Blackmagic Forum

Is it possible to deinterlace so that each field becomes a frame and doubles the frame rate?
For example an NTSC interlaced clip is dropped into a 59.94 progressive timeline - what I get is doubled frames. Is there a way to get each deinterlaced field to become a frame in a 59.94 timeline?

That's even the standard now, just set your timeline to exactly twice the rate. Are you on Studio?
If needed, it'll get re-interlaced on export when activated.

It doesn't do it for me. The NTSC clip is set to deinterlace and I drop it on a 59.94 progressive timeline - but every frame on the timeline is doubled up. What is the secret.

Can you upload a short clip? I'm living in PAL countries.

Thanks Uli,
here is a 4 frame NTSC interlace, lower field first, clip.
The question is how to convert it to 8 frames progressive.
Here is a link, I can't attach files to the chat:
https://app.box.com/s/v8menbeofkl8m6hmifgdifs10w64j34i


R17 beta 4
Windows

Works for me, but the frames look kind of strange, every other half is kind of squeezed, could be RS.
Anyway, definitely 8 different frames.

Could it be that it works on Mac but not on Windows version.
What do you see when you turn on deinterlace in clip properties? Does it change the frame rate to 59.94, or does it stay at 29.97?

George Deierling wrote:here is a 4 frame NTSC interlace, lower field first, clip

Field 2 of each frame of your source video looks strangely distorted.

I ran your file through this simple FFmpeg command:

ffmpeg -loglevel debug -i NTSC\ interlaced.mxf -filter:v "scale=0:0:interl=1,format=yuv422p,w3fdif" -an -f image2 -y NTSC\ interlaced.mxf.%2d.jpg

And it looks like this: https://www.dropbox.com/sh/ro8zx7eu6i9d ... K8FOYvnela

That's exactly what I see when I put your file into a 59.95 timeline in DR17.0b4.

the test file is distorted because it was scaled from 486 to 480 DV format...
It works for me too when I make a new project and drop the clip on a 59.94 timeline, there is no more deinterlace option, the clip gets automatically deinterlaced.

Doesn't work in a project that came from Resolve 16.

Thanks for helping figuring it out, it saved me a lot of time.

P.S. Copying and pasting bins and timelines from R16 project to new R17 project works fine.
But there is one bug: The field order of NTSC Avid MXF files is set to upper field, which is wrong, it should be lower field.

The latter is caused by the change from 486 to 480 since an odd number of lines is cut at the top and the bottom.
But that weird distortion on every other field might be a problem in the camera.

Hello Everyone,

I have the same problem as a previous poster. I have PAL DV footage and want to put it on a 50p timeline. I want the de-interlace process to create 50P from my 50i footage.

Unfortunately the DV footage is shown as 25p and I don't know how to convince Davinci to see it as 50i.

I sure I am doing it wrong, but I cannot figure it out.

I am on Davinci 17 Beta 6, Windows10, Studio Version, Neuro Engine on, all DV clips attributes set to de-interlace.

I would really appreciate any help.

Thanks and bye

Christian

Internally, DR will use all 50 frames, but they are hidden from you if your timeline is at 25. If you output with interlaced rendering enabled, you'll get interlaced footage with full temporal resolution. So, the process is kept transparent.

If you want 50 progressive frames instead, just set your timeline to 50 and you should see all temporal positions when frame-stepping.