High FPS pi camera

I have a raspberry pi camera NoIR V2 and I want to grab 720p video with 120fps.

I use the same command as here :

gst-launch-1.0 -v nvarguscamerasrc exposuretimerange="1 1" gainrange="1 1" ! 'video/x-raw(memory:NVMM), format=NV12,width=1280, height=720, framerate=120/1' ! fpsdisplaysink video-sink=fakesink text-overlay=false

but I only reach 60 fps like the latest says. Why is this ?

120 fps has been removed in recent JetPack versions (since R32.5 I think).
You can get it working by rebuilding IMX219 driver in kernel and modifying device tree.
Here are the steps for Xavier NX, you would adapt for your Nano.

However, be aware that Argus will use about 1 CPU core just for this low resolution at 120 fps.
This may be the reason why it has been removed from JetPack.


Thank you for you answer. I built the kernel with success but I’m not able to boot on it. After editing extlinux.conf, I don’t see any prompt at booting. Do you have any hint why ?

You would use a serial console.

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I see, thank you ! I didn’t have one so I just replaced the older kernel with the custom one in extlinux.conf but it’s always good to know how it works.