How to find read the contents of usb_camera.py in the Juperlab

[murray]

Thanks @dusty_nv

I had previously use, lsusb -s 001:002 -v | egrep “Width|Height” which gave me less detail but the same camera sizes.

Just to be sure I changed the capture to be the same as the camera:
camera = USBCamera(width=640, height=480, capture_width=640, capture_height=480, capture_device=0)

But its still the same error.

So I tried :

• guvcview
  Opening in BLOCKING MODE
  Segmentation fault (core dumped)

• cheese
  Unable to init server: Could not connect: Connection refused

** (cheese:6695): ERROR **: 22:14:27.087: cheese-application.vala:86: Unable to initialize libcheese-gtk
Trace/breakpoint trap (core dumped)

• ffplay /dev/video0
  Segmentation fault (core dumped)

These all work on Linux Mint machine, ffplay might have a hint with the terminal output?
Input #0, video4linux2,v4l2, from ‘/dev/video1’:B sq= 0B f=0/0
Duration: N/A, start: 36283.717558, bitrate: N/A
Stream #0:0: Video: mjpeg, yuvj420p(pc, bt470bg/unknown/unknown), 640x360, 30 fps, 30 tbr, 1000k tbn, 1000k tbc
[swscaler @ 0x7f9918066bc0] deprecated pixel format used, make sure you did set range correctly

Interestingly running v4l2-ctl on a Linux Mint machine gives 2 different video formats and the Nano only has MJPG?

From a Linux Mint machine
ioctl: VIDIOC_ENUM_FMT
Index : 0
Type : Video Capture
Pixel Format: ‘YUYV’
Name : YUYV 4:2:2
Size: Discrete 640x480
Interval: Discrete 0.033s (30.000 fps)
Size: Discrete 176x144
Interval: Discrete 0.033s (30.000 fps)
Size: Discrete 320x240
Interval: Discrete 0.033s (30.000 fps)
Size: Discrete 352x288
Interval: Discrete 0.033s (30.000 fps)
Size: Discrete 640x360
Interval: Discrete 0.033s (30.000 fps)
Size: Discrete 1280x720
Interval: Discrete 0.100s (10.000 fps)

Index       : 1
Type        : Video Capture
Pixel Format: 'MJPG' (compressed)
Name        : Motion-JPEG
	Size: Discrete 640x480
		Interval: Discrete 0.033s (30.000 fps)
	Size: Discrete 176x144
		Interval: Discrete 0.033s (30.000 fps)
	Size: Discrete 320x240
		Interval: Discrete 0.033s (30.000 fps)
	Size: Discrete 352x288
		Interval: Discrete 0.033s (30.000 fps)
	Size: Discrete 640x360
		Interval: Discrete 0.033s (30.000 fps)
	Size: Discrete 1280x720
		Interval: Discrete 0.033s (30.000 fps)

From the Jetson Nano
ioctl: VIDIOC_ENUM_FMT
Index : 0
Type : Video Capture
Pixel Format: ‘MJPG’ (compressed)
Name : Motion-JPEG
Size: Discrete 640x360
Interval: Discrete 0.033s (30.000 fps)
Interval: Discrete 0.040s (25.000 fps)
Interval: Discrete 0.067s (15.000 fps)
Size: Discrete 640x480
Interval: Discrete 0.033s (30.000 fps)
Interval: Discrete 0.040s (25.000 fps)
Interval: Discrete 0.067s (15.000 fps)
Size: Discrete 800x600
Interval: Discrete 0.033s (30.000 fps)
Interval: Discrete 0.040s (25.000 fps)
Interval: Discrete 0.067s (15.000 fps)
Size: Discrete 1024x768
Interval: Discrete 0.033s (30.000 fps)
Interval: Discrete 0.040s (25.000 fps)
Interval: Discrete 0.067s (15.000 fps)
Size: Discrete 1280x720
Interval: Discrete 0.033s (30.000 fps)
Interval: Discrete 0.040s (25.000 fps)
Interval: Discrete 0.067s (15.000 fps)
Size: Discrete 1280x960
Interval: Discrete 0.033s (30.000 fps)
Interval: Discrete 0.040s (25.000 fps)
Interval: Discrete 0.067s (15.000 fps)
Size: Discrete 1920x1080
Interval: Discrete 0.033s (30.000 fps)
Interval: Discrete 0.040s (25.000 fps)
Interval: Discrete 0.067s (15.000 fps)
Size: Discrete 1536x864
Interval: Discrete 0.033s (30.000 fps)
Interval: Discrete 0.040s (25.000 fps)
Interval: Discrete 0.067s (15.000 fps)
Size: Discrete 1600x900
Interval: Discrete 0.033s (30.000 fps)
Interval: Discrete 0.040s (25.000 fps)
Interval: Discrete 0.067s (15.000 fps)
Size: Discrete 1600x1200
Interval: Discrete 0.033s (30.000 fps)
Interval: Discrete 0.040s (25.000 fps)
Interval: Discrete 0.067s (15.000 fps)
An extract from dmesg on the Nano

12.415975] usb 1-2: New USB device found, idVendor=1d6b, idProduct=0104
[ 12.415981] usb 1-2: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[ 12.415985] usb 1-2: Product: Piwebcam
[ 12.415988] usb 1-2: Manufacturer: Show-me Webcam Project
[ 12.415991] usb 1-2: SerialNumber: 100000000d2386db
[ 12.447822] cdc_acm 1-2:2.2: ttyACM0: USB ACM device
[ 12.448211] usbcore: registered new interface driver cdc_acm
[ 12.448215] cdc_acm: USB Abstract Control Model driver for USB modems and ISDN adapters
[ 12.450630] uvcvideo: Found UVC 1.00 device Piwebcam (1d6b:0104)
[ 12.455437] uvcvideo 1-2:2.0: Entity type for entity Processing 2 was not initialized!
[ 12.463774] uvcvideo 1-2:2.0: Entity type for entity Camera 1 was not initialized!
[ 12.471755] input: Piwebcam as /devices/70090000.xusb/usb1/1-2/1-2:2.0/input/input4
[ 12.471970] usbcore: registered new interface driver uvcvideo
[ 12.471973] USB Video Class driver (1.1.1)

Perhaps a similar issue here but none of these fixes worked @DaneLLL

UVC USB3.0 Camera Not Initializing

Hi, i am trying to use 2 USB3.0 Cameras with sony IMX291 sensors to test the AI and stereo camera functions, but I’m running into problems getting the cameras initialized. I started with guvcview to see the video, but it cannot find the cameras. I got the tensor demo program to run, it sees the cameras, but I want to use the v42l-ctl to set exposure and frame rates. this is what I get from dmesg when I plug one in: [ 3217.839409] usb 2-1.3: new SuperSpeed USB device number 12 using tegra-xus…

Reinstalling uvcdynctrl didnt work either.

any idea why its not working on a Nano but does on other Linux machines?

Thanks