i am converting my yuv420p file format to rgb888 so i took reference from http://en.wikipedia.org/wiki/YUV
but code give in section "Java source code used on Android" (at last section of wiki page)
their are 2 statements
u = u-128;
v = v-128;
I need mathematical reason for reducing 128 from u,v compent...
plz ,suggest some player for rendering video in Argb8888 format on ubuntu 12.04