--- a/scripts/play-video.py	Wed Jun 22 15:23:20 2016 -0400
+++ b/scripts/play-video.py	Wed Jun 22 16:36:12 2016 -0400
@@ -7,7 +7,7 @@
 parser = argparse.ArgumentParser(description='The program displays the video.')
 parser.add_argument('-i', dest = 'videoFilename', help = 'name of the video file', required = True)
 parser.add_argument('-f', dest = 'firstFrameNum', help = 'number of first frame number to display', default = 0, type = int)
-parser.add_argument('--fps', dest = 'frameRate', help = 'approximate frame rate to replay', type = float)
+parser.add_argument('--fps', dest = 'frameRate', help = 'approximate frame rate to replay', default = -1, type = float)
 parser.add_argument('-r', dest = 'rescale', help = 'rescaling factor for the displayed image', default = 1., type = float)
 parser.add_argument('-s', dest = 'step', help = 'display every s image', default = 1, type = int)
 
@@ -17,8 +17,4 @@
 if args.firstFrameNum is not None:
     firstFrameNum = args.firstFrameNum
 
-frameRate = -1
-if args.frameRate is not None:
-    frameRate = args.frameRate
-
-cvutils.playVideo([args.videoFilename], None, firstFrameNum, frameRate, rescale = args.rescale, step = args.step)
+cvutils.playVideo([args.videoFilename], None, [firstFrameNum], args.frameRate, rescale = args.rescale, step = args.step)