Dolby Vision incorrectly sized enhancement layer

[TheDreadPirate]

More research has found something interesting. Dolby Vision content can have a different Canvas Size vs Active Image Size.

It appears that jellyfin -ffmpeg may be using the Active Image Size rather than the canvas size to scale the DV metadata.

More info here: https://partnerhelp.netflixstudios.com/h...a-Overview

In my work flow my re-compression script automatically removes black bars.  But I noticed that with HDR content the bars are never removed and I figured it had something to do with the DV metadata including the black bars.  This confirms that.

This was before I started converting DV to HDR10, though.