De-interlacing with Vegas

Here’s how to de-interlace with Vegas your own camcorder video. Do not de-interlace if your target format is recording back to the camcorder tape, but do so for all other target formats (e.g. PC viewing, devices, AppleTV etc). First of all, make sure that your “Project settings” look like this for HDV (use a DV template if your camcorder is a plain DV one, but keep the field order, rendering quality and de-interlace method the same):

Also, on your Preview Window make sure your setting is at either Preview(Auto) for HDV, or Good(Auto) for plain DV (otherwise you will see interlacing jaggies on the preview screen). Then, edit as you normally would. When exporting, if Vegas’ “save” dialog has the “Custom” button enabled, click it, navigate to the “Video” tab and select “None (progressive scan)” for the “Field Order”. Please note that not all format types have this option, but .avi and .mov do (and .mp4 on Vegas Pro). The .wmv option does that automatically, so in this case change the “Field Order” back to “Lower or Upper first” before rendering. Then, just render out.

I did several tests with de-interlacing methods and the one that works best for Vegas is the “Interpolate” method. I also tried a freeware open source plugin for Vegas (“Smart De-interlacer”) which was not that smart. Stay with Vegas’ own interpolation algorithm.


Ben wrote on September 14th, 2007 at 1:11 PM PST:

Eugenia, I’m a fan of yours and it doesn’t help that I miss Foster City and I’m stuck in San Jose now. Thanks for this tutorial (and every post of yours). Does this mean that 24p pulldown isn’t necessary, or does that involved process still need to be done when working with Vegas? How does this fit in with a 24p workflow?

If you’re ever in San Jose I absolutely insist on buying you a peet’s!

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Eugenia wrote on September 14th, 2007 at 1:53 PM PST:

Hi Ben, thanks for the kind comment and offer. 🙂

So, when you have already removed pulldown for your Canon HV20’s 24p footage using one of the available methods, you don’t need to de-interlace at all that footage when you bring in inside Vegas. You select “None” for field order, and “none” for de-interlace method too. You see, pulldown’ed 24p footage is already de-interlaced.

My above blog post is only valid for footage that is not de-interlaced, e.g. DV/HDV/AVCHD footage straight from the camera.

Ben wrote on September 14th, 2007 at 2:12 PM PST:

Duh. Got it, and thanks for the clarification. I’m new to this and I’m amazed at how complex this is, technically, and how imperative traditional ‘apprenticeship’ is when it comes to improving, know-how, and actual story-telling art.

Any sites/forums to recommend that discuss topics slightly wider then the actual camera hardware?

Your kind of feeding cat here with my questions – so my promise is made that this is my last question (until your next post!)

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Eugenia wrote on September 14th, 2007 at 2:24 PM PST:

The forums I am reading daily are: DVinfo | DVXuser | HV20 | VMS | Vegas

Michael wrote on September 15th, 2007 at 2:30 PM PST:

It seems that with “interpolate” you simply lose half of the resolution. It looks like that Vegas takes one field and doubles the lines. Not good, but probably is ok for internet distribution.

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Eugenia wrote on September 15th, 2007 at 2:34 PM PST:

Well, with “Blend fields” quality is just bad though on fast motion.

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