How do you handle mixed interlacing?

[axymeus]

Hey, I don't really know how to phrase that question, sorry if the title souds weird... Many of my DVDs present a combination of progressive and interlaced frames in their content. Most of the movie will look progressive (no combing), and then one scene is interlaced; sometimes it's only the transitions between scenes that are. I really don't understand how it can even be, but hey... Running ffmpeg idet determines that the source is progressive (mostly). Here's an example in MacGyver, season 2 episode 20 :




I suppose this may be due to the fact that my DVDs are all PAL, but I don't know if I should deinterlace those videos. The vertical resolution would be divided in half if I do, all for the benefit of a few minutes in the whole season. So, how do you handle that, if you have ever encountered this case?

[Woodstock]

Handbrake, filter decomb=BOB.

[axymeus]

Correct me if I'm wrong, doesn't the bob filter works like yadif mode 1 (one frame for each field)? I think it does, and so effectively divides the vertical resolution by 2, but preserves smooth motion.

[Woodstock]

I think that's what the handbrake people said.

I've been finding that it works better for my DVD sources than "default".