Adding buffersize calculation for srcpad
Adding buffersize calculation for srcpad

1.- Including buffer size calculation in the sink_setcaps call
2.- OMX_Workaround: Hardcoding video colorformat to NV12

mrchapp/gst-openmax-devel,mrchapp/gst-openmax-devel,mrchapp/gst-openmax,mrchapp/gst-openmax-devel,mrchapp/gst-openmax,mrchapp/gst-openmax