A error in " Running the Docker Container"

Following the steps in " Running the Docker Container", the following error is displayed when Running #./video-viewer /dev/video0 in “Running Applications”
[gstreamer] gstCamera – didn’t discover any v4l2 devices
[gstreamer] gstCamera – device discovery failed, but /dev/video0 exists
[gstreamer] support for compressed formats is disabled
[gstreamer] gstCamera – unsupported codec requested (unknown)
[gstreamer] supported decoder codecs are:
[gstreamer] * h264
[gstreamer] * h265
[gstreamer] * vp8
[gstreamer] * vp9
[gstreamer] * mpeg2
[gstreamer] * mpeg4
[gstreamer] * mjpeg
[gstreamer] gstCamera failed to build pipeline string
[gstreamer] gstCamera – failed to create device v4l2:///dev/video0
video-viewer: failed to create input stream

Hi @djqabcdefg, which camera do you have attached? Is it MIPI CSI or USB? If it’s the later, can you tell me what this prints out?

$ sudo apt-get install v4l-utils
$ v4l2-ctl --device=/dev/video0 --list-formats-ext

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