Progressive render for DVD?

[Mike Kujbida]

Interlace flicker is usually caused by the images being far too large.
If your stills came from a digital camera and are something like 4000 x 3000 pixels in size, use Photoshop or a free app like IrfanView to reduce them a lot.
The rule of thumb is no more than 2X project size unless you’re doing deep zooms on them.
If they’re JPEGs, convert them to PNG as Vegas likes that format better.
Be sure to render using Best mode too as this will also help.

[Jaxon Bridge]

Thanks, but I do not believe this applies to my problem. My jpg images are only 1600×1200. They look fantastic when I render progressive (or render to WMV, which is perhaps natively progressive?). But the strobing/flicker/horizontal lines type of effect is very present when rendering NTSC DVD stream with interlace. So, regarding my original question, what happens if I burn a DVD for playback on TVs using an MPEG format that was rendered in the NTSC widescreen DVD stream, but with interlace set to None?

Jaxon

Vegas 7 Pro

[Mike Kujbida]

Are you watching the results on a computer monitor or a TV set as this will make a difference.
Computer monitors are progressive by design while (most) TVs are interlaced.
I’ve never done this so try it and see what happens.
Hopefully you’ll be pleasantly surprised.
BTW, are you using one of the default templates?
If yes, and your program is less than 70 min. long, use a custom CBR of 8,000,000 as this will make a quality difference (for the better, I should add).

[John Rofrano]

> So, regarding my original question, what happens if I burn a DVD for playback on TVs using an MPEG format that was rendered in the NTSC widescreen DVD stream, but with interlace set to None?

You won’t get what you expect because DVD Architect (or whatever DVD authoring tool you use) will have to re-render the stream as interlaced to conform to the DVD specification.

The only progressive format that is valid for DVD is 24p. I would change your project properties to 24p widescreen and render your DVD to 24p widescreen. I do all of my photo montages this way. They also render faster because you are creating less frames and you are not interlacing the material.

~jr

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

[Jaxon Bridge]

will a 24p DVD play back on “ordinary” DVD players and TVs ?

Jaxon

Vegas 7 Pro

[Charles Avanti]

yes

Charlie

[Jaxon Bridge]

In DVDA, it tells me that my video will be recompressed. I would think this is not necessary if it was rendered out of Vegas correctly? I rendered as NTSC widescreen 24p, a .mpg file. Is it normal for the project to then be recompressed in DVDA? It’s only 9 minutes long.

Jaxon

Vegas 7 Pro

[Jaxon Bridge]

ah, now i see it is because i turned on the reduce interlace flicker option in DVDA. since my project is all still photos, i thought this might help. perhaps it is not necessary since my Vegas render is 24p progressive?

the one thing i changed in the Vegas render was changing the CBR to 8,000,000 as another poster recommended. would this have caused DVDA to need a re-render also?

thanks for all the advice.

Jaxon

Vegas 7 Pro

[John Rofrano]

If you used the included MPEG2 template DVD Architect 24p NTSC Widescreen video stream and didn’t change anything then DVD Architect will not re-render. If you start changing things then all bets are off, depending on what you changed.

~jr

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

[Jaxon Bridge]

Thanks all for the help. My progressive DVD render looks great on the two TVs I’ve tried it on. One more question… from what I’ve read, some DVD players are interlaced, and some are progressive. Same with TVs. I’m not sure what kind of players I tried them on, but I’m wondering if I could expect the still images on my progressive DVD to have lots of interlace flicker if they get played back on an all-interlaced DVD and TV system ?

Jaxon

Vegas 7 Pro