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questions about video interlace

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andy bluequestions about video interlace
by on Jul 23, 2014 at 9:28:50 am

my english is poor ,hope you can get it。
interlaced videos contains 2 fields,saying a 50i footage,when we preview it in premiere or after effects,the footage displays a full resolution,how does it work? one frame consists of two fields,but if the object ,saying a man move fast in the footage,the upper field and lower field in one frame are obviously different,however if you zoom closely,the footage displays smoothly,no crossed fields。
does the camera sover this when it generates video file,or these are sovered in post production software。

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Dave LaRondeRe: questions about video interlace
by on Jul 23, 2014 at 10:46:51 pm
Last Edited By Dave LaRonde on Jul 23, 2014 at 10:47:53 pm

Well, you're NOT viewing it at full resolution. The image you see in the comp window is actually half the vertical resolution because you're only seeing the first field of the frame.

Doesn't look all that bad, does it?

Now, if you want to see what BOTH fields look like, import the same piece of footage again. In the interpret footage settings, turn off the fields so AE thinks it's looking at a whole frame. Put it in a comp and go to a spot where there's a lot of fast motion.

You'll say to yourself, "Oh, so THAT'S what interlacing looks like!"

Then get rid of that clip in your project because it's so God-Awful ugly.

Dave LaRonde
Promotion Producer
KGAN (CBS) & KFXA (Fox) Cedar Rapids, IA

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