Available encoding formats for PDF. 
- Enumerator: 
 - 
| ePDFPr_Default  | 
=0: Default encoding mode (choose best internal representation for non-binary data). Input data is analyzed and text, numeric or binary compaction mode will be used accordingly (to produce the smallest symbol).  | 
| ePDFPr_Binary  | 
=1: Binary Encoding (faster if binary data is to be encoded). Encoding will be in binary mode without further data analysis.  |