Rendering Problem

[Michael Acres]

If you are watching the rendered mpg file, that is the interlacing you are seeing, when you complete the dvd and play it that will not be seen.

[John Rofrano]

[Shoestring Videos] “If you are watching the rendered mpg file, that is the interlacing you are seeing, when you complete the dvd and play it that will not be seen.”

Yea, you can’t judge the look of interlaced video on a non-interlaced PC monitor. Watch the DVD on a TV and see if the problem goes away.

~jr

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

[Danny Hays]

Why do people use interlaced anymore? Do you still have a CRT TV in your house?

[John Rofrano]

[Danny Hays] “Why do people use interlaced anymore? Do you still have a CRT TV in your house?”

Interlacing has nothing to do with CRT’s. The HD specification maintained interlacing for backward compatibility so all early HD TV’s are interlaced, broadcasts are interlaced, and the Blu-ray specification requires interlaced. It’s a legacy thing that is still with us and probably will be for quite some time.

BTW, if you are sending progressive video to your TV, depending on how you send it, some piece of hardware in the chain may be re-interlacing it for compatibility without you knowing it. 😉

~jr

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

[Danny Hays]

John, The reason I mentioned CRTs is because the phosphorus on the inside doesn’t dim fast enough to see interlacing. I don’t know much about television, DVD or Blu-ray specs. I just hate visible interlaced video. I rarely watch DVD or Blu-ray. I pretty much use computers or video servers as my source. If I send interlaced video to my led or lcd tvs, I definitely see it.

[John Rofrano]

[Danny Hays] “If I send interlaced video to my led or lcd tvs, I definitely see it.”

The reason is probably because you are not using a device that understands interlacing. If you watched DVD’s or Blu-ray you wouldn’t see this as the players process the video correctly.

~jr

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

[Gabriel Solomon]

Hi All, Once again Thank you so much for all your help and advice. I also posted this on another forum and the answer seemed to solve my problem.
1-the problem was still noticeable on the DVD that I made.
2- I also had the problem when rendering to upload to youtube.

For those that are curious, this is what I was told to do and I had success.

“At certain points (mainly during fast movements like dancing, the video appears to be wavy. Again, this problem doesnt occur when I am playing the timeline and viewing it on the monitor.”

You are changing the size of the interlaced video, so you must use “Best” rendering quality, not “Good.” This can be set in either the render or project panes. You must also choose a deinterlace method (Interpolate or Blend) in project properties. Just to prevent mistakes like this, I set “Best” rendering quality and Interpolate as my defaults in project properties.

The Vegas Support Forums are awesome. I am glad to be using Sony Vegas

Gabriel Solomon
LifeCapture Images
http://www.lifecaptureimages.com

[John Rofrano]

[Gabriel Solomon] “Just to prevent mistakes like this, I set “Best” rendering quality and Interpolate as my defaults in project properties.”

Thanks for getting back to us but that was NOT the proper solution. While that may have solved the immediate problem, you threw away half of your vertical resolution by deinterlacing using interpolate frames. There was no reason to deinterlace at all since your delivery was an interlaced DVD. If you want to pursue a better solution let us know, otherwise I’m glad you’re happy with your solution.

~jr

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

[Gabriel Solomon]

Hi John, Good Morning.
In this specific case, I had to upload to you tube and make a DVD. The solution that I used was good for rendering the file for the web.

Yes WOULD like to pursue a better solution. What do you suggest?

Is there any information posted by users that explain the vegas setting and properties. I usually use the default unless I specifically know if should change it. I would like to become more proficient in vegas and have more technical knowledge of the software.

Also, I do not understand what the technical terms mean. Is there a good resource for me to learn and understand the concepts behind interlacing and interpolating?

Gabriel Solomon
LifeCapture Images
http://www.lifecaptureimages.com

[John Rofrano]

[Gabriel Solomon] “Yes WOULD like to pursue a better solution. What do you suggest? “

I assume that you were shooting 1080i since that camera also shoots progressive but then you wouldn’t have interlace problems. Can you confirm that you were shooting 1080i? If so, you should be able to use one of the default HD project settings for 1920×1080-60i (interlaced) video (HD is Upper Field First) and keep your Deinterlace Method set to Blend Frames and have no problems will interlacing at full vertical resolution.

~jr

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