Select Timeout Issue When Testing

[nickkraus]

After installing, and running ./test_video_resource.py 0 I get the errors below, any ideas? I am using a SainSmart IMX219 Camera Module on Jetson Nano.

Trying to open resource: /dev/video0 Correctly opened resource, starting to show feed. select timeout select timeout OpenCV Error: Assertion failed (total() == 0 || data != NULL) in Mat, file /build/opencv-XDqSFW/opencv-3.2.0+dfsg/modules/core/include/opencv2/core/mat.inl.hpp, line 431 Traceback (most recent call last): File "./test_video_resource.py", line 43, in rval, frame = cap.read() cv2.error: /build/opencv-XDqSFW/opencv-3.2.0+dfsg/modules/core/include/opencv2/core/mat.inl.hpp:431: error: (-215) total() == 0 || data != NULL in function Mat

[awesomebytes]

That's an internal error of OpenCV, I'm guessing it's not able to extract an image (size 0 it reports?) from the device.

Does the camera work with some other software like 'cheese'?

Good luck!

[nickkraus]

Thanks for the quick reply! Image streams fine if I run:

gst-launch-1.0 nvarguscamerasrc ! 'video/x-raw(memory:NVMM),width=3820, height=2464, framerate=21/1, format=NV12' ! nvvidconv flip-method=0 ! 'video/x-raw,width=960, height=616' ! nvvidconv ! nvegltransform ! nveglglessink -e

from: https://github.com/JetsonHacksNano/CSI-Camera

In addition to this issue, when I run $ roslaunch video_stream_opencv camera.launch, I get a few other errors/warnings:

1. GLib-GObject-CRITICAL **: 21:49:43.015: g_object_unref: assertion 'G_IS_OBJECT (object)' failed (and G_IS_ELEMENT) and

2. A few moments later I get a bunch of VIDIOC_QBUF: Invalid argument messages

Its probably a system setup issue as opposed to an issue with the git repo. Just thought i'd post to see if you have seen it before.

[awesomebytes]

There is a different ROS package that uses GST to get access to the webcam. You configure it with your gst command. I forgot the name of the package but a quick Google surely will make you find it.

I think that may work better for you!

On Sat, Jan 18, 2020, 14:52 nickkraus notifications@github.com wrote:

Thanks for the quick reply! Image streams fine if I run:

gst-launch-1.0 nvarguscamerasrc ! 'video/x-raw(memory:NVMM),width=3820, height=2464, framerate=21/1, format=NV12' ! nvvidconv flip-method=0 ! 'video/x-raw,width=960, height=616' ! nvvidconv ! nvegltransform ! nveglglessink -e

from: https://github.com/JetsonHacksNano/CSI-Camera

In addition to this issue, when I run $ roslaunch video_stream_opencv camera.launch, I get a few issues:

1.

GLib-GObject-CRITICAL **: 21:49:43.015: g_object_unref: assertion 'G_IS_OBJECT (object)' failed (and G_IS_ELEMENT) and 2.

A few moments later I get a bunch of VIDIOC_QBUF: Invalid argument messages

Its probably a system setup issue as opposed to an issue with the git repo. Just thought i'd post to see if you have seen it before.

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[nickkraus]

Not a problem with the repo as far as I can tell. Similar issues when using gscam repo. Closing

[DanKamilov]

Not a problem with the repo as far as I can tell. Similar issues when using gscam repo. Closing

how do you resolve it? I have the same problem

[nickkraus]

Didn't resolve it. Havent gotten around to it in a while. Im suspicious of the ribbon cable connection although I doubt thats it considering I can get it to stream. I may try an ethernet or usb camera just to be sure.

[tjcheem]

I am having the same issue. it keeps printing "select timeout" when trying to use my usb webcam. Streaming in another app works fine. Any suggestions. I did not alter any files before running.