Blend or Interpolate fields?

VEGAS Pro

Blend or Interpolate fields?

Posted by Nigel O’neill on August 16, 2012 at 2:17 pm

My objective is to produce a PAL DVD. The online help suggests blend if the image is slow moving or relatively static and interpolate if there is fast motion.

I then rendered out a blended and interpolated event from the timeline of a speed skating edit, and compared them, but I can’t visually spot the difference. I then googled the topic and came across this:

Blend will indeed keep more vertical information, that is until the image starts to move. Then you are taking two fields, which were taken at different moments in time, and blending them together. This “smears” the video in relation to time and also produces ghosting of the image because of the temporal difference. Don’t use blending unless the image is static.

If I understand this correctly, I should use interpolate.

My system specs: Intel i7 970, 12GB RAM, ASUS P6T, Vegas Pro 11 (x32/x64), Windows 7 x64 Ultimate, Vegas Production Assistant 1.0, VASST Ultimate S Pro 4.1, Neat Video Pro 2.6

Steve Rhoden replied 13 years, 9 months ago 5 Members · 8 Replies
8 Replies

Steve Rhoden
August 16, 2012 at 3:10 pm

That is correct.

Steve Rhoden
(Cow Leader)
Film Editor & Compositor.
Filmex Creative Media.
1-876-832-4956
John Rofrano
August 17, 2012 at 1:02 am

I agree with Steve. Speed skating probably requires interpolate frames because of all the fast movement.

~jr

http://www.johnrofrano.com
http://www.vasst.com
Mikhail Petrushin
August 17, 2012 at 1:18 am

I’d avoid to use internal Vegas deinterlacing methods 🙂

While working with interlaced sources I’m deinterlacing them first with doubling frame rate and encode with lossless codec.
Yes, I know that this is more resources and time expensive and the workflow is much more complicated.
Steve Rhoden
August 17, 2012 at 3:24 am

And how does that comes out Mikhail ?

Steve Rhoden
(Cow Leader)
Film Editor & Compositor.
Filmex Creative Media.
1-876-832-4956
Aleksey Tarasov
August 17, 2012 at 4:18 am

> “While working with interlaced sources I’m deinterlacing them first with doubling frame rate and encode with lossless codec.”

I guess you take each field and convert it into a frame? In this case you loose half the vertical resolution.

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Aleksey Tarasov
August 17, 2012 at 4:27 am

There is a third option (imho, the best) – Yadif

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Mikhail Petrushin
August 17, 2012 at 5:57 am

Actually, it is interpolate 🙂

I used to use VDub with its internal deinterlace filter that allows to deinterlace videos using different interpolate methods (Yadif, ELA, Bob) with doubling frame rate. I used Yadif interpolation algorithm.

Now I use QTGMC deinterlacer as a part of SimpleSlugUpscale script when I working with SD footage.

P.S. Many thanks for the link to yadif plugin for Vegas
Steve Rhoden
August 17, 2012 at 2:05 pm

Seeing that tool for the first time!
Whatever i need to deinterlace properly i
usually use Revision Fieldskit in After Effects

Steve Rhoden
(Cow Leader)
Film Editor & Compositor.
Filmex Creative Media.
1-876-832-4956

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