CS6 New Sequence Settings - MBD & MRQ Help

Question

Does it make a difference whether or not I set the MBD & MRQ in the New Sequence > Settings Tab or in the Export Dialog Box?
Do these same settings in the New Sequence > Settings also determine how Adobe handles video previews?
Currently I use AVCHD footage. Do I increase my color bit depth while working in my Timeline? If so, to what?
I was under the impression that whenever I import media into Premiere Pro it automatically up-samples media to 4:4:4 and 32 bit float color. Is this incorrect until I activate MBD & MRQ in the New Sequence > Settings Tab?
Any help would be greatly apprecated.
Thanks in advance

Answer 1

>I was under the impression that only RGB color space was expressed as 8bit, 10bit, 16bit and 32bit floating point.
There are pixel modes for 8,16 integer + 32bit float for both RGB and YUV.
>YUV is actually the only one expressed in chroma subsampling numbers as 4:4:4 etc. RGB has three distinct color channels expressed in bits per channel (Red, Green, Blue) while YUV has three different components which consist of lumanance and two chromanance. Big difference between both. In all actuallity it really should be expressed as Y'CbCr. YUV is actually an analog system.
correct. there is no reason to put "4444" after RGBA.
here are most of the pixel formats supported by Premiere...
PrPixelFormat_BGRA_4444_8u is the standard format Premiere always used.
PrPixelFormat_ARGB_4444_8u is what After Effects used
MaxBitDepth converts to, and uses,
For RGB:
     PrPixelFormat_BGRA_4444_32f
For YUV:
     PrPixelFormat_VUYA_4444_32f
     PrPixelFormat_VUYA_4444_32f_709
PrPixelFormats
** Currently supported types
*/// Packed formatsPrPixelFormat_BGRA_4444_8u // 4 byte BGRA, standard windows 32 bit pixels (was kPixelFormat_BGRA32)PrPixelFormat_VUYA_4444_8u // 4 byte VUYA (was kPixelFormat_VUYA32)PrPixelFormat_VUYA_4444_8u_709 // 4 byte VUYA (was kPixelFormat_VUYA32)PrPixelFormat_ARGB_4444_8u // 4 byte ARGB (the format used by AE) (was kPixelFormat_ARGB32)PrPixelFormat_BGRX_4444_8u // 4 byte BGRXPrPixelFormat_VUYX_4444_8u // 4 byte VUYX PrPixelFormat_VUYX_4444_8u_709 // 4 byte VUYX PrPixelFormat_XRGB_4444_8u // 4 byte XRGB  
PrPixelFormat_BGRP_4444_8u // 4 byte BGRPPrPixelFormat_VUYP_4444_8u // 4 byte VUYP PrPixelFormat_VUYP_4444_8u_709 // 4 byte VUYPPrPixelFormat_PRGB_4444_8u // 4 byte PRGB  
PrPixelFormat_BGRA_4444_16u // 16 bit integer per component BGRAPrPixelFormat_VUYA_4444_16u // 16 bit integer per component VUYAPrPixelFormat_ARGB_4444_16u // 16 bit integer per component ARGB PrPixelFormat_BGRX_4444_16u // 16 bit integer per component BGRXPrPixelFormat_XRGB_4444_16u // 16 bit integer per component XRGB PrPixelFormat_BGRP_4444_16u // 16 bit integer per component BGRPPrPixelFormat_PRGB_4444_16u // 16 bit integer per component PRGB  
PrPixelFormat_BGRA_4444_32f // 32 bit float per component BGRAPrPixelFormat_VUYA_4444_32f // 32 bit float per component VUYAPrPixelFormat_VUYA_4444_32f_709 // 32 bit float per component VUYAPrPixelFormat_ARGB_4444_32f // 32 bit float per component ARGB PrPixelFormat_BGRX_4444_32f // 32 bit float per component BGRXPrPixelFormat_VUYX_4444_32f // 32 bit float per component VUYXPrPixelFormat_VUYX_4444_32f_709 // 32 bit float per component VUYXPrPixelFormat_XRGB_4444_32f // 32 bit float per component XRGB PrPixelFormat_BGRP_4444_32f // 32 bit float per component BGRXPrPixelFormat_VUYP_4444_32f // 32 bit float per component VUYXPrPixelFormat_VUYP_4444_32f_709 // 32 bit float per component VUYXPrPixelFormat_PRGB_4444_32f // 32 bit float per component XRGB  
PrPixelFormat_YUYV_422_8u_601 // 8 bit 422 YUY2 601 colorspace
PrPixelFormat_YUYV_422_8u_709 // 8 bit 422 YUY2 709 colorspacePrPixelFormat_UYVY_422_8u_601 // 8 bit 422 UYVY 601 colorspacePrPixelFormat_UYVY_422_8u_709 // 8 bit 422 UYVY 709 colorspacePrPixelFormat_V210_422_10u_601 // packed uncompressed 10 bit 422 YUV aka V210 601 colorspacePrPixelFormat_V210_422_10u_709 // packed uncompressed 10 bit 422 YUV aka V210 709 colorspace