which software has ability to blur a portion of video without re-encoding also?

i want a software for pc which has abilty to blur a portion of video
and also the software should not re-encode the video after producing the output file?

is there any software like this?:crybaby:

I dont know whether this software requires re-encoding or not, but you can definitely check out Wax software which is a high performance and flexible video compositing and special effects software. The idea for Wax is to be very general purpose and flexible in video compositing and effects, so that you can compose your dream video sequence with ease everytime. Download it from here.