How do I de-interlace a movie?

The de-interlace feature was removed from iMovie 10.

I'm not sure whether iMovie 10 de-interlaces by default, as I haven't used interlaced footage in iMovie 10. You could try it with an interlaced clip to see.

After capture, but before editing, you can use JES Deinterlacer or Handbrake to de-interlace the footage. Then import the de-interlaced footage into iMovie. Here's a screen shot of Handbrake's settings screen:

Info about JES Deinterlacer here: (I'm not personally familiar with the website.)

https://download.cnet.com/JES-Deinterlacer/3000-2194_4-21001.html

-- Rich

Hi, thesurreyfriends,

I have always assumed that iMovie 10 deinterlaced by default. But . . . not totally sure. I haven't been able to find any literature on it. If I had a 1080i clip with some motion in it to work with I could export it and see if there are any interlace artifacts in the moving parts.

-- Rich

Good that you got it solved.

I cannot replicate what you are experiencing.

Using a 1080i clip with iMovie 10.1.4 on El Capitan ( could run 10.1.6 but don't use it enough to worry ) I cannot get, from the project, an interlaced video out of share, either in H264 or ProRes.

The only way I can get interlaced out is if I share a clip from the Event, by clicking on that clip in the Event and File> Share .

However the latter is quite a useless exercise as you would not normally share an original media clip from the event.

Looks as though 10.1.15 behaves differently.

thesurreyfriends,

So, iMovie 10.1.4 exports an interlaced clip as deinterlaced, but it does not deinterlace upon import.

I'll have to dig up an interlaced clip somewhere and see what I get upon export.

-- Rich

Rich

Yes , that is correct.

The above that I described was for a clip that was captured from HDV tape into iMovie ver 9.

You may know that when HDV tape is captured in iMovie ver 9 it is converted to Apple Intermediate Codec, AIC for short.

I used an AIC clip, 1080i, from such a capture and imported it into iMovie 10.1.4. It remains as interlaced when imported into imovie 10.1.4 but becomes de-interlaced on share.

I took the same tape and captured the same section into iMovie 10.1.4 . iMovie 10 captures HDV in it's native format which is MPEG 2, basically a copy of what is on the tape. This 1080i clip, captures as 1080i but shares as de-interlaced.

So in either case, for me at least, the interlacing is preserved on import but not on share/export.

New version of iMovie available....10.1.16 and Catalina....10.15.7 so maybe a lot of recent problems will be solved ?????

Hmmm. So we have different findings. Perhaps thesurreyfriends findings are different than yours because using an earlier iMovie version than you. A reconciling conclusion might be that earlier versions exported interlaced as deinterlaced, but the later versions to not. Interesting.

-- Rich

I think that Rich is correct when he says that iMovie 10 de-interlaces by default.

Great! Glad that you got everything working.

-- Rich

Thanks for the info. So, interlaced in, de-interlaced out.

-- Rich

Curious.

What is the format of the video that you are importing?

Are you using QuickTime Player to view your exported video?