Can’t render in Vegas, ghosting / blended frames

[John Rofrano]

Frame blending usually happens when you change frame rates. What frame rate did you shoot in? What frame rate is the project? What frame rate are you rendering to? If these are not the same, there is your problem. You might try going into the event properties and disable resampling but you should get your frame rates correct if they are not.

~jr

http://www.johnrofrano.com
http://www.vasst.com

[Juliano Kessler]

hi.
I shot the video with the Canon HV30 in 60i mode. Isn’t that 29.970 fps?

The project and the rendering I’m doing are in 29.970 fps.

[John Rofrano]

> I shot the video with the Canon HV30 in 60i mode. Isn’t that 29.970 fps?

Yes. Are you use that what you are seeing isn’t just motion blur? Was the camera moving while this footage was shot? If so, it could just be motion blur.

You said earlier:

> If I try to preview it in preview full, best auto, or best full, I get the problem, and it varies.

This tells me that the blur is on the footage that was shot and is not being introduced by Vegas. You might try using a faster shutter speed next time you shoot fast moving objects. Using Best Full will show you what the footage looks like.

Try looking at the footage in a media player and stop on a frame and see if the same blur appears on the original camera footage.

~jr

http://www.johnrofrano.com
http://www.vasst.com

[Juliano Kessler]

John

But it’s not blur. It’s indeed ghosting. Objects are not blurred, they are doubled. They are often crisp, but still doubled.

Have you seen the pics? In the white wooden sticks in the back, it’s very visible. They are not dragged from one point to the other; Instead the sticks are in 2 places at the same time, and they are relatively crisp.

How come I don’t get the doubling effect in the preview window, in preview quality and auto size, but any other quality & size settings produce the ghosting?

If I render, I get the ghosting effect, no matter which settings. Progressive field order setting seems to minimize it though. I tried all combinations of all video rendering options that Vegas offers, as seen in pic #5.

If I preview the footage in best full quality I get and horrendous image that is absolutely not what I get if I play the MiniDV tape from the camcorder directly to the TV.

[Terry Esslinger]

Watching it on the tv you are watvhing an interlaced image on a device that is made for watching interlaced images, If you watch it on a computer you are watching an interlaced image on a device taht is made to see noninterlaced images. The two distinct images that you see are probably the two fields of the interlaced image taken 1/30 second apart.

[Juliano Kessler]

Terry, I’m not sure if I agree.

If I render the video I edited to an AVI file, then I play it from the computer in the computer monitor or from the computer hooked to the full HD TV, the image is awful.

If I play the original non-edited image from the camcorder directly in the TV, the image is good.

If I print the edited video back to the MiniDV tape and play the tape in the camcorder directly in the TV, the image is good too.

[John Rofrano]

> The two distinct images that you see are probably the two fields of the interlaced image taken 1/30 second apart.

Exactly what Terry said!

Juliano, Look at the white picket fence again. There are not two distinct images. There are the ODD fields from one image and the EVEN fields from the other. If you went into Photoshop and cut and pasted the fence posts together you would see that they fit together like a puzzle because one post is only the odd fields and the other is only the even. You can see this even better on the headlight which is why they are pure white where they overlap but are a comb where they don’t (that’s just one field) That’s also why it looks fine on a TV which is interlaced. This is not something Vegas is doing. It’s how your original footage was shot.

~jr

http://www.johnrofrano.com
http://www.vasst.com

[John Rofrano]

> If I render the video I edited to an AVI file, then I play it from the computer in the computer monitor or from the computer hooked to the full HD TV, the image is awful.

That’s because your computer is a non-interlaced device. Plugging a TV into it doesn’t make it interlaced.

What is your final objective? Are you delivering this on DVD to TV viewers or are you delivering this via the web?

If you are delivering it via DVD you have nothing to worry about. If you are delivering it via the web you may have to re-shoot it. You can try setting your deinterlace method to Interpolate and see if it helps. Then render progressive.

~jr

http://www.johnrofrano.com
http://www.vasst.com

[Juliano Kessler]

Well.

I think I’ve got it.

After reading your answers I’ve read Wikipedia and it all makes sense now.

There is a number of deinterlacing techniques, but Vegas only offers 3 options and they don’t seem to work very well. I tried all 3 options Vegas offers: None, blend fields, interpolate fields. I couldn’t see a difference between them.

Considering interlaced displays should become less and less supported from now on (as I understood from Wikipedia) perhaps that’s a good reason for me to consider shooting at 30p or 24p from now on?

[Stephen Mann]

You haven’t said yet why you want to wind up in de-interlaced video. I shoot in 60i and deliver on DVD all the time. No problem leaving everything interlaced.

Steve Mann
MannMade Digital Video
http://www.mmdv.com