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interlace playback vs. pause
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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8 Replies
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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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[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 -
[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
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And Upper field first is assuming HD material. It would be lower first for SD.
E=MC2+/-2db
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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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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, UKhttp://www.sculptedbliss.co.uk
My YouTube Animations Page -
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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