This article covers the following frequently asked display questions:
 

• Do I need a license to work in Dolby Vision using Baselight?
• How to load a Dolby Vision license in Baselight?
• Which Dolby Vision functionality is available inside Baselight?
• Which Dolby Vision version should I use for my projects?
• Which color management should I use inside Baselight for a Dolby Vision project?
• How do I set up a project inside Baselight for Dolby Vision?
• How to set up the correct image aspect ratio in Baselight?
• How to calculate Dolby Vision metadata using Baselight?
• How to trim for various targets using Baselight?
• How to trim across dissolves using Baselight?
• How to export in Rec.2020 from a P3 finished project using Baselight?
• Which I/O devices have been tested and verified for HDMI Tunneling?
• Which color panels support access to the trim controls using Baselight?
• Where can I get further information on how to use Dolby Vision inside Baselight?

 

Do I need a license to work in Dolby Vision using Baselight?

Some content owners want to make adjustments to the metadata on a shot-by-shot basis using additional "artistic trim controls". Dolby Vision trim controls are available in many systems and requires a license from Dolby. 
You can get a license through the Dolby Professional Store.
 

How to load a Dolby Vision license in Baselight?

To install the license, rename the file to “dolbyvision.lic” and copy it into the / vol/.support/etc folder on the Baselight

• Linux: /usr/fl/etc/
• Mac: Library/ Application Support/FilmLight/etc/

Close and restart the application if it’s running, as it only checks for the license on startup.

 

Which Dolby Vision functionality is available inside Baselight?

Please refer to this Knowledge Article, that will list the available Dolby Vision functionality inside currently certified color grading and packaging tools.

 

Which Dolby Vision version should I use for my projects?

It is recommended to use Dolby Vision 4.0 for all projects. Dolby Vision 4.0 has more functionality and in general yields better results in comparison to Dolby Vision 2.9 and it is backward compatible. If your delivery requires CMv.2.9 metadata you can easily export it out of a Dolby Vision 4.0 project. For more information about the differences between Dolby Vision CMv.2.9 and CMv.4.0, please refer to this Knowledge Article .

To downgrade Dolby Vision CMv.4.0 metadata to CMv.2.9 metadata stored in XML version 2.0.5 use Metafier with the following command:

./metafier -o <output_cm29.xml> --save-version 2.0.5 <input_cm4.xml>

 

Which color management should I use inside Baselight for a Dolby Vision project?

For Dolby Vision projects you might want to select a color managed, scene-referred grading option. Some popular scene-referred grading options for HDR and Dolby Vision deliveries are:

 

Working Colour Space	Display Render Transform
Filmlight: T-Log / E-Gamut	TCAM v2
ACES: ACEScct / AP1	ACES RRT
ARRI ALF – 2: LogC / WideGamut	ARRI ALF – 2
RED IPP2: Log3G10 / RedWideGamutRGB	REDIPP2

 

 

How do I set up a project inside Baselight for Dolby Vision?

To set up a project in Baselight for Dolby Vision, please refer to this Quick Start Guide Dolby Vision: Baselight.


 

How to set up the correct image aspect ratio in Baselight?

Before setting up the masking, check if your project has a single picture aspect ratio, or if it contains multiple aspect ratios. There are different approaches to working with single or mixed aspect ratios in a Baselight Dolby Vision scene.
Please refer to the Quick Start Guide Dolby Vision: Baselight for detailed setup instructions.

 

How to calculate Dolby Vision metadata using Baselight?

To calculate Dolby Vision metadata, insert a Dolby Vision Analysis layer:

• Select > Select all stack bottoms
• Insert - Dolby Vision Analysis
• Dolby Vision Analysis Layer - Select Analyse option

For more in-depth info, please refer to this this Quick Start Guide Dolby Vision: Baselight.


 

How to trim for various targets using Baselight?

The use of Dolby Vision Trim control requires that all shots are analysed and that a valid Dolby Vision Trim licence is in place. As the trims interpolate, start by trimming the SDR version first. For HOME deliveries use the Rec.1886: 2.4 Gamma / Rec.709 / 100 nits (HOME) target and trims, for CINEMA deliveries use one of the 48-nit P3, Gamma 2.6 (CINEMA) target and trims depending on the desired white point.
Start trimming using the L3 Mid Offset control before adding additional primary and secondary trims. 

To trim for various targets, insert a Dolby Vision Trim layer

• Select the Viewing Color Space to trim for in the Cursor View
• Select - Select all stack bottoms
• Insert - Dolby Vision Trim

You can also check the mapping for other targets and use trims, if needed. In this example: Dolby ST2084 PQ /P3 / D65 / 600 nits.

• Go to the Cursors View and select New
• Change the Viewing Colour Space to: Dolby ST2084 PQ /P3 / D65 / 600 nits
• Set your mastering display to HDR (ST2084 PQ)
• Review the mapping at 600 nits (the current Rec 709 trims will be interpolated) 
  • Optional:
    • Insert a new Dolby Vision Trim layer
    • Create new trims for 600 nits, if required

 

How to trim across dissolves using Baselight?

On dissolves, after applying the trims for both incoming and outgoing shot you will need to click the “Set Animated Trim Across Dissolve” button in the trim strip of the dissolve to avoid a bump during the transition. Whenever you change the trim for either the incoming or outgoing side, you will need to click the “Set Animated Trim Across Dissolve” button again.

For more info on how to best handle image transitions - see this Knowledge article .

 

How to export in Rec.2020 from a P3 finished project using Baselight?

To export in Rec.2020

•  Go to Views - Render - Render Colour Space > Rec.2100: ST 2084 PQ / Rec.2020 / xxx nits

Export a corresponding Rec.2020 Dolby Vision XML

• Views - Shots - Actions Button - Export Dolby Vision Metadata - Colour Space of Rendered HDR Media - Rec.2100: ST 2084 PQ / Rec.2020 / * nits
• Select the Frame numbering as per your choice
• De- Select - Write v5 XML
  • Only use v5 XML to include L11 as well as Cinema trims metadata to your XML. If not explicitly requested and outlined in the delivery specifications of your customer, you should deselect this option to export a version 4 XML
• Select a name and destination for the XML and press ok

Which I/O devices have been tested and verified for HDMI Tunneling?

The following AJA devices support Dolby Vision HDMI tunnelling:

• Kona 4
• Kona 5
• Io 4K plus
• T-Tap Pro

  To activate Dolby Vision HDMI tunnelling:

• A scene must be configured to use Dolby Vision.
• The signal type in the setup must be set to Dolby Vision.
• A viewing colour space matching the configured Dolby Mastering Display must be used in the cursor.

  When all of these conditions are met, a Dolby Vision signal will be sent to the television otherwise an 8 bit RGB signal will be sent.

For more information on Dolby Vision HDMI tunnelling, please refer this article.

 

Which color panels support access to the trim controls using Baselight?

All Baselight grading panels offer colourists access to Dolby Vision Trims controls.



 

Where can I get further information on how to use Dolby Vision inside Baselight?

Tutorials on Baselight will follow later. On the Filmlight homepage you will find more information about the product and its functions.