Use
            the Burn-In Letterbox node to burn a letterbox into a clip.
         
         To burn in letterbox:
         
         
            - Drag a Burn-In Letterbox node to the
               Batch schematic.
            
- Attach the clip to the Burn-In Letterbox
               node.
            
- Select an aspect ratio: 
               
                  - 1.33:1 (NTSC/PAL)
                  
- 1.37:1 (Academy)
                  
- 1.66:1 (European 35 mm)
                  
- 1.77:1 (HDTV)
                  
- 1.85:1 (American)
                  
- 2.35:1 (Cinemascope)
                  
- Custom (With Custom selected, enter a
                     value for the aspect ratio in the Ratio field.)
                  
 
- If you want to offset the letterbox border,
               enter a value in the Offset field. 
            
- Click the Border Colour box to change
               the colour of the letterbox border.
            
- Attach an Output node to your clip and
                  then process the result.The burn-in letterbox
                  formatting is applied to the clip.