1749764 - macOS MediaCapabilities should report support for rec2020

Status: RESOLVED DUPLICATE of bug 1750897

(Core :: DOM: Device Interfaces, defect)

Description

[Brad Werth [:bradwerth]]

Once the macOS graphics pipeline has been updated to support HDR, we must change MediaCapabilities to report that we support bt2020. This is necessary to get sites like YouTube to offer HDR content to users.

Comment 1

[Brad Werth [:bradwerth]]

YouTube is probably doing a navigator.mediaCapabilities.decodingInfo check for a video format with a colorGamut of bt2020. We need that result object to return true for its supported property.

Comment 2

[Brad Werth [:bradwerth]]

Attachment: bt2020.html

Loading this page shows that we already report that we support bt2020. Since the intent of this bug is to ensure that video streaming sites like YouTube offer HDR content to Firefox, this bug should either have its title changed, or it should be closed.

Comment 3

[Brad Werth [:bradwerth]]

Attachment: rec2020.html

The MediaCapabilities spec uses "rec2020" as the proper colorGamut value for bt2020. This also is reported as supported in Firefox.

Comment 4

[Brad Werth [:bradwerth]]

Ahh, it looks like colorGamut values are ignored. The web-platform tests are expected: FAIL.

Comment 5

[Brad Werth [:bradwerth]]

Since the landing of Bug 1750897, MediaCapabilities trivially accepts anything that matches the spec, including a colorGamut of "rec2020".