Output Option 2. Convert the Color Space and Brightness Function - AWS Elemental Live

This is version 2.18 of the AWS Elemental Live documentation. This is the latest version. For prior versions, see the Previous Versions section of AWS Elemental Live and AWS Elemental Statmux Documentation.

Output Option 2. Convert the Color Space and Brightness Function

You can convert the color space and brightness function used so that the effect in the new standard is the same as the effect in the old standard.

Supported Conversions

Color space and brightness data from the input can be converted in the output as follows:

To SDR 601 To SDR 709 To HLG 2020 To HDR10
Converting from SDR 601 Yes. See Case A below. Yes. See Case B below. Yes. See Case C below.
Converting from SDR 709 Not supported Yes. See Case B below. Yes. See Case C below.
Converting from HLG 2020 Not supported Not supported Yes. See Case C below.
Converting from HDR10 Not supported Not supported Yes. See Case D below.

Conversion is performed as follows:

Case A

  • Handling of color space: The video is tagged for the new color space, but there is no change to the pixel values.

  • Handling of brightness: No change (the source and target use the same brightness function).

  • Handling of metadata: Not applicable.

Case B

  • Handling of color space: The video is tagged for the new color space, but there is no change to the pixel values.

  • Handling of brightness: The position on the source function is mapped to the corresponding position on the target function; there is no scaling of values.

  • Handling of metadata: Not applicable.

Case C

  • Handling of color space: The video is tagged for the new color space, but there is no change to the pixel values (given that the source and target both use the same color space).

  • Handling of brightness: The position on the source function is mapped to the corresponding position on the target function; there is no scaling of values. In this way, the artistic intent is retained.

  • Handling of metadata: Metadata is added with default values.

Case D

  • Handling of color space: The video is tagged for the new color space, but there is no change to the pixel values (given that the source and target both use the same color space).

  • Handling of brightness: The position on the source function is mapped to the same position on the target function; there is no scaling of values. In this way, the artistic intent is retained.

  • Handling of metadata: Not applicable.

Setup

In applicable HEVC video encodes, set up as follows:

  • Codec: HEVC

  • Profile: If you are passing through HDR10 or HLG2020 or converting to HDR10 or HLG 2020, choose one of the profiles with “Main10” in the name. If you are passing through or converting SDR, choose any profile that is appropriate.

  • Insert Color Metadata: Checked.

  • Preprocessors > Color Corrector > Color Space Conversion: One of the color space choices. If you choose HDR10, then HDR Mastering Display Information fields appear.

  • Preprocessors > Color Corrector > HDR Mastering Display Information: This appears only if you choose to convert to HDR10. Leave the default values. Or, if you have previously converted similar content to HDR10 and you have been given better metadata to use with that content, then enter it here.

Note that the other fields in the Color Corrector preprocessor are not related specifically to HDR10.