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README: Add short testing instructions with cam

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The README.rst file contains the getting started instructions, but lacks
a simple way to test libcamera. Add a short section about basic cam
usage.

Suggested-by: Pavel Machek <pavel@ucw.cz>
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
Reviewed-by: Jacopo Mondi <jacopo@jmondi.org>
This commit is contained in:
Laurent Pinchart 2022-06-21 15:24:16 +03:00
parent e135db8cb4
commit bb84fc6a74
1 changed files with 15 additions and 0 deletions
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15
README.rst
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@ -101,6 +101,21 @@ for android: [optional]
for lc-compliance: [optional]
libevent-dev
Basic testing with cam utility
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
The ``cam`` utility can be used for basic testing. You can list the cameras
detected on the system with ``cam -l``, and capture ten frames from the first
camera and save them to disk with ``cam -c 1 --capture=10 --file``. See
``cam -h`` for more information about the ``cam`` tool.
In case of problems, a detailed debug log can be obtained from libcamera by
setting the ``LIBCAMERA_LOG_LEVELS`` environment variable:
.. code::
:~$ LIBCAMERA_LOG_LEVELS=*:DEBUG cam -l
Using GStreamer plugin
~~~~~~~~~~~~~~~~~~~~~~