Problem going from 25 to 29.97 fps

jdmh wrote on 5/28/2003, 8:40 PM
I've got a PAL video I want to render at NTSC frame rate. Have tried rendering to MPEG-2 DVD NTSC and Uncompressed AVI with 29.97 fps, and in both instances I get horizontal ghosting artifacts when there is vertical motion (see http://users.bigpond.net.au/DavidHayward/vegas2.htm for snapshots showing the problem).

I've also tried an eval of a utility called MotionPerfect (www.dynapel.com) and I get the same problem.

Is going from a PAL to an NTSC frame rate while maintaining reasonable quality something I should be able to do? If so, what magic do I need to invoke to do it? Can it be done with Vegas?

As an aside, I my ultimate purpose is to create a DVD that will work with most North American DVD players & TVs, and my understanding is that a PAL DVD will be significantly less likely to work compared to an NTSC DVD. Is this correct?

Thanks!

David

Comments

SonyEPM wrote on 5/29/2003, 8:22 AM
If you have DVD Architect, or another DVD authoring app that will accept 24p MPEG-2 source files, you might try rendering as 24p. 25>24 (really 23.976) is less of a stretch than 25>29.97, might look better.
jdmh wrote on 5/29/2003, 9:27 AM
Will 24p files be playable on most North American DVD players?

David
SonyEPM wrote on 5/29/2003, 10:38 AM
yes, most Hollywood movies are encoded as 24p.
Acts7 wrote on 5/29/2003, 11:16 AM
or you can try this
in options menu at general tab:

Allow pulldown removal when opening 24p DV
Select this check box if you want Vegas to remove pulldown when you open 24 fps progressive-scan DV video files.

When the check box is cleared, Vegas will read 24p video as 29.97 fps interlaced video (60i).
SonyDennis wrote on 6/3/2003, 4:42 PM
David:

Vegas can actually do a fairly good job at PAL <-> NTSC conversions.

I looked at your stills, and in particular, image 3. It looks like your source video is not getting deinterlaced. If images are not deinterlaced before they are scaled vertically (which happens during PAL / NTSC conversions) then the interlacing gets scaled, which looks awful (a venetian-blind moiré effect).

Check your deinterlace method (project properties). It should be set to Blend or Interpolate (and almost never "None").

Make sure your "Full resolution rendering quality" is "Good" or "Best" since deinterlacing doesn't happen for Draft or Preview.

Set your Video Preview to Good or Best to see deinterlacing during editing.

///d@
beatnik wrote on 6/3/2003, 4:59 PM

SonicDennis, I posted a while ago something similar. I live in Canada, I want to send
a video to Greece on VHS. What do I do?

Do I render to PAL DVD-A, burn to DVD and use my set top DVD/VHS combo to
copy from DVD to VHS? Would this work?

Thanks,

Alex
SonyDennis wrote on 6/4/2003, 1:44 PM
Alex:

DVD Architect and your DVD burner can do NTSC or PAL, so as long as you have a DVD player that can do PAL output and a PAL VHS deck, you could make a PAL VHS tape to send, yes.

///d@