Are there any hidden dangers in use TEGRA_CAMERA_CID_LOW_LATENCY mode by v4l2 on TX2NX

Robotics & Edge Computing Jetson & Embedded Systems Jetson TX2
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https://forums.developer.nvidia.com/t/tx2-the-camera-delay-n-2-frame/116830/5，

When using v4l2, we found that the default mechanism was to use the release buffer N at N+2 frame start event mechanism. However, we unexpectedly discovered that a low latency mode was already present in version 32.7.2 to improve this issue. Therefore, I have two questions to ask:

  1. What is the purpose of the N+2 frame mechanism?

  2. Are there any drawbacks to using low latency mode?

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  1. Add this for some special use case. AKA for improving latency.
  2. Didn’t have fully test for this mode. Only have fully test for the default mode.

Thanks

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Hi,
Thank you for the reply.
Regarding the first question, why does the default mode delay by two frames.

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Let sensor have 2 frames time for the gain/exposure take effect.

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So if our automatic exposure and gain are implemented at the hardware level, then theoretically there won’t be much impact in low latency mode?

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Suppose yes

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Thank you

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