Adds new encoder and decoder options (currently no-ops)
Encoder:
  InputBitDepth:     Bit-depth of input file
  OutputBitDepth:    Bit-depth of output file (default:InternalBitDepth)
  InternalBitDepth:  Bit-depth the codec operates at. (default:InputBitDepth)
  InputBitDepthC:    As per InputBitDepth but for chroma component. (default:InputBitDepth)
  OutputBitDepthC:   As per OutputBitDepth but for chroma component. (default:InternalBitDepthC)
  InternalBitDepthC: As per InternalBitDepth but for chroma component. (default:IntrenalBitDepth)

Decoder:
  OutputBitDepth:    bit depth of YUV output file luma component (default: use 0 for native depth)
  OutputBitDepthC:   bit depth of YUV output file chroma component (default: use 0 for native depth)

From: David Flynn <dflynn@rim.com>