PIXEL_FRMT_422
cx_write(ch->pix_frmt, PIXEL_FRMT_422);
dev->channels[i].pixel_formats = PIXEL_FRMT_422;
dev->channels[i].pixel_formats = PIXEL_FRMT_422;
int pix_format = PIXEL_FRMT_422;
pix_format = PIXEL_FRMT_422;
chan->pixel_formats = PIXEL_FRMT_422;