'Strobing' on DVD, on movement??

[Tony Wade]

Hi all,
Twice I have burned a DVD from PE3. rendered avi.
Original source material was a DVD from a DVR recorder of tv show. (I have used material from this DVR before, no problem).
It plays perfectly on the source DVD. Plays perfectly in PE3.
The burned DVD, strobes or flickers, when there is much movement of camera or people. Fine on statics and slower shots.
I am stumped...
Any ideas?
Cheers
Tony

[Paul LS]

Hi Tony, select the clip on the timeline, right click and select Field Order and select Reverse Field Dominance.

[Steve Grisetti]

You could also have selected the DVD/Hard Drive settings for your project. This setting automatically reverses the field dominance of MPEG/VOB sources.

[Tony Wade]

Thanks guys...Will do...

[Tony Wade]

I still can't get all the jitter out. The settings are...Field options/reverse field dominance/flicker removal. Better but not gone...??
This is for an ntsc burn, after ntsc render. The Pal burn went fine.

[RJ Johnston]

It might look better if the source material wasn't interlaced. You shouldn't convert formats (PAL/NTSC) with interlaced material. Try using "Always Deinterlace" along with "Reverse Field Dominance." You shouldn't need "Flicker Removal" if "Always Deinterlace" is on.

See if that helps.

[Tony Wade]

Thanks RJ, I will try that. Should I re-render?

[RJ Johnston]

No need to re-render unless you want to preview on a hooked up secondary interlaced TV monitor.

[Tony Wade]

OK, I am now doing another burn. Thanks much. (I have more coasters than a Texas Tavern)

[Tony Wade]

Another coaster. It didn't make a difference...Maybe I should just start again from scratch?

[Bob]

Although it's possible that there is a field order problem, I don't think that's the issue.

Your source is PAL, correct? I think the problem may be with how Premiere Elements is converting from 25 fps to 29.97 fps. I suspect that it is doubling and deleting frames to approximate the framerate rather than using pulldown flags. That will introduce noticible judder. The more motion the more noticible it will be.

There are programs that can add the pulldown flags to a mpeg-2 file. You can export an mpeg-2 file at 25fps resized for ntsc and add the pull down flags. For example, see this: http://www.afterdawn.com/guides/archive/convert_pal_to_ntsc_page_5.cfm. But, you'll need to burn the DVD using something that won't re-encode the video.

[Steve Grisetti]

It does sound like we're all working at the same issue: Interlacing.

Tony, you say your original source was a DVD of a TV program and that the original source was a DVR. You also say you rendered it as an AVI before you created your DVD.

That's a lot of conversions -- and I'd guess that it was one of them to should have had the interlacing reversed and didn't. That's something that wouldn't show until you burned your DVD, even if it occurred in step 1!

It probably didn't occur when you saved your DVR to a DVD. So did you use your DVD files directly in Premiere Elements or did you use a program like MPEG Streamclip to convert it to a DV-AVI first?

That's a vital step because it will determine which project settings you should be using in Premiere Elements in order to correct the interlacing issue.

DVDs and MPEGs use and upper field first interlacing method, and so must be loaded into a Premiere Elements project using the DVD/Hard Drive presets. DV-AVIs user a lower field first interlacing method, and so must be loaded into a project using the regular DV preset.

Is this all making sense?

[Tony Wade]

I found that the avi I used to create an ntsc avi, had NOT had the 'always deinterlace' and 'reverse field dominance' checked.
I am now creating another ntsc avi. I will then burn from that and see what happens.

[I loaded the dvd made by the dvr, straight into PE3. I have not had a problem doing this before (without another program).]

If this doesn't work, I will go back to square one and reload the dvd into PE...??

[Steve Grisetti]

Okay, we might be getting confused at this point, Tony. If you are using the DVD/Hard Drive preset for your project, you should NOT also reverse the field dominance. Otherwise you're reversing the interlacing that the preset already reversed. Make sense?

It only needs to be reversed once -- most likely on the path from being a DVD to becoming an AVI. And that's something that will happen automatically when use the DVD/Hard Drive project preset.

Make sense?

[Tony Wade]

Oh dear...Well, the render is happening now, so I'll see what comes out the other end. If it has 'doubled' itself, I will render again without the reversing...