Fix up segmented mode to loop their video segment

main.py

@@ -7,6 +7,8 @@ import argparse
 import shutil
 import time
 import threading
+import subprocess
+import json
 from concurrent.futures import ThreadPoolExecutor
 from pathlib import Path
 from typing import List
@@ -58,6 +60,7 @@ class MediaGrader:
         self.segment_caps = []
         self.segment_frames = []
         self.segment_positions = []
+        self.segment_end_positions = []  # Track where each segment should loop back to
         
         self.timeline_visible = True
         
@@ -527,6 +530,7 @@ class MediaGrader:
             self.segment_caps = [None] * self.segment_count  # Keep for compatibility
             self.segment_frames = [None] * self.segment_count
             self.segment_positions = []
+            self.segment_end_positions = []
             self.segment_current_frames = [0] * self.segment_count  # Track current frame for each segment
             
             # Calculate target positions
@@ -538,13 +542,23 @@ class MediaGrader:
             for i in range(self.segment_count):
                 if self.segment_count <= 1:
                     position_ratio = 0
+                    end_ratio = 1.0
                 else:
                     position_ratio = i / (self.segment_count - 1)
+                    end_ratio = (i + 1) / (self.segment_count - 1) if i < self.segment_count - 1 else 1.0
+                
                 start_frame = int(position_ratio * (safe_frame_count - 1))
+                end_frame = int(end_ratio * (safe_frame_count - 1))
+                
                 start_frame = max(0, min(start_frame, safe_frame_count - 1))
+                end_frame = max(start_frame + 1, min(end_frame, safe_frame_count - 1))  # Ensure at least 1 frame per segment
+                
                 self.segment_positions.append(start_frame)
+                self.segment_end_positions.append(end_frame)
                 self.segment_current_frames[i] = start_frame  # Start each segment at its position
+                
             print(f"Segment positions: {self.segment_positions}")
+            print(f"Segment end positions: {self.segment_end_positions}")
             
             # Preload the entire video into memory - simple and fast
             print("Preloading entire video into memory...")
@@ -600,25 +614,35 @@ class MediaGrader:
         self.segment_caps = []
         self.segment_frames = []
         self.segment_positions = []
+        self.segment_end_positions = []
         if hasattr(self, 'video_frame_cache'):
             self.video_frame_cache = []
         if hasattr(self, 'segment_current_frames'):
             self.segment_current_frames = []
 
     def update_segment_frames(self):
-        """Update frames for segments using the preloaded video array - smooth playback!"""
+        """Update frames for segments - each segment loops within its own range"""
         if not self.multi_segment_mode or not self.segment_frames or not hasattr(self, 'video_frame_cache'):
             return
         
         for i in range(len(self.segment_frames)):
             if self.segment_frames[i] is not None and self.video_frame_cache:
+                # Advance to next frame in this segment
                 self.segment_current_frames[i] += 1
                 
-                if self.segment_current_frames[i] >= len(self.video_frame_cache):
-                    self.segment_current_frames[i] = 0
+                # Get the segment boundaries
+                start_frame = self.segment_positions[i]
+                end_frame = self.segment_end_positions[i]
                 
-                # Direct reference - no copy needed for display
-                self.segment_frames[i] = self.video_frame_cache[self.segment_current_frames[i]]
+                # Loop within the segment bounds
+                if self.segment_current_frames[i] > end_frame:
+                    # Loop back to start of segment
+                    self.segment_current_frames[i] = start_frame
+                
+                # Ensure we don't go beyond the video cache
+                if self.segment_current_frames[i] < len(self.video_frame_cache):
+                    # Direct reference - no copy needed for display
+                    self.segment_frames[i] = self.video_frame_cache[self.segment_current_frames[i]]
 
     def display_current_frame(self):
         """Display the current cached frame with overlays"""