The Transcoder currently strips all dynamic HDR metadata but as more and more TVs drop DTS/TrueHD support, transcoding will become ubiquitous (“Direct Streaming” brings more problems than it solves).
The first step was supporting HEVC encoding, the next would be injecting the metadata into the HEVC NAL units. The Transcoder should therefore either make an attempt to keep that data while transcoding, or extract the data beforehand (as part of the “Analyze” step) and inject it while encoding.
Today it’s already possible to inject HDR10+ via x265 --dhdr10-info=metadata.json and DV via x265 --dolby-vision-rpu=RPU.bin so it comes down to making it work with hardware transcoding (and the streaming technique of course).
