Update app.py

app.py

@@ -1505,34 +1505,33 @@ async def add_captions_from_srt(request: SrtCaptionRequest):
             f.write(fc_config)
         os.environ['FONTCONFIG_FILE'] = fc_file
         
-        # Map position to drawtext position
+        # Get margin value from request
+        margin = request.caption_style.margin
+        print(f"📏 Using margin: {margin} pixels")
+        
+        # Map position to drawtext position with margin
         drawtext_pos = {
-            "bottom-left": "x=20:y=h-th-20",
-            "bottom-center": "x=(w-tw)/2:y=h-th-20", 
-            "bottom-right": "x=w-tw-20:y=h-th-20",
+            "bottom-left": f"x={margin}:y=h-th-{margin}",
+            "bottom-center": f"x=(w-tw)/2:y=h-th-{margin}", 
+            "bottom-right": f"x=w-tw-{margin}:y=h-th-{margin}",
             "center": "x=(w-tw)/2:y=(h-th)/2",
-            "left": "x=20:y=(h-th)/2",
-            "right": "x=w-tw-20:y=(h-th)/2",
-            "top-left": "x=20:y=20",
-            "top-center": "x=(w-tw)/2:y=20",
-            "top-right": "x=w-tw-20:y=20"
+            "left": f"x={margin}:y=(h-th)/2",
+            "right": f"x=w-tw-{margin}:y=(h-th)/2",
+            "top-left": f"x={margin}:y={margin}",
+            "top-center": f"x=(w-tw)/2:y={margin}",
+            "top-right": f"x=w-tw-{margin}:y={margin}"
         }
-        position = drawtext_pos.get(request.caption_style.position, "x=(w-tw)/2:y=h-th-20")
+        position = drawtext_pos.get(request.caption_style.position, f"x=(w-tw)/2:y=h-th-{margin}")
+        print(f"📍 Position string: {position}")
         
-        # Build complex filtergraph for multiple captions
-        filter_parts = []
+        # Process each caption with its own drawtext filter
         current_input = video_path
-        current_output = os.path.join(work_dir, "temp_output.mp4")
         
-        # Process each caption with its own drawtext filter
         for i, caption in enumerate(captions):
             # Create a temporary file for this step
             temp_output = os.path.join(work_dir, f"step_{i:03d}.mp4")
             
-            # Calculate duration
-            duration = caption.end_time - caption.start_time
-            
-            # Build drawtext filter for this caption
+            # Build drawtext filter for this caption with margin
             drawtext_filter = (
                 f"drawtext=text='{caption.text}':"
                 f"fontfile={font_path}:"
@@ -1554,7 +1553,7 @@ async def add_captions_from_srt(request: SrtCaptionRequest):
                 temp_output
             ]
             
-            print(f"🎬 Adding caption {i+1}/{len(captions)}: '{caption.text}'")
+            print(f"🎬 Adding caption {i+1}/{len(captions)}: '{caption.text}' at margin {margin}")
             result = subprocess.run(cmd, capture_output=True, text=True)
             
             if result.returncode != 0: