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interlace playback vs. pause

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Houston Snyder
interlace playback vs. pause
on Jan 30, 2012 at 8:07:05 pm

Hello All,

My question is hopefully simple enough. I have been given footage that was captured on set from a live tv feed - its 29.97. I'm using a Kona card and I am outputting to a broadcast monitor all at 29.97 - upper dominance. When I pause on any frame in the video, I am seeing both fields at the same time and it looks awful. During play back its not noticeable but I wanted to make sure this is correct.


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Shane Ross
Re: interlace playback vs. pause
on Jan 30, 2012 at 8:16:11 pm

That is normal.

Shane
Little Frog Post
Read my blog, Little Frog in High Def


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Houston Snyder
Re: interlace playback vs. pause
on Jan 30, 2012 at 8:18:41 pm

Thanks Shane!

So is the Kona just combining the fields so I can see a full image? Also, to display on the web should I just send to compressor and de-interlace the final spot as the last step?

thanks!


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Dave LaRonde
Re: interlace playback vs. pause
on Jan 30, 2012 at 8:40:51 pm

Why do you feel the need to deinterlace? Does the nature of the project require the video to pause? Is it going to the web, where interlacing doesn't exist? If not, interlacing isn't essentially evil or anything.

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


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Shane Ross
Re: interlace playback vs. pause
on Jan 30, 2012 at 8:41:19 pm

[Houston Snyder] "So is the Kona just combining the fields so I can see a full image?"

Well, yes. Any video IO card does that. Your Tube TV does that. You should read up on what interlaced video is. Before HD came along, EVERYTHING you saw on TV was interlaced. Even TV shows shot on film, when telecined to tape, were then interlaced. Even and odd fields and how they are combined on a TV. When played, it looks quite normal.


[Houston Snyder] " Also, to display on the web should I just send to compressor and de-interlace the final spot as the last step?"

OH yes...The web doesn't do interlacing. It looks really bad.

Shane
Little Frog Post
Read my blog, Little Frog in High Def


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David Roth Weiss
Re: interlace playback vs. pause
on Jan 30, 2012 at 9:13:07 pm

[Houston Snyder] "Also, to display on the web should I just send to compressor and de-interlace the final spot as the last step?"

That depends upon the size of your final video output for the Web. If your final video size is 50% or less than the original, it will not require deinterlacing.

David Roth Weiss
Director/Editor/Colorist
David Weiss Productions, Inc.
Los Angeles
http://www.drwfilms.com

Don't miss my new Creative Cow Podcast: Bringing "The Whale" to the Big Screen:
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Creative COW contributing editor and a forum host of the Business & Marketing and Apple Final Cut Pro forums.


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Tom Matthies
Re: interlace playback vs. pause
on Jan 30, 2012 at 9:36:47 pm

And Upper field first is assuming HD material. It would be lower first for SD.

E=MC2+/-2db


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Michael Gissing
Re: interlace playback vs. pause
on Jan 30, 2012 at 11:39:18 pm

The Kona3 card allows you to choose to display single field in pause. I work with interlaced material for broadcast so I have that option selected so you don't have awful beat movement when you pause the timeline.


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adam taylor
Re: interlace playback vs. pause
on Jan 31, 2012 at 9:51:34 am

not quite so Tom - its only lower field first for sd DV. Every other sd codec is upper field first.

or so i was taught!

Adam Taylor
Video Editor/Audio Mixer/ Compositor/Motion GFX/Barista
Character Options Ltd
Oldham, UK

http://www.sculptedbliss.co.uk
My YouTube Animations Page


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Michael Gissing
Re: interlace playback vs. pause
on Jan 31, 2012 at 11:26:52 am

Oliver, Tom is correct as the frame rate is NTSC 29.97. PAL is all upper for SD & HD except DV & DVCPro50.


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