New Feature: Add support for HDR master-display and max-cll to OAPV

[richardssam]

Could we add HDR support for openapv (in particular ffmpeg)?

There is already the oapv_md_mdcv and oapv_md_cll structures in the oapv_metadata.h file, but it seems like nothing is done with it.
If we could match the h265-params metadata, in a similar way to h265, so the ffmpeg args might be:

-oapv-params "colorprim=bt2020:transfer=smpte2084:colormatrix=bt2020nc:range=limited:master-display=G(13250,34500)B(7500,3000)R(34000,16000)WP(15635,16450)L(10000000,1):max-cll=1000,400"

and ensure that the metadata is correctly passed through ffmpeg, we should be in good shape.

Thanks...

Sam.

[kpchoi]

@richardssam I hope that PR #168 is helpful to support the features. I believe that ffmpeg code will be also changed to support this new APIs.

[dkozinski]

We are working on adding HDR support in ffmpeg

[richardssam]

Great news, thanks for the update. Sam.

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