does this option accept decimals (like --sync-delay 0.2 )?

AshokPeddakotla-MSFT 34,701 Reputation points

2024-03-07T09:42:02.79+00:00

Yes, you are correct! The --sync-delay option in k4arecorder.exe is used to introduce a delay in the capture start time of the subordinate device after receiving the sync signal from the master device.

Regarding your second question, I'm not sure about the --sync-delay option accepting decimal values. You can try specify the delay in milliseconds with up to one decimal place, like --sync-delay 0.2 and try.

Do let me know if you have any further queries.

If the response helped, please do click Accept Answer and Yes for was this answer helpful.

Jianxin xiao 60 Reputation points

2024-03-07T09:57:00.4533333+00:00

Oh！Thanks a lot.
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