The MediaCodec support is SO BAD in Android. I spent months and months fighting it every step of the way to try and get real time streaming video working in a app. YUV 420 vs rbg pixel formats still gives me nightmares. I remember testing 3 different phones and each one returning a different pixel format, two were yuv base (422 or 410 i think but it's been a year and I try to block that out) and one rbg. Bleh! that project made me hate android for about 6 months after I was done with it.