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107 lines
3.0 KiB
Python
Executable File
107 lines
3.0 KiB
Python
Executable File
#! /usr/bin/env python
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import sys
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# import the necessary things for OpenCV
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from opencv import cv
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from opencv import highgui
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# the codec existing in cvcapp.cpp,
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# need to have a better way to specify them in the future
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# WARNING: I have see only MPEG1VIDEO working on my computer
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H263 = 0x33363255
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H263I = 0x33363249
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MSMPEG4V3 = 0x33564944
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MPEG4 = 0x58564944
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MSMPEG4V2 = 0x3234504D
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MJPEG = 0x47504A4D
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MPEG1VIDEO = 0x314D4950
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AC3 = 0x2000
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MP2 = 0x50
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FLV1 = 0x31564C46
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#############################################################################
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# so, here is the main part of the program
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if __name__ == '__main__':
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# a small welcome
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print "OpenCV Python capture video"
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# first, create the necessary window
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highgui.cvNamedWindow ('Camera', highgui.CV_WINDOW_AUTOSIZE)
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# move the new window to a better place
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highgui.cvMoveWindow ('Camera', 10, 10)
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try:
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# try to get the device number from the command line
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device = int (sys.argv [1])
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# got it ! so remove it from the arguments
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del sys.argv [1]
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except (IndexError, ValueError):
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# no device number on the command line, assume we want the 1st device
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device = 0
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if len (sys.argv) == 1:
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# no argument on the command line, try to use the camera
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capture = highgui.cvCreateCameraCapture (device)
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else:
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# we have an argument on the command line,
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# we can assume this is a file name, so open it
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capture = highgui.cvCreateFileCapture (sys.argv [1])
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# check that capture device is OK
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if not capture:
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print "Error opening capture device"
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sys.exit (1)
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# capture the 1st frame to get some propertie on it
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frame = highgui.cvQueryFrame (capture)
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# get size of the frame
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frame_size = cv.cvGetSize (frame)
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# get the frame rate of the capture device
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fps = highgui.cvGetCaptureProperty (capture, highgui.CV_CAP_PROP_FPS)
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if fps == 0:
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# no fps getted, so set it to 30 by default
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fps = 30
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# create the writer
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writer = highgui.cvCreateVideoWriter ("captured.mpg", MPEG1VIDEO,
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fps, frame_size, True)
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# check the writer is OK
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if not writer:
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print "Error opening writer"
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sys.exit (1)
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while 1:
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# do forever
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# 1. capture the current image
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frame = highgui.cvQueryFrame (capture)
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if frame is None:
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# no image captured... end the processing
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break
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# write the frame to the output file
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highgui.cvWriteFrame (writer, frame)
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# display the frames to have a visual output
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highgui.cvShowImage ('Camera', frame)
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# handle events
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k = highgui.cvWaitKey (5)
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if k % 0x100 == 27:
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# user has press the ESC key, so exit
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break
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# end working with the writer
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# not working at this time... Need to implement some typemaps...
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# but exiting without calling it is OK in this simple application
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#highgui.cvReleaseVideoWriter (writer)
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