Add fix for second-to-last frame

src/audio_preprocessing.py

@@ -266,6 +266,8 @@ def get_red_green_segments(dist_matrix, path, wav_type='ref', threshold=0.4):
         num_wav_frames = len(dist_matrix[0])
     wav_distances = [0] * num_wav_frames
     for (i, j) in zip(*path):
+        if i == num_wav_frames - 2 and wav_distances[i] > 0: # Special case for second to last frame
+            continue
         wav_distances[i] = dist_matrix[i, j]
 
     red_segments = [i for i, d in enumerate(wav_distances) if d >= threshold]