Dbox flag can be wrong on some CPL

[ghost]

On some DCP, DBOX flag is set to False :

=> "CPL dbox": false,
=> "CPL D-BOX": false,
=> "CPL MotionSimulator": "DBOX"
=> "NamingConvention.AudioType.MotionSimulator" = True

CPL_DBOX.xml.txt
(CPL xml -> xml.txt because "github rules")

[remia]

Forgot about this !

ClairMeta is currently relying on the DBOX CompositionMetadataAsset extension as specified in DBOX Technical Note 124-915-0005-A02.

To indicate that the Composition is enabled for D-BOX playback (independent of the specific Motion Code distribution mechanism), the ExtensionMetadataList element shall include a single ExtensionMetadata element with

• a scope attribute equal to "http://www.d-box.com/technical_notes/124-915-0005"
• a Name equal to "D-BOX Enabled"

Even if there is a CompositionMetadataAsset in this CPL, the extension is not here, not sure what we should do in that case...