Upload app.py

app.py

@@ -116,18 +116,27 @@ def background_process(job_id: str, req: ProcessRequest):
         processed_slices = []
         total_segments = len(segments)
         
-        BUFFER_START = 0.1
-        BUFFER_END = 0.5
+        # Reduced buffers to avoid repetition while maintaining clean cuts
+        BUFFER_START = 0.05
+        BUFFER_END = 0.2
         
         for i, segment in enumerate(segments):
             orig_start = segment.start
             orig_end = segment.end
-            start = max(0, orig_start - BUFFER_START)
-            end = orig_end + BUFFER_END
+            
+            # Lookahead to avoid overlapping with next segment
+            next_start = segments[i+1].start if i + 1 < total_segments else float('inf')
+            # Lookbehind to avoid overlapping with previous segment
+            prev_end = segments[i-1].end if i > 0 else 0
+            
+            # Apply padding but stay within boundaries of adjacent segments
+            start = max(prev_end, orig_start - BUFFER_START)
+            end = min(next_start, orig_end + BUFFER_END)
+            
             text = segment.text.strip()
             duration = end - start
             
-            if duration < 0.5: continue
+            if duration < 0.2: continue
             
             step_progress = 40 + int((i / total_segments) * 50)
             jobs[job_id].update({"progress": step_progress, "message": f"Slicing segment {i+1}/{total_segments}..."})
@@ -136,6 +145,7 @@ def background_process(job_id: str, req: ProcessRequest):
             output_path = temp_dir / output_filename
             
             try:
+                # Precise Slicing
                 subprocess.run([
                     "ffmpeg", "-ss", str(start), "-i", str(video_path), "-t", str(duration), "-y",
                     "-c:v", "libx264", "-preset", "ultrafast", "-crf", "28",