Calibrated Software XD Decode v2 - Manual (Page 18)

Page | 19
This controls how chroma is interpolated when converting from YUV 422 ->
RGB 444. ‘Average Neighbors’ will produce
smoother colors when converting; ‘Duplicate Values’ was added to essentially ‘turn off’ the averaging for a few customer’s
custom workflows.
Important Note about QuickTime Gamma Settings
Please Note: Even with the above settings to adjust Gamma, it is imperative that a user test out the settings in their own
workflows due to the fact that QuickTime Player and 3
rd
party applications can still disregard the Gamma information from
a codec and still attempt to adjust Gamma on their own.
Performance Options
Enabled Auto-Prefetching
The Calibrated{Q} XD Decode codec will auto-prefetch B-frames, this helps performance in faster computers but actually
hurts performance in slower computers. The reasoning for this is that in faster computers there is enough CPU speed to
do extra work in decompressing frames that are far ahead; however slower computers will get overburdened with the
extra ‘work’ decompressing video and drop even more frames. If QuickTime Player does not play back at or near
RealTime then try disabling this option to boost performance.
MT YUV->RGB
This option can enable/disable multi-threading YUV to RGB conversions if an application is requesting frames in the RGB
colorspace.
MT-X YUV->RGB
DEFAULT – This option can enable/disable multi-threading YUV to RGB conversions with OPTIMIZED 8-bit color-
conversion routines if an application is requesting frames in the 8-bit RGB colorspace when the Quick Setup is set to
either “Full Range/Gamma OFF” or “SMPTE Range/Gamma OFF”.
Colorspace Watermark
This option watermarks the video in the top-left corner – it is IMPORTANT to disable this option when doing production
work or rendering as the watermark will be a part of the video – this option is just meant for quick checks for the user to
see what colorspace Calibrated{Q} XD Decode is handing to the calling application. The watermark is a black rectangle.
The top text will either be 8-bit YUV422 or 8-bit YUV420
– this indicates what the XDCAM video was decompressed as.
The bottom text will either say Deliver 8-bit YUV422, Deliver High Precision YUV, Deliver 8-bit RGB444, Deliver 8-bit
RGBA4444, Deliver 16-bit RGB444, or Deliver 16-bit RGBA4444
– this indicates what colorspace the video frame is
delivered at to the calling application.
FourCC Output Support(Advanced)
All QuickTime codecs must be able to decompress to 8-bit RGBA and 8-bit RGB as a base colorspace format. QuickTime
codecs can also declare that they can decompress to other types of colorspaces as well, which can be useful in certain
workflows and applications.
Important Note about FourrCC Output Support
Even though Calibrated{Q} XD Decode supports decoding to 8-bit YUV422, 16-bit RGB(A) 444(4) and other YUV
colorspaces (i.e. High-Precision YUV) - it is up to an application using Calibrated{Q} XD Decode to request those
colorspaces
– most applications though only request 8-bit RGB(A) 444(4) from QuickTime codecs.
The FourCC options enable you to set which colorspaces, beyond the base 8-bit RGBA/RGBA, that Calibrated{Q} XD
Decode codec will declare to applications that it supports.
There are three FourCC options: