position_from_running_time
Description:
[ Version ( since = "1.8" ) ]
public uint64 position_from_running_time (Format format, uint64 running_time)
  public uint64 position_from_running_time (Format format, uint64 running_time)
Convert running_time into a position in the segment so that 
      to_running_time with that position returns running_time
      .
Parameters:
| this | 
           a Segment structure.  | 
      
| format | 
           the format of the segment.  | 
      
| running_time | 
           the running_time in the segment  | 
      
Returns:
| 
           the position in the segment for   |