Working with interlaced and progressive footage ques

[Jan Sherlink]

Keep your footage “as is”
Let AE do the deinterlacing. Just make sure you interpret your footage correctly. With interlaced footage, enable the “preserve edges” it’ll render a bit longer but the quality will be outstanding.
Motionwise, your progressive footage will be of lesser quality, so that will be the way to go.
Render your comps without fields so interlaced-sources will become progressive and progressive-sources will stay progressive(sharp).

If you render interlaced, your final product will be a mix of 1080i and 1080p within one frame, not all TV’s/LCD’s can display that correctly. These days most LCD have 1080p motion correcton to make images run more fluidly. With a mixed output you could have some weird artefacts.

so your setup would be:
Source1 Key: separate fields: upper/lower fields with PE selected
Source2 Assets: separate fields: off
Rendering: field render: off

cya,

Jan

[Adrian Scherger]

Jan,

Thank you so much. That helped out alot.

I am getting animation from an artist and it looks like I need to talk to him about what format he will be delivering so that his and mine match in frame rate and interlaced vs progressive.

I will have a few more questions within the week and you seem like you are very knowledge. Would it be alright to contact you via email with a few questions? I’m a couple years out of film school and landed in a sort of post coordinator position for the first time. I’ve been editing and compositing for a long time though.
Thanks, again
ascherger@mac.com

Adrian

[Chris Wright]

Today’s high-def broadcasts are done in either 1080i or 720p, and there’s little or no chance they’ll
jump to 1080p any time soon because of bandwidth issues and Blue Ray is interlaced format too.

What happens when you feed a 1080i signal to a 720p TV?
The 1080i signal is scaled, or downconverted, to 720p. Nearly all recent HDTVs are able to do this.

What happens when you feed a 1080i signal to a 1080p TV?
It’s converted to 1080p with no resolution conversion. Instead, the 1080i signal is “de-interlaced” for display in 1080p. Some HDTVs do a better job of this de-interlacing process than others, but usually the artifacts caused by improper de-interlacing are difficult for most viewers to spot.

AE’s deinterlacer is very poor quality compared to other methods, hardware based or third party tools.

[Adrian Scherger]

Chris,

Thanks for your advice! A couple more questions if you don’t mind.

So it turns out I will be combining my 1080i footage with Animation, probably a series of animation stills like Targas. The final product will probably be WEB-BASED. I will need the animation, as well as the live footage to be as high quality as possible. I believe my best option is to deinterlace the live footage.

First, What is the Best way to deinterlace 1080i footage. With FCP, AE, or another software? Would it be best to go to 720p?

Second, will this effect my keying later in a negative way?

Thanks!

Adrian

[Chris Wright]

Compare AE’s fields off with fieldskit, algolith, magic bullet frames, in a side by side comparison. Each has strenths and weakness depending on your footage and price range. I use algolith.

The animation might be 24 or 23.976 fps and your video might be 29 fps, so twixtor it out or work with different framerates.

Key the footage before you deinterlace and finish on web in Sorenson Squeeze.

Use Tiff 32 pixel no lzw or some 10 bit video codec so you can export without color loss using color management described here.
https://forums.creativecow.net/readpost/2/944346

[Adrian Scherger]

Thanks! I’ll check that stuff out. I’m sure I’ll have a few more questions along the way. If I respond to this thread in a week or so with some more ques, will you be notified?

Thanks again Chris

Adrian