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Should I deinterlace? [ANSWER]

Posted: Sun, 5th Jun 2005, 7:38pm

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Richard Summers

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Hello,

Should I Deinterlace my miniDV footage in Final Cut Pro HD before I import it into EffectsLab DV, if yes, when I import it into EffectsLab DV it shows me the project settings and I have to choose from Deinterlace Even, Deinterlace Odd, Interlaced Even, Interlaced Odd, or Progressive. - If my footage is already Deinterlaced in FCP HD, what should I choose from these project Settings.

Alternatively, if I should deinterlace it in EffectsLab DV and not beforehand In FCP HD, what Deinterlacing settings should I use in the EffectsLAb DV project settings when I import the footage.

Before you ask - All the videos that I create will only be displayed on a computer monitor, therefore I understand that the footage should really be Deinterlaced.

Also does it really matter wether I choose Deinterlace Odd or Deinterlace Even.

I will shortly be uploading a few Particle Textures as a way of saying thank you for all the help that I have received smile
Posted: Sun, 5th Jun 2005, 8:35pm

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Simon K Jones

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Deinterlacing reduces the quality quite drastically, and should only be done with the final movie when you are preparing it for viewing. Don't deinterlace while you are still working on the movie.

To work with interlaced footage in EffectsLab, choose Interlaced Even/Odd (depending on your footage). This will split each frame into two new frames, one for each interlace field. When you render, the fields will be recombined into a normal interlaced movie.
Posted: Sun, 5th Jun 2005, 10:46pm

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Richard Summers

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So if deinterlacing reduces the quality, should i really deinterlace at all, even when my movie is complete and ready to upload to my website ?

Also you say choose interlaced odd / even, depending on my footage - what exactly does it depend on ?

Thanks
Posted: Mon, 6th Jun 2005, 7:30am

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Redhawksrymmer

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Interlaced footage never looks very good on a computer, so as a final step I would de-interlace it. Keep an interlaced version so you can burn it on DVD or transfer it back to your camera in full quality. Interlaced footage looks great on a television.
Posted: Wed, 8th Jun 2005, 2:01am

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adamlightandmagic

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See, this is one of those things I've never gotten, you know? I deinterlaced my footage (unwittingly) and it looked fine on the computer, but jerky on the tv. Lesson learned!

But since then, I've made up videos that are interlaced and look as good on the tv as they do on the computer! So, I'm quite clueless as to why to deinterlace at all. If I can make interlaced footage that looks the same on a computer monitor as the tv screen, what's the need for deinterlacing?

Adam.
Posted: Wed, 8th Jun 2005, 2:41am

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Serpent

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Hmm, I did not know this. I knew deinterlacing looked supposedly bad on TVs, but I never messed with anything and it looked good on both. Weird. Thanks Tarn and Redhawk.
Posted: Wed, 8th Jun 2005, 8:37am

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Joshua Davies

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Rating: +1

Interlaced footage doesn't look good on a computer.

Most NLEs deinterlace your footage on-the-fly when playing back on a monitor so it will still look good but you can not bank on all video applications players doing this.

The problem is when you scale this footage to compress it for the net - this is where the interlacing will appear as odd line artifacts (many films in the FXhome cinema have this) and it looks terrible.

Below are the basic rules for releasing interlaced footage on DVD/Video/TV AND the internet.

1) Do all the editing of your movie and effects on original interlaced footage - the stuff which comes off your camera.

2) Use the interlaced version of your movie for your DVD/Video/TV presentations.

3) Make a second copy of your final movie and deinterlace it - then scale and compress this version for internet users.

This should mean that both your TV and internet viewers get the best quality you can offer. If you only want to make a movie for the internet then you can deinterlace your footage from the start.
Posted: Wed, 28th Dec 2005, 4:35pm

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Ceramite

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I know this is an old post but:

1. export a .mov from FCP- everything is fine
2. after exporting the same file from EffectsLab Pro there is interlacing artifacts. (horizontal line and jumpiness)
3. check both files in quicktime make sure its not a playback issue, problem only resides in the EffectsLab file.

Does it need to be imported different into EffectsLab?

edit- is this a result of not setting up an interlaced project?
Posted: Thu, 29th Dec 2005, 7:38am

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Hendo

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Rating: +1

Ceramite wrote:

is this a result of not setting up an interlaced project?
If your footage is interlaced, then yes, you should create your project as interlaced. Try that and see if it makes a difference to your render.
Posted: Thu, 29th Dec 2005, 7:19pm

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Ceramite

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Thanks Hendo!!!

Happen to know off the top of your head if DV is top or bottom interlaced?
Posted: Fri, 30th Dec 2005, 8:11am

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Hendo

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Rating: +1

Ceramite wrote:

Happen to know off the top of your head if DV is top or bottom interlaced?
Bottom (otherwise known as even or lower field).