video-rotate.py

#!/usr/bin/env python2
"""
SYNOPSIS

    video-rotate [-h,--help] [-v,--verbose] [--version]

DESCRIPTION

    Rotate a video around the x-axis.  Frames are output as PNG files
    but can be reconstructed into a video with ffmpeg or another
    similar tool.

EXAMPLES

    video-rotate input-video-file

EXIT STATUS

    TODO: List exit codes

AUTHOR

    David E. Shere <[email protected]>

LICENSE

    Copyright (c) 2014 David E. Shere <[email protected]>

    Permission is hereby granted, free of charge, to any person obtaining a copy
    of this software and associated documentation files (the "Software"), to deal
    in the Software without restriction, including without limitation the rights
    to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
    copies of the Software, and to permit persons to whom the Software is
    furnished to do so, subject to the following conditions:

    The above copyright notice and this permission notice shall be included in
    all copies or substantial portions of the Software.

    THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
    IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
    FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
    AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
    LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
    OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
    THE SOFTWARE.

VERSION

    0.1
"""

import sys, os, traceback, optparse
import time
import re
import cv
import cv2
import numpy

def main ():

    global options, args

    if len(args) != 1:
        sys.exit('Usage: %s input-video-file' % sys.argv[0])

    if not os.path.exists(args[0]):
        sys.exit('ERROR: File %s was not found!' % args[0])

    vc_src = cv2.VideoCapture(args[0])
    width  = int(vc_src.get(cv.CV_CAP_PROP_FRAME_WIDTH))
    src_height = int(vc_src.get(cv.CV_CAP_PROP_FRAME_HEIGHT))
    dst_height = int(vc_src.get(cv.CV_CAP_PROP_FRAME_COUNT))

    frame_dst = numpy.array([], dtype=numpy.uint8)
    frame_dst.resize((dst_height, width, 3))

    j = 0
    rval = True
    while rval and j < src_height:
        print "Frame %d"%j
        for i in range(0, dst_height):
            rval, frame_src = vc_src.read()
            frame_dst[i] = frame_src[j]
        vc_src.set(cv.CV_CAP_PROP_POS_FRAMES, 0)
        cv2.imwrite("frame_%0.5d.png"%j, frame_dst)
        j = j + 1

if __name__ == '__main__':
    try:
        start_time = time.time()
        parser = optparse.OptionParser(formatter=optparse.TitledHelpFormatter(),
                usage=globals()['__doc__'], version='0.1')
        parser.add_option ('-v', '--verbose', action='store_true', default=False, help='verbose output')
        (options, args) = parser.parse_args()
        #if len(args) < 1:
        #    parser.error ('missing argument')
        if options.verbose: print time.asctime()
        main()
        if options.verbose: print time.asctime()
        if options.verbose: print 'TOTAL TIME IN MINUTES:',
        if options.verbose: print (time.time() - start_time) / 60.0
        sys.exit(0)
    except KeyboardInterrupt, e: # Ctrl-C
        raise e
    except SystemExit, e: # sys.exit()
        raise e
    except Exception, e:
        print 'ERROR, UNEXPECTED EXCEPTION'
        print str(e)
        traceback.print_exc()
        os._exit(1)