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Official MPEG repository to discuss public issues on CMAF (ISO/IEC 23000-19)
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Static metadata in HDR10 #45

Open ZmGorynych opened 5 months ago

ZmGorynych commented 5 months ago

In the industry HDR10 implies PQ colorimetry, 10 bits, and presence of static metadata SEIs, namely SMPTE 2086, MaxFALL, and MaxCLL, the latter two often considered optional as they don't work well in live linear.

The only mention of static metadata in the CMAF spec is in footnote c of table B.1 where all of these are optional.

Should we consider a profile where SMPTE 2086 is mandated, along with the recommended MaxFALL / MaxCLL where possible?

podborski commented 5 months ago

In CMAF BoG at MPEG145 it was noted that if the file undergoes any conversions this information would be necessary.

ZmGorynych commented 5 months ago

Should a profile be created to address this?

On Wed, Jan 24, 2024, 15:49 Dimitri Podborski @.***> wrote:

In CMAF BoG at MPEG145 it was noted that if the file undergoes any conversions this information would be necessary.

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cconcolato commented 2 months ago

I would simply add a recommendation ("should") that the clli box should be present. This remains compatible with old players and old files remain compatible.

haudiobe commented 2 months ago

On top of what @cconcolato says, we may add defaults in case they information is not present.