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google-coral / examples-camera

Small code snippets that show how to stream camera images to a Coral device.
Apache License 2.0
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Coral camera doesn't work on fresh flash of Coral dev board #74

Closed strubell closed 3 years ago

strubell commented 3 years ago

I'm trying to figure out why I can't get the Coral camera to work on my dev board. I just tried re-flashing the dev board, but I'm getting the same error as before. The dev board can see the camera; when I run v4l2-ctl --list-devices I get the following output, which looks right:

i.MX6S_CSI (platform:30a90000.csi1_bridge):
        /dev/video0

but when I try to take a test picture with snapshot I get the following warning, then it hangs:

(gst-plugin-scanner:4650): GStreamer-WARNING **: 15:34:54.752: Failed to load plugin '/usr/lib/aarch64-linux-gnu/gstreamer-1.0/libgstchromaprint.so': /usr/lib/aarch64-linux-gnu/libgomp.so.1: cannot allocate memory in static TLS block

I also get a blank screen when I try to run the demos. It seems like a gstreamer library issue. Any pointers on how to go about debugging? Thanks!

strubell commented 3 years ago

If I run export LD_PRELOAD=/usr/lib/aarch64-linux-gnu/libgomp.so.1 before snapshot it stops producing that error, but doesn't solve the problem (snapshot still hangs and does not take a picture).

manoj7410 commented 3 years ago

@strubell What is the power supply that you are using ?

strubell commented 3 years ago

I've tried two different fast-charging usb-c power banks. One is the Jackery Explorer 160 Portable Power Station which shows the Coral is drawing 3 watts when plugged in.

manoj7410 commented 3 years ago

Minimum requirement is 2Amp 5V, Is your adaptor/power bank meeting these requirements?

strubell commented 3 years ago

Yes, it provides 3A/5V.

On Mon, May 31, 2021 at 10:33 AM Manoj @.***> wrote:

Minimum requirement is 2Amp 5V, Is your adaptor/power bank meeting these requirements?

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strubell commented 3 years ago

It looks like an issue with gstreamer plugins so I tried running:  sudo apt-get install --reinstall gstreamer-1.0 gstreamer1.0-plugins-bad gstreamer1.0-plugins-base gstreamer1.0-plugins-good gstreamer1.0-plugins-ugly

This seems to have gotten somewhere, as that install hangs on what I assume is a custom dpkg trigger related to the snapshot command: Processing triggers fsnapshot

strubell commented 3 years ago

I ordered a new camera, and it works. The hardware was defective.