Progressive video getting deinterlaced?

I’m seeing quality issues with some progressive videos - it looks like the video is processed as interlaced and there is loss of vertical resolution (similar to failed 2:2 pulldown detection). The Kodi osd (with “o” key) shows the video as progressive, but /sys/devices/platform/deinterlace/deinterlace/di0/frame_format reports interlace.

I’ve tested using the videos at https://kodi.wiki/view/Samples#Codecs.2C_Framerates_and_Subtitles and this can be reproduced with the “H.264 1080p/25.000” video (frame_format only, this particular clip doesn’t show issues from deinterlacing).

I think 29.97/30 fps progressive video has the same issue, but 24, 50 and 60 fps videos are ok.

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