when running above python code, it returns error as below:
Error generated. /dvs/git/dirty/git-master_linux/multimedia/nvgstreamer/gst-nvarguscamera/gstnvarguscamerasrc.cpp, execute:557 No cameras available
[ WARN:0] global /home/nvidia/host/build_opencv/nv_opencv/modules/videoio/src/cap_gstreamer.cpp (933) open OpenCV | GStreamer warning: Cannot query video position: status=0, value=-1, duration=-1
same issue it can’t find the camera.
Here are other output for your reference:
$ v4l2-ctl --list-formats-ext
ioctl: VIDIOC_ENUM_FMT
Index : 0
Type : Video Capture
Pixel Format: ‘RGGB’
Name : 8-bit Bayer RGRG/GBGB
Size: Discrete 1280x1024
Interval: Discrete 0.033s (30.000 fps)
$ media-ctl -p
Media controller API version 0.1.0
Media device information
driver tegra194-vi5
model NVIDIA Tegra Video Input Device
serial
bus info
hw revision 0x3
driver version 0.0.0
Device topology
-
entity 1: sc130gs 9-0030 (1 pad, 1 link)
type V4L2 subdev subtype Sensor flags 0
device node name /dev/v4l-subdev0
pad0: Source
[fmt:SRGGB8_1X8/1280x1024 field:none colorspace:srgb]
→ “15a00000.nvcsi–2”:0 [ENABLED] -
entity 3: 15a00000.nvcsi–2 (2 pads, 2 links)
type V4L2 subdev subtype Unknown flags 0
device node name /dev/v4l-subdev1
pad0: Sink
← “sc130gs 9-0030”:0 [ENABLED]
pad1: Source
→ “vi-output, sc130gs 9-0030”:0 [ENABLED] -
entity 6: vi-output, sc130gs 9-0030 (1 pad, 1 link)
type Node subtype V4L flags 0
device node name /dev/video0
pad0: Sink
← “15a00000.nvcsi–2”:1 [ENABLED] -
entity 18: sc130gs 10-0030 (1 pad, 1 link)
type V4L2 subdev subtype Sensor flags 0
device node name /dev/v4l-subdev2
pad0: Source
[fmt:SRGGB8_1X8/1280x1024 field:none colorspace:srgb]
→ “15a00000.nvcsi–1”:0 [ENABLED] -
entity 20: 15a00000.nvcsi–1 (2 pads, 2 links)
type V4L2 subdev subtype Unknown flags 0
device node name /dev/v4l-subdev3
pad0: Sink
← “sc130gs 10-0030”:0 [ENABLED]
pad1: Source
→ “vi-output, sc130gs 10-0030”:0 [ENABLED] -
entity 23: vi-output, sc130gs 10-0030 (1 pad, 1 link)
type Node subtype V4L flags 0
device node name /dev/video1
pad0: Sink
← “15a00000.nvcsi–1”:1 [ENABLED]
Thanks,
hal.