readme.ieee1394_decoder

来自「VC视频对象的跟踪提取原代码（vc视频监控源码）」· IEEE1394_DECODER 代码 · 共 31 行

IEEE1394Source.h :
------------------

The quality of the decoder is defined by libdv.
7 levels of quality are defined in dv_types.h.

Among those choices, only the followings are suitable for the IEEE1394Source :

DV_QUALITY_COLOR |  DV_QUALITY_AC_MASK 
DV_QUALITY_COLOR | DV_QUALITY_AC_1 
DV_QUALITY_BEST =  DV_QUALITY_COLOR | DV_QUALITY_AC_2 

It seems that these three choices have the same efficiency with our decoder
( see results of tests )


fonction decode_image() for 50 frames : 
--------------------------------------- 

(1) DV_QUALITY_BEST
(2) DV_QUALITY_COLOR | DV_QUALITY_AC_1
(3) DV_QUALITY_COLOR |  DV_QUALITY_AC_MASK 


 % of total running time | self seconds | total us/call | Quality
   of the program	 |              |               |  
------------------------------------------------------------------
         99,29 %         |    1,40 s    |   28.800,00   |   (1)
         99,99 %         |    1,50 s    |   30.000,00   |   (2)
	 99,34 %         |    1,50 s    |   30.200,00   |   (3)