Quote:
Originally Posted by quietvoid
The specs do mention the 1080p enhancement layer always comes with a 2160p base layer.
It is also something I have been wondering, you could easily test it by using yusesope's tool and merging the metadata into a reencoded HEVC file.
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Yes, the enhancement layer doesn't need to be full rez as it's really spatial metadata. The enhancement layer is unwatchable by itself.
That said, almost all new DoVi content for several years uses a non-backwards compatible (NBC) base layer without an enhancement layer. This provides more efficient encoding and lower complexity decode/tone mapping. x265 can encode the NBC base layer just fine, although I'd use --preset slower at a minimum, and the DoVi-specific encoding tweaks.