--- a/scripts/polytracktopdtv.py	Fri Jun 01 10:43:23 2018 -0400
+++ b/scripts/polytracktopdtv.py	Fri Jun 01 10:47:49 2018 -0400
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#! /usr/bin/env python3
 
 from pdtv import TsaiCamera, ZipVideo, SyncedVideos, TrackSet, Track, State
 import sys, os, datetime, argparse
@@ -68,7 +68,6 @@
     frameList = cvutils.getImagesFromVideo(videoFile, firstFrameNum = currentIdx, nFrames = inc)
     
     while len(frameList) == inc and inc > 0:
-        
         for f in frameList:
             cv2.imwrite(os.path.join(framePath,time.strftime("%Y%m%d-%H%M%S.%f")[:-3]+'.jpg'), f)
             time += datetime.timedelta(microseconds=deltaTimestamp*1000)
@@ -80,7 +79,7 @@
                 inc = delta        
         if inc:
             frameList = cvutils.getImagesFromVideo(videoFile, firstFrameNum = currentIdx, nFrames = inc)
-        print('Extracting frame ' + str(currentIdx))
+        print('Extracting frame {}'.format(currentIdx))
     return len(frameList) > 0
 
     
@@ -115,7 +114,7 @@
     
     if videoFile is not None:
         fps = cvutils.getFPS(videoFile)
-        print('Video should run at ' + str(fps) + ' fps')
+        print('Video should run at {} fps'.format(fps))
         deltaTimestamp = 1000.0/float(fps);
         if videoFolderExist == False:
             if os.path.exists(videoFolderPath):