Mixing sources

handtruck · Post by **handtruck** » Mon Feb 28, 2005 9:43 pm

If I have a DV source (NTSC 29.97 interlaced) and a Film source from a DVD (or any NTSC 23.976 progressive source), how would you suggest I combine them in Premiere Pro?
Should I deinterlace the DV and convert it to 23.976fps, and what would be the best avs script to do that?
Or should I bump up the film source to 29.97fps, and what would be the best avs script to do that?

I searched the forum and did not find a similar post.

Thanks for any help you can give!

trythil · Post by **trythil** » Tue Mar 01, 2005 3:43 am

It depends on the relative importance and nature of both sources.

If you're using a lot more DV than film AND the film source can be readily sped up (i.e. it's animation, or you don't care about it looking weird), then converting everything to 29.97fps may be best. If you're using a lot more film than DV and you can stand to slow down the DV footage, then conversion to 23.976fps + deinterlacing may be most effective. And so on.

Oh yeah, don't forget about aspect ratio corrections, if any need to be done.

The summary: There is no fast answer -- you'll have to decide for yourself.

As far as deinterlacing DV goes, here's one way. It requires kerneldeint, which is part of the amvapp.

AVISource(path)
Kerneldeint(0)
AssumeFPS(23.976) # only for framerate conversion

Note that this is only applicable to bottom-field-first DV, which is true in most cases -- but some DV devices manage to screw it up. You'll have to figure out what the field order is for your footage. One way to do this is to write this in your AVISynth script

AssumeBFF().SeparateFields()

and check the motion. If it's jerky, it's top-field-first.

There are many other ways to deinterlace. One way is to use LeakKerneldeint(), an improved Kerneldeint(). You can also use, say, TomsMoComp, SmoothDeinterlace, ...

Needless to say:

http://www.animemusicvideos.org/guides/avtech/

handtruck · Post by **handtruck** » Tue Mar 01, 2005 6:12 am

Thanks, I was wondering what the best deinterlace method for DV was.. I'll give it a shot.

But can't I use ChangeFPS or ConvertFPS so I don't lose the timing? Is this something that is suggested? Which one is better? I don't think I could deal with such a slow down.

Org Profile · Post by **Vlad G Pohnert** » Tue Mar 01, 2005 2:48 pm

In terms of de-interlacing, the best is to try several of the methods and see what works the best... I find TomsMOComp is good, but sometime SmoothDeinterlace does a nice job for the particular video.

Vlad

trythil · Post by **trythil** » Tue Mar 01, 2005 4:47 pm

handtruck wrote:Thanks, I was wondering what the best deinterlace method for DV was.. I'll give it a shot.

But can't I use ChangeFPS or ConvertFPS so I don't lose the timing? Is this something that is suggested? Which one is better? I don't think I could deal with such a slow down.

ChangeFPS just duplicates and/or deletes frames -- you'll get jerky motion that way. ConvertFPS, in my experience, also doesn't do too well -- it tends to leave nasty artifacts. It also requires a conversion to YUY2 colorspace, which isn't too bad but isn't really necessary.

Manao's MVtools filter (http://jourdan.madism.org/~manao/mvtools.htm) seems to do a better job; you may want to try that first.