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Interlaced Quicktime Field Removal ?

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Brian Palmer
Interlaced Quicktime Field Removal ?
on Feb 3, 2012 at 9:25:11 pm

We have a rendered quicktime 720x486 @ 29.97 Apple Pro Rez 422. It plays back with a noticeable field issue. Can anyone recommend a step by step process using Cinema tools, FCP 7 or After Effects to resolve this field issue?

We're trying to make this project available for clients to view as soon as possible but it's looking pretty bad with the wrong field order.

Many Thanks in Advance.



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Dave LaRonde
Re: Interlaced Quicktime Field Removal ?
on Feb 3, 2012 at 9:49:21 pm

If you're NOT using a proper video monitor, you should be. It almost always looks fine in a video monitor.

The exception: the field order is wrong... but you can't tell if it's wrong without a video monitor.

Dave LaRonde
Sr. Promotion Producer
KCRG-TV (ABC) Cedar Rapids, IA


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Brian Palmer
Re: Interlaced Quicktime Field Removal ?
on Feb 3, 2012 at 10:08:01 pm

Thanks, for the Reply. Correct. On a video monitor it will look fine. However, we need to remove the field order and have it play on a computer monitor for on-line viewing.

Any suggestions or steps on how to resolve the field separation issues for on-line viewing would be appreciated

Thanks.



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Michael Gissing
Re: Interlaced Quicktime Field Removal ?
on Feb 3, 2012 at 10:13:22 pm

Make a copy through Compressor and change turn frame controls on. Select progressive. This will do a good deinterlace, better than the built in FCP deinterlace filter.


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Brian Palmer
Re: Interlaced Quicktime Field Removal ?
on Feb 3, 2012 at 11:07:41 pm

Is there a step by step solution that anyone can recommend through Cinema Tools?

We're thinking we need to do a 3:2 pulldown but the frame rate seems to increase? Any ideas would be much appreciated.



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Dave LaRonde
Re: Interlaced Quicktime Field Removal ?
on Feb 3, 2012 at 11:11:08 pm

There's no need to mess with pulldown: it's 29.97 video. Avoid using Cinema Tools. Use Compressor as earlier advised.

Dave LaRonde
Sr. Promotion Producer
KCRG-TV (ABC) Cedar Rapids, IA


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Brian Palmer
Re: Interlaced Quicktime Field Removal ?
on Feb 3, 2012 at 11:42:00 pm

The compressor solution is resulting in a mushy jaged image. Any way to make this look as crisp and clean on a computer monitor as it does on CRT?



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Michael Gissing
Re: Interlaced Quicktime Field Removal ?
on Feb 3, 2012 at 11:48:15 pm

Are you changing the codec? If you are re-compressing with a highly compressed codec then that could be the issue.


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Brian Palmer
Re: Interlaced Quicktime Field Removal ?
on Feb 3, 2012 at 11:58:49 pm

Yes, We would like to change the codec. Any solutions would be appreciated. Thanks.



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Michael Gissing
Re: Interlaced Quicktime Field Removal ?
on Feb 4, 2012 at 12:08:44 am

First up select the same codec as the original. That will be a quick way to test and make sure the field order problem is fixed.

Without knowing what you will be using to show the client I can only guess at an appropriate codec and data rate. Generally H264 can be played off most computers with most media players. If you want it to display as 16:9 then you need to select a square pixel aspect. 864 x 480 is going to display as 16:9.

Don't change the frame rate! Data rates around 8000 (basically the Vimeo spec) should look good and be easy to play. Higher data rates will look a bit better but may not play as smoothly depending on the computer hardware and drive


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