Lately a few cams I have downloaded haven't worked to well for me. I can't find the right codec. I have tryed K Lite codec pack, Nimo 9 Beta 1, and Nimo Lite pack and everytime I try to watch cam's with this codec (Matrix2, X2) I have sound buy the picture is grey! No they are not fake files but I need the right codecs and don't know where to get them from . The codec is S-Mpeg 4 version 3 (mp43) does anyone know where I can get a working version?