The best possible eva AVS script?

Dannywilson · Post by **Dannywilson** » Thu Jul 17, 2003 5:51 pm

This is mostly directed to AD and Ermac, but what is the most useful script for working with the NON-renewal version of EVA and it's horrible interlacing problem? I am trying my hardest to play around with all the AdvancedAMV pack stuff and maybe create a "Magic Bullet" avs script, but I havent stumbled across one yet... Any help anyone could give would be appreciated.

the Black Monarch · Post by **the Black Monarch** » Thu Jul 17, 2003 11:02 pm

Throw out either Field 1 or 2 (but not both), resize to 720x480, and cut an arbitrary number of pixels off each edge.

Since the video was captured before interlacing, there are no duplicate frames and Decimate must be avoided.

Dannywilson · Post by **Dannywilson** » Fri Jul 18, 2003 3:42 am

the Black Monarch wrote:Throw out either Field 1 or 2 (but not both), resize to 720x480, and cut an arbitrary number of pixels off each edge.

Since the video was captured before interlacing, there are no duplicate frames and Decimate must be avoided.

Tried it.

That leaves ghosting and a horrible amount of visual artifacts...

AbsoluteDestiny · Post by **AbsoluteDestiny** » Fri Jul 18, 2003 3:51 am

You are not going to get rid of ghosting in eva cause eva has blended fields.

I'm sorry but I dont really know any way of helping. Most deinterlacing routines are about as good/bad as each other for eva and the image quality can only be marginally helped by the traditional cleaners.

Dannywilson · Post by **Dannywilson** » Fri Jul 18, 2003 4:00 am

AbsoluteDestiny wrote:You are not going to get rid of ghosting in eva cause eva has blended fields.

I'm sorry but I dont really know any way of helping. Most deinterlacing routines are about as good/bad as each other for eva and the image quality can only be marginally helped by the traditional cleaners.

I meant that with Monarch's suggestion, the ghosting got worse. sorry bout that... I may just do a frame by frame delete on it...

Quu · Post by **Quu** » Fri Jul 18, 2003 11:26 am

you could work in an interlaced format... such as DV?

would that help

Go DVD->DV with out messing with the field processing (you might have to swap field order in the DVD2AVI d2v file) ... but if it displays on the tv properly... its interlacing may be so fubared that you can only work with it... and not remove it

the Black Monarch · Post by **the Black Monarch** » Fri Jul 18, 2003 1:37 pm

Dannywilson wrote:I meant that with Monarch's suggestion, the ghosting got worse. sorry bout that... I may just do a frame by frame delete on it...

One ghosted field will become more pronounced, but the other will disappear entirely. Basically, you're reducing 4 fields per frame to 2 fields per frame, so the remaining two fields get stronger. I think it looks slightly better afterward.

trythil · Post by **trythil** » Fri Jul 18, 2003 2:49 pm

the Black Monarch wrote:
Dannywilson wrote:I meant that with Monarch's suggestion, the ghosting got worse. sorry bout that... I may just do a frame by frame delete on it...
One ghosted field will become more pronounced, but the other will disappear entirely. Basically, you're reducing 4 fields per frame to 2 fields per frame, so the remaining two fields get stronger. I think it looks slightly better afterward.

There's only two sets of fields in an interlaced frame.

the Black Monarch wrote: Throw out either Field 1 or 2 (but not both), resize to 720x480, and cut an arbitrary number of pixels off each edge.

This somewhat works but it looks absolutely terrible -- you're throwing away half the image data and interpolating (read: "faking") the rest.

--

Something that you may want to try is just to use an adaptive deinterlacer and work at 29.97fps -- if you tell it to blend fields it will ghost even more, but you at least won't get jagged lines (and one looks more visually pleasing than the other). Interpolating only what you need to may produce better results -- it really depends on the scene content.

A few smoothing filters will reduce the prominence of those visual artifacts, but it won't obliterate them entirely...

the Black Monarch · Post by **the Black Monarch** » Fri Jul 18, 2003 5:39 pm

trythil wrote: There's only two sets of fields in an interlaced frame.

Technically yes, but each of those fields is really two other fields blended together, so you have essentially four fields all going into one interlaced frame.

trythil wrote:This somewhat works but it looks absolutely terrible -- you're throwing away half the image data and interpolating (read: "faking") the rest.

I think it looks just fine and a hell of a lot better than blending...

trythil wrote:Something that you may want to try is just to use an adaptive deinterlacer and work at 29.97fps -- if you tell it to blend fields it will ghost even more, but you at least won't get jagged lines (and one looks more visually pleasing than the other). Interpolating only what you need to may produce better results -- it really depends on the scene content.

Yes, it does. If there's motion, then discard+resize looks better; otherwise, you might as well blend the fields, since there's no ghosting without movement anyway.

AbsoluteDestiny · Post by **AbsoluteDestiny** » Fri Jul 18, 2003 6:00 pm

the Black Monarch wrote:
trythil wrote: There's only two sets of fields in an interlaced frame.
Technically yes, but each of those fields is really two other fields blended together, so you have essentially four fields all going into one interlaced frame.

Thing is that's not really true. The nasty thing about the kind of blending you get on eva and various other anime is that the amount of the next image increases as you get to the bottom of the field.

Take this example from Ranma:

As you can see, the bottom of one of the fields is from the next frame as if the fields are blending into the next as they are sampled from top to bottom.

It's a problem with lots of anime that was telecined this way and it's practically impossible to deal with without gettting half a ghost on your image.