[HELP] Keeping HDR Metadata with vpxenc

[Selur]

You are not aware that VP9 doesn't signal HDR data on stream, but container level.
If you call "vpxenc --help" to see the options vpxenc offers you can see that there is no option for hdr signaling.

So what you have to do is:

• enable "Config->MKV tagging->Matroska advanced video signaling"
  
• hit the "Config->MKV tagging->Matroska advanced video signaling->Import HDR data from source"
  
• enabled the signaling you want to keep
  

Since this is container and not stream level signaling you can simply open your already encoded stream, set passthrough everything, adjust the signaling as mentioned and create a new job which should work fast, since it basically just extracting and muxing the streams.

Cu Selur