expose threshold scores produced at detected shot boundaries

Modified __init__.py to print out the score associated with each
detected boundary and altered scene lists to track these scores.

scenedetect/__init__.py

@@ -28,6 +28,7 @@
 
 # Standard Library Imports
 from __future__ import print_function
+from __future__ import division
 import sys
 import os
 import argparse
@@ -350,10 +351,10 @@ def main():
 
     # Create new list with scene cuts in milliseconds (original uses exact
     # frame numbers) based on the video's framerate, and then timecodes.
-    scene_list_msec = [(1000.0 * x) / float(video_fps) for x in scene_list]
+    scene_list_msec = [(1000.0 * x[0]) / float(video_fps) for x in scene_list]
     scene_list_tc = [scenedetect.timecodes.get_string(x) for x in scene_list_msec]
     # Create new lists with scene cuts in seconds, and the length of each scene.
-    scene_start_sec = [(1.0 * x) / float(video_fps) for x in scene_list]
+    scene_start_sec = [(1.0 * x[0]) / float(video_fps) for x in scene_list]
     scene_len_sec = []
     if len(scene_list) > 0:
         scene_len_sec = scene_list + [frames_read]
@@ -370,11 +371,11 @@ def main():
             if args.list_scenes:
                 print('[PySceneDetect] List of detected scenes:')
                 print ('-------------------------------------------')
-                print ('  Scene #  |   Frame #   |    Timecode ')
+                print ('  Scene #  |   Frame #   |  Score #    |  Timecode ')
                 print ('-------------------------------------------')
-                for scene_idx, frame_num in enumerate(scene_list):
-                    print ('    %3d    |  %9d  |  %s' % (
-                        scene_idx+1, frame_num, scene_list_tc[scene_idx]))
+                for scene_idx, frame_pair in enumerate(scene_list):
+                    print ('    %3d    |  %9d  |  %9d  | %s' % (
+                        scene_idx+1, frame_pair[0], frame_pair[1], scene_list_tc[scene_idx]))
                 print ('-------------------------------------------')
             print('[PySceneDetect] Comma-separated timecode output:')
 

scenedetect/detectors.py

@@ -27,6 +27,8 @@
 # OTHER DEALINGS IN THE SOFTWARE.
 #
 
+from __future__ import division
+
 # Third-Party Library Imports
 import cv2
 import numpy
@@ -295,7 +297,7 @@ def process_frame(self, frame_num, frame_img, frame_metrics, scene_list):
             if delta_hsv_avg >= self.threshold:
                 if self.last_scene_cut is None or (
                   (frame_num - self.last_scene_cut) >= self.min_scene_len):
-                    scene_list.append(frame_num)
+                    scene_list.append((frame_num, delta_hsv_avg))
                     self.last_scene_cut = frame_num
                     cut_detected = True