Bug fix related to codec arg.
Bug fix related to codec arg.

braddockcg/ocropy,mapbased/ocropy,aws623/ocropy,danvk/ocropy,zuphilip/ocropy,loveheaven/ocropy,amitdo/ocropy,kba/ocropy,braddockcg/ocropy,catethos/ocropy,kba/ocropy,catethos/ocropy,lunactic/ocropy,aws623/ocropy,liuqingjie/Ocropy,dnacreative/ocropy,lunactic/ocropy,olivernina/ocropy,zuphilip/ocropy,tmbdev/ocropy,zuphilip/ocropy,stweil/ocropy,danvk/ocropy,kba/ocropy,loveheaven/ocropy,liuqingjie/Ocropy,dnacreative/ocropy,stweil/ocropy,stweil/ocropy,olivernina/ocropy,aws623/ocropy,amitdo/ocropy,braddockcg/ocropy,amitdo/ocropy,catethos/ocropy,tmbdev/ocropy,olivernina/ocropy,lunactic/ocropy,liuqingjie/Ocropy,mapbased/ocropy,danvk/ocropy,mapbased/ocropy,dnacreative/ocropy,tmbdev/ocropy,loveheaven/ocropy