Badly NTSC -> PAL converted DVD

[pogo stick]

I have badly NTSC -> PAL converted Simpsons DVD.
Some of the fields look like this:
http://pogo-stick.narod.ru/one_field.png
I used SeparateFields() to take this snapshot.
Is there a way get rid of fields like that?
Something like autodetection and replacement with previous?

[mf]

The forum is littered with questions like this and answers to it, with some working, some not working. I suggest investigating using the http://forum.doom9.org/images/top_search.gif.

[pogo stick]

Got it. Sorry about that.
For some reason I didn't realize that it's called "blended field" when I searched.

[Mug Funky]

hehe. unfortunately blending is the only practical way to convert NTSC->PAL reliably. there's things like motionperfect, but they have so so many problem samples that they can't be used all that effectively. field-blending is invisible in most cases on a TV, and is only apparent during interlaced pans, and similar motion. for anime it's very good, and only presents a problem for people like us who like to backup our stuff...

typically these artefacts are mitigated (i can't say "removed" because there are cases where this is impossible) by smart bobbing (turn fields to full frames, without loss of vertical detail), and "un-blending", where adjacent frames are compared, and if the frame in question is seen to be a blend (ie. can be made from previous and next frames), then it is replaced by the adjacent frame most similar to it.

i just WISH the goddamn producers could release a PAL version of their stuff. it's not like it'd cost them much more. they're just lazy :angry:

after all, (US) TV series are shot on film for this exact reason - export. film transfers well to NTSC and PAL, so no blending is needed.

[mf]

The thing is that there are no IVTC performing NTSC->PAL convertor boxes. All these animations (with exception of hybrid anime) ARE film, often even recorded on film, but with the PAL version being converted from the telecined NTSC version.

[scharfis_brain]

restore24 is able to do a nearly perfect backconversion of fieldblended PAL that has been made out of 24fps Telecined NTSC.

try this: http://forum.doom9.org/showthread.php?s=&threadid=75432

but I don't know much about simpson's framerate?

is it 15fps is it 12fps?
are there 24, 30 and 60 fps, too?

12, 15 and 24 fps should be handled very good using restore24.

but 30 and 60 fps will become a mess.

so, try It.

EDIT: didn't saw you've already posted in the restore24-thread...

[Mug Funky]

but with the PAL version being converted from the telecined NTSC version.

hmm. usually the r4 animes aren't done this way. at least i've never encountered one. it's all a matter of what masters the PAL people get... rubbish in = rubbish out. i know IVTC is done sometimes when there's no other choice (like a progressive PAL master), but of course hybrids will always be blended until we come up with some decent motion-interpolation stuff that works in realtime and doesn't b0rk hybrid stuff.

[scharfis_brain]

but of course hybrids will always be blended until we come up with some decent motion-interpolation stuff that works in realtime and doesn't b0rk hybrid stuff.

a hybrid not always makes a blend-conversion necessary.

there are converter-boxes, that do IVTC to slow-PAL (47.952 fps) and blend the other stuff (30p & 60i) to 47.952 fps, too.
Afterwards the whole thing is sped up to 50fps.

this gives a nearly perfect NTSC -> PAL conversion.

[sarahjh69]

Never ever convert NTSC to PAL (or vice versa)
there is no reason to do this AT ALL.

most dvd players and TVs happily play either format.
Buy the right equipment for the job. A Yamada 5520
dvd player from amazon costs £35 delivered and will
output any source dvd as NTSC or PAL at the switch of a switch.

[mf]

The problem is some TVs don't happily support this, and that means angry customers.

[Leak]

Originally posted by mf
The problem is some TVs don't happily support this, and that means angry customers.

Another problem probably is broadcast TV - I doubt they could easily broadcast NTSC or PAL60 on a PAL channel and vice versa, especially when viewers with old sets will be getting a b0rked picture or none at all...

np: Okino Shintaro - Skywriting (Last Exile OST 1)

[Mug Funky]

A Yamada 5520
dvd player from amazon costs £35 delivered and will
output any source dvd as NTSC or PAL at the switch of a switch.

oh...kay.

did you care to look at the crappy picture that resulted in this on-the-fly conversion? was it worse than if the source had been blended with a proffesional converter box?

the reality is that DVD houses release DVDs to be watched on TV, and not backed up. it's hard to make this argument to a production house: "please don't blend fields, as it makes my backups less compressible. sure, i can do them allright, but the files are too big for me to share online".

[edit]

blended conversions annoy me too, but i have to admit they look good on my screen.

i have a multiformat TV, and also the r1 and r4 versions of the same disc (as of my birthday, i got the r4 PAL box set of chobits. i already had the r1 NTSC version of 1 of the discs).

to be honest, after watching the same thing in both formats, i preferred the PAL converted one. you only see blends if you pause in a bad spot, and the pans for the most part _appear_ the same. there's the occasional exception to this, but not enough to hurt it. the tradeoff is more picture lines and an on-screen image where i couldn't actually see the space between lines (my TV is large and has a good pitch, meaning you could push a credit card between NTSC lines on it).

backing up is more difficult with blended sources, but backups aren't a priority for me - i just like the challenge of seeing if it can be done :), and for the most part it can with a good script and a lot of CPU cycles.