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Video calculation
Calculation direction
            Video size calculation   
         Calculation of video time   
                  Calculation of rate   
 
          Calculation parameters
Bit Rate:    
Kbps Hard disk storage      
Video length:    
Day 160G Block    
Hour 250G Block    
Minute 320G Block    
Disk space:    
GB 400G Block    
MB 500G Block    
  750G Block    
Channel number:    
Road 1000G Block