Nvargus Nvraw Tool couldn't recognize my sensor

Robotics & Edge Computing Jetson & Embedded Systems Jetson Xavier NX
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1

The only goal i want to do is to access metadata which its datatype is different from raw data from camera sensor.
I firstly use nvargus nvraw tool to test the ability of argus api to access metadata. But when i input the following command, it comes up some error.

pcai@pcai-desktop:~$ nvargus_nvraw --lps
nvargus_nvraw version 1.14.0
Number of supported sensor entries 0
Entry  Source Mode      Uniquename             Resolution   FR  BitDepth  Mode
Index  Index  Index                                             CSI Dyn   Type
pcai@pcai-desktop:~$ nvargus_nvraw  --c 0 --mode 0 --file /home/pcai/wxx.nvra
nvargus_nvraw version 1.14.0
("nvargus_nvraw") Error BadParameter (0x04): Provided sensor ID (0) is out of bounds. Total number of
     sensors: 0
 (in capture_nvraw/src/mobile/ArgusNvRawCapture.cpp, func initialize(), line 82)
("nvargus_nvraw") Error BadParameter (0x04): Unable to initialize (propagating from capture_nvraw/src/mobile/main.cpp,
     func main(), line 91)
pcai@pcai-desktop:~$ v4l2-ctl --list-formats-ext -d /dev/video0
ioctl: VIDIOC_ENUM_FMT
        Type: Video Capture

        [0]: 'RG12' (12-bit Bayer RGRG/GBGB)
                Size: Discrete 640x480
                        Interval: Discrete 0.033s (30.000 fps)
pcai@pcai-desktop:~$ v4l2-ctl --set-fmt-video=width=640,height=480,pixelformat=RG12 --stream-mmap --set-ctrl=sensor_mode=0 --stream-count=100 -d /dev/video0
<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<< 42.80 fps
<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
pcai@pcai-desktop:~$

Although my /devi/video0 can run normally, but nvargus_nvraw couldn’t recognize my sensor, and i don’t know how to locate the reason.
By the way, am I on the right track?
Thanks a lot.

3

Can anyone helps me? Thanks a lot.

4

Looks like argus don’t recognize any camera.
You may need to check the context of tegra-camear-platform{} special the devname strings.

Reference to below topic.

5

After fix dtsi bug, I could get metadata and raw data by using this command:

nvargus_nvraw  --c 0 --mode 0 --format "nvraw, raw" --file /home/pcai/test.nvraw

Now i want to use argus_api to implement this function. Is there any reference source code about how this tool implement this func?
Thanks a lot.

6

You can reference to the rawBayerOutput of MMAPI sample code.

Thanks

1 Like
7

Thanks for your guidance and advice!
I get only raw data with rawBayerOutput , and metadata with sensorPrivateMetadata. And my sensor works in continuous mode. Using this command,

nvargus_nvraw  --c 0 --mode 0 --format "nvraw, raw" --file /home/pcai/test.nvraw

i can get this three files:

pcai@pcai-desktop:~$ ls -l ~/test.*
-rw-rw-r-- 1 pcai pcai 618496 12月 15 18:18 /home/pcai/test.nvraw
-rw-rw-r-- 1 pcai pcai 616960 12月 15 18:18 /home/pcai/test.raw
-rw-rw-r-- 1 pcai pcai   1926 12月 15 18:18 /home/pcai/test.txt

The test.raw file contains 614400 bytes raw data and 2560 bytes metadata.
How these two types of data combined together?
Is there any mechanism to synchronize the two data inNvargus Nvraw Tool?
Thanks!

8

Use below API to get embedded data.

https://docs.nvidia.com/jetson/l4t-multimedia/classArgus_1_1Ext_1_1ISensorPrivateMetadata.html#ad5d098a7f14f18794ec53d3594d452a3

9

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