Interlacing Issue in Playback

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Andrew K

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Interlacing Issue in Playback

PostTue Mar 12, 2019 2:36 am

Hi, I am editing a video but I am getting interlacing artifacts, how can I fix this?

The source video is 1080 30fps from my c100
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Peter Chamberlain

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Re: Interlacing Issue in Playback

PostTue Mar 12, 2019 6:46 am

Do you have the Studio version? If so, select to de-interlace in the clip attributes.

If not, select enable video field processing in the Project Settings, master settings.
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Andrew Kolakowski

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Re: Interlacing Issue in Playback

PostTue Mar 12, 2019 11:08 am

Did you shot it?
If so why interlaced?
What are you going to to with final master?
You either work with it as interlaced and export interlaced (if going to broadcast) or deinterlace on source and work in progressive project (if going to internet).
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Andrew K

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Re: Interlacing Issue in Playback

PostTue Mar 12, 2019 1:29 pm

I do not have the studio version, yet. And on the c100 I shot in 30 fps which in the C100 is labeled as PF30. So technically the c100 can only shoot progressive at 24fps. This was shot in the summer of 2017 and I was fairly new to the camera. I now only shoot 24fps 1080P.
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Andrew K

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Re: Interlacing Issue in Playback

PostTue Mar 12, 2019 1:30 pm

Peter Chamberlain wrote:Do you have the Studio version? If so, select to de-interlace in the clip attributes.

If not, select enable video field processing in the Project Settings, master settings.



Thank you, I will try that for sure!
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Andrew K

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Re: Interlacing Issue in Playback

PostTue Mar 12, 2019 5:13 pm

Enable Field Processing didn't work :/
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Jean Claude

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Re: Interlacing Issue in Playback

PostTue Mar 12, 2019 5:34 pm

Maybe: can you share a small clip that has an issue? just a test :)
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Re: Interlacing Issue in Playback

PostWed Mar 13, 2019 1:53 pm

This might not be exactly want you want since the Studio version is not used for this project, but consider:
In the OpenFX section of the Effects Lbrary in the editing window there are some filters that work in the free version. The two I recommend trying are the directional blur and deband. For the directional blur, set the blur angle between 45 and 90 degrees and set the blur strength as low as you can. An acceptable result may be possible depending on how the footage is used. The sacrifice is obviously sharpness. The sharpen filters are Studio only, but you can apply them to see how it looks, it will just have a watermark. I made an image with scanlines to test. The top image is a background with scanlines applied to simulate interlacing. The bottom image has the directional blur applied.

https://imgur.com/gallery/qbnKvdi?s=sms
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Andrew Kolakowski

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Re: Interlacing Issue in Playback

PostWed Mar 13, 2019 3:11 pm

Bad workaround. You are killing your footage.
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Andrew Kolakowski

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Re: Interlacing Issue in Playback

PostWed Mar 13, 2019 3:16 pm

Andrew K wrote:I do not have the studio version, yet. And on the c100 I shot in 30 fps which in the C100 is labeled as PF30. So technically the c100 can only shoot progressive at 24fps. This was shot in the summer of 2017 and I was fairly new to the camera. I now only shoot 24fps 1080P.


Best if you upload 10 sec original sample.
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Victor van Dijk

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Re: Interlacing Issue in Playback

PostFri Apr 26, 2019 7:08 pm

Perhaps not very helpful, but I'm having the exact same interlacing issues in Playback as Andrew K has.
I shot with my Canon 5D Mark III out onto a Atomos Ninja2 recorder in ProRes 1080P at 25fps.
It plays back horribly within Resolve 16 (free version)! All moving parts are having interlace issues, even after being rendered out, while the non-moving, static parts play back perfectly!

Any solution to this problem? I think it's odd that when you shoot Progressive, it's treated by Resolve 16 as some kind of interlaced footage...
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Re: Interlacing Issue in Playback

PostFri Apr 26, 2019 7:20 pm

DouglasRogers wrote:This might not be exactly want you want since the Studio version is not used for this project, but consider:
In the OpenFX section of the Effects Lbrary in the editing window there are some filters that work in the free version. The two I recommend trying are the directional blur and deband. For the directional blur, set the blur angle between 45 and 90 degrees and set the blur strength as low as you can. An acceptable result may be possible depending on how the footage is used. The sacrifice is obviously sharpness. The sharpen filters are Studio only, but you can apply them to see how it looks, it will just have a watermark. I made an image with scanlines to test. The top image is a background with scanlines applied to simulate interlacing. The bottom image has the directional blur applied.

https://imgur.com/gallery/qbnKvdi?s=sms

That is a case of very bad hacking, avoid!
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Andrew Kolakowski

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Re: Interlacing Issue in Playback

PostFri Apr 26, 2019 7:44 pm

Victor van Dijk wrote:Perhaps not very helpful, but I'm having the exact same interlacing issues in Playback as Andrew K has.
I shot with my Canon 5D Mark III out onto a Atomos Ninja2 recorder in ProRes 1080P at 25fps.
It plays back horribly within Resolve 16 (free version)! All moving parts are having interlace issues, even after being rendered out, while the non-moving, static parts play back perfectly!

Any solution to this problem? I think it's odd that when you shoot Progressive, it's treated by Resolve 16 as some kind of interlaced footage...


Your file is most likely interlaced. Post 10 seconds sample (with movement).
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Victor van Dijk

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Re: Interlacing Issue in Playback

PostFri Apr 26, 2019 9:17 pm

Andrew Kolakowski wrote:
Victor van Dijk wrote:Perhaps not very helpful, but I'm having the exact same interlacing issues in Playback as Andrew K has.
I shot with my Canon 5D Mark III out onto a Atomos Ninja2 recorder in ProRes 1080P at 25fps.
It plays back horribly within Resolve 16 (free version)! All moving parts are having interlace issues, even after being rendered out, while the non-moving, static parts play back perfectly!

Any solution to this problem? I think it's odd that when you shoot Progressive, it's treated by Resolve 16 as some kind of interlaced footage...


Your file is most likely interlaced. Post 10 seconds sample (with movement).


I ran several tests, and I was wrong to blame DVR16 for treating Progressive footage as 'some kind of interlaced'. Andrew, you were perfectly right, my recorded footage was as interlaced as could be, while I was convinced that I had all settings right i.e. progressive! DVR16 'tells the truth'!

Ok, for anyone out there with a Canon 5D Mark III AND an Atomos Ninja 2, here goes the solution,

Set your camera to 1920 25 ALL-I in the menu.

Set your Ninja 2 to 2:2 1080p25 by tapping the tiny blue arrow next to where it by default says, 1080[i50] (I'm on PAL in Europe), and selecting the right option/

Presto!

Thank you very much for your input!

Best,

Victor.
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Re: Interlacing Issue in Playback

PostMon May 13, 2019 3:23 pm

I have a big interlacing problem. We record at 1080i and i can't find the right settings for my project to run it smooth. here is what it looks like.

PLEASE HELP!!!!!!!
using DVR16 Beta
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Andy Kramer

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Re: Interlacing Issue in Playback

PostTue Jan 21, 2020 10:09 pm

I was looking for a solution, indeed, in the media pool, before you import the clips, right click on the clip and select de-interlace in the clip attributes. That really worked for me !!
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Andrew Kolakowski

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Re: Interlacing Issue in Playback

PostTue Jan 21, 2020 11:05 pm

Resolve GUI preview is going to show interlaced project like this- this is normal.
If you want to work with interlaced projects and have proper preview you ned BM card.
If your source is interlaced, but you want progressive end master then turn on deinterlacing at clip attributes level (Studio only feature if I'm correct).

Please don't call it "big interlacing issue" as there is no issue here (it's just the way how Resolve shows your video in GUI preview).
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Re: Interlacing Issue in Playback

PostTue Jan 21, 2020 11:18 pm

Yes and no.
In the color page it will show you interlaced footage. However, in the Edit page it will de-interlace the footage in the preview if you select this option in the Clip attributes and you play the video on full screen.
I just exported my project for the fashion week in Paris. I am happy with the export everything is perfect !
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Andrew Kolakowski

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Re: Interlacing Issue in Playback

PostTue Jan 21, 2020 11:35 pm

Why do you shoot interlaced? Camera limitation?
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Andy Kramer

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Re: Interlacing Issue in Playback

PostWed Jan 22, 2020 12:44 pm

No, for television we shoot interlace. For live, and for daily reports.
The station provide us with the technical sheet.
So far, most TV channels I worked with in Paris, accepts HD and 1440 in interlace. They don't accept from us anything else.
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Andrew Kolakowski

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Re: Interlacing Issue in Playback

PostWed Jan 22, 2020 8:56 pm

But you said you deinterlace in Resolve, which makes no sense.
You can shoot progressive and just export with interlaced flagging. About every higher-end production does it this way.
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Re: Interlacing Issue in Playback

PostWed Feb 12, 2020 1:35 pm

so what do we have to do if we have interlaced footage and we want to give in tv stations interlaced footage also ?
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Andrew Kolakowski

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Re: Interlacing Issue in Playback

PostWed Feb 12, 2020 2:27 pm

Turn on field processing for the project and export with codec which has interlaced mode (ProRes, DNxHD look for mode with 'i' in name, XDCAM-HD, GrassValley). Resolve is not the best tool for interlaced projects.
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Cary Knoop

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Re: Interlacing Issue in Playback

PostTue Feb 18, 2020 7:53 pm

Andy Kramer wrote:No, for television we shoot interlace. For live, and for daily reports.
The station provide us with the technical sheet.
So far, most TV channels I worked with in Paris, accepts HD and 1440 in interlace. They don't accept from us anything else.

I would use 50p/60p capable cameras, so you can use a decent progressive signal for on-line streaming and interlace in post for those out of date, never going to innovate, TV channels.
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Re: Interlacing Issue in Playback

PostSun Jan 03, 2021 1:28 pm

Andrew Kolakowski wrote:Why do you shoot interlaced? Camera limitation?


Interlaced format saves bandwidth...that's why! For a fixed bandwidth, interlace provides a video signal with twice the display refresh rate for a given line count (versus progressive scan video at a similar frame rate—for instance 1080i at 60 half-frames per second, vs. 1080p at 30 full frames per second).

Professional Broadcast Television is an Interlaced world.
Nothing to do with limitations on camera side. More Progressive is slowly making its way into the industry but for now that's the way it is.
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Andrew Kolakowski

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Re: Interlacing Issue in Playback

PostSun Jan 03, 2021 5:00 pm

Yes, but this was a problem 20 years ago. Today HD at 50/60p is not an issue. Sooner interlaced dies the better.
If you have camera capable of 50/60p then there is about 0 reason (except storage issues) to shoot interlaced (including case if you want to deliver 50/60i).
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Re: Interlacing Issue in Playback

PostMon Jan 04, 2021 9:05 am

Andrew Kolakowski wrote:Yes, but this was a problem 20 years ago. Today HD at 50/60p is not an issue. Sooner interlaced dies the better.
If you have camera capable of 50/60p then there is about 0 reason (except storage issues) to shoot interlaced (including case if you want to deliver 50/60i).


The limiting factor of anything is what the client requires. I agree its a different world for most of us compared to 20 years ago but for broadcasters tech updates are few and far between parties. its not just about splashing some cash which most wont do anyway. its a big big change to replace a whole supply chain if its not broken.

Case in point. ITN one of the worlds most famous news organisations update camera hardware about every 8 - 10 years. I cant recall the exact year but they didn't update to Even HD shooting until 2013/14 or 15 I think as the investment needed in the supply chain was too great and not cost effective. 4k had been released by this point and SD was still the format of choice.
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Andrew Kolakowski

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Re: Interlacing Issue in Playback

PostMon Jan 04, 2021 10:41 am

Broadcast is a relict in most cases (quite often the bigger one the more outdated). Still so many places with so outdated technology. No one wants to spend $ as except commercials they don't make much money.
This is still irrelevant for people who shoot by themselves. It doesn't matter if client requires interlaced- if possible always shoot progressive with required fps. Exporting interlaced from progressive sources is 10x easier than otherwise.

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