problem with compressing .bik game video files

[-sbx-]

hi frinds

i have problem with compressing .bik game video files

i done with compressing .bik file to 50%

but in game no voice and no sound of compressed .bik video file

how fix it can any buddy help me

i ripped games
batman arkham asylum [to 4.3 GB but no sound in video files]
red Fraction Gorla {Ripped to 2.5 GB But No Sound In Video File}

plz plz help me to compress .bik files

{This New Tech. Of >Bik File }

[If U Have Batman A A game go to movie folder and compress intro video with bink Compress and replace this file to original file
and start the game when compressed video in starts only video in played no sound and voice ]