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This UPM module captures a still frame from a Linux V4L device, such as a USB webcam, and and then allows you to save it as a JPEG image into a file. The camera and driver in use must support streaming, mmap-able buffers and must provide data in YUYV format. This should encompass most video cameras out there. It has been tested with a few off the shelf USB cameras without any problems. Signed-off-by: Jon Trulson <jtrulson@ics.com> Signed-off-by: Mihai Tudor Panu <mihai.tudor.panu@intel.com>
68 lines
2.2 KiB
Python
68 lines
2.2 KiB
Python
#!/usr/bin/python
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# Author: Jon Trulson <jtrulson@ics.com>
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# Copyright (c) 2016 Intel Corporation.
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#
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# Permission is hereby granted, free of charge, to any person obtaining
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# a copy of this software and associated documentation files (the
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# "Software"), to deal in the Software without restriction, including
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# without limitation the rights to use, copy, modify, merge, publish,
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# distribute, sublicense, and/or sell copies of the Software, and to
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# permit persons to whom the Software is furnished to do so, subject to
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# the following conditions:
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#
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# The above copyright notice and this permission notice shall be
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# included in all copies or substantial portions of the Software.
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#
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# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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# LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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# OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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# WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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import time, sys, signal, atexit
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import pyupm_vcap as sensorObj
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## Exit handlers ##
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# This function stops python from printing a stacktrace when you hit control-C
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def SIGINTHandler(signum, frame):
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raise SystemExit
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# This function lets you run code on exit
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def exitHandler():
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print "Exiting..."
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sys.exit(0)
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# Register exit handlers
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atexit.register(exitHandler)
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signal.signal(signal.SIGINT, SIGINTHandler)
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defaultDev = "/dev/video0"
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# if an argument was specified, use it as the device instead
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if (len(sys.argv) > 1):
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defaultDev = sys.argv[1]
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print "Using device", defaultDev
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print "Initializing..."
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# Instantiate an VCAP instance, using the specified video device
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sensor = sensorObj.VCAP(defaultDev)
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# enable some debug/verbose output
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sensor.setDebug(True);
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# This is just a hint. The kernel can change this to a lower
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# resolution that the hardware supports. Use getWidth() and
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# getHeight() methods to see what the kernel actually chose if you
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# care.
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sensor.setResolution(1920, 1080);
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# capture an image
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sensor.captureImage();
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# convert and save it as a jpeg
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sensor.saveImage("video-img1.jpg");
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