Preserving Dolby Vision metadata using ffmpeg? Or saving/restoring?

[Prairie Dog]

Quick question, if you are using ffmpeg to (for example) combine video from one file with audio from another, and the video track has Dolby Vision metadata, is there some way to preserve that? Or, is there a utility or method to extract the metadata from the video file to some sort of text file or .xml or other file, and then add that metadata back to a different file (assume mp4 files here)? Or is there something other than ffmpeg that can do similar operations on mp4 files and not lose the metadata?

[cyberspirit777]

you can use ffmpeg to do this with a command similar to this one: ffmpeg -i "input.mkv" -map 0 -vcodec copy -tag:v hvc1 -scodec mov_text -acodec copy -strict experimental "output.mkv"

You can also extract the DV metadata by using dovi_tools