More options for Live TV deinterlacing?

[macthaidhg]

Certain interlaced Live TV HDHomeRun streams (e.g. BBC One on Freeview HD) are not deinterlacing in Jellyfin. In Android TV clients such as Tivimate, deinterlacing happens OK as I can see the combing/tearing does not occur. Jellyfin is not apply deinterlacing even though it is enabled in playback settings.  How does Jellyfin handle deinterlacing? Does it only kick in if there is specific metadata in the input stream? I ran an ffprobe on the input stream and I can't find anything that suggests that the content is interlaced even though it is definitely interlaced! it has "field_order=progressive" which may wrongly give jellyfin the impression that it is progressive?