How to fix blended fields

[Acaila]

I don't have a lot of experience encoding Anime, so I've run into a problem. The movie is Ghost in the Shell (R2), PAL 25fps.

There are a lot of blended frames in this movie and its also fully interlaced. I ran a FieldDeinterlace() on it, but now I still have the blended fields to worry about. So I also ran a SeparateFields() on the original source to see what the pattern for decimating should be, and it's got me puzzeled, because I can't find a fixed pattern. Sometimes the second field is blended, sometimes the third, sometimes the fourth, etc.
Like I said, I don't have much experience with this sort of thing (I usually only have progressive PAL sources, lucky me :) ), so if anyone can suggest what filters/scripts to use I'd appreciate it, I just don't know how to proceed.

[droolian01]

Hi there.
I don't have any experience with dvd, but i encounter this blended field thing quite alot from my captures (uk pal). If the fields are blended there is no way you are going to reconstruct a progressive frame from that source. It seems to occur on pal stuff that was originally ntsc and 'lazyly' telecined, instead the ntsc should have been ivtc to 24 fps then it is usually speeded up to 25 fps pal.
The effect must be similar to what you would get filming a 29fps ntsc projection with a 25fps pal camcorder, and i think that is essentially how this rubbish telecine is done.

All you can do is fielddeinterlace, but fiddle with the parameters a little to see which works best. I know that this is not what you want to hear, this thing really irritates me too as i always strive for frame perfect encodes and always use telecide() if i can. But console yourself with the fact that you will not be able to see these artifacts when the vid is running, especially if you choose (blend=true) as one of the fielddeinterlace parameters.
Good luck

[DJ Bobo]

As droolian said, no way to get clean 24fps output. I hate this type of NTSC-PAL conversion, it's so irritating! I mean, who are those donkeys that invented this type of conversion??!! As Acaila said, I was really happy to live in a PAL country, where all DVDs are progressive, till I met for the first time this type of interlaced Anime, it's so unfair! (still there is the possibilty to import NTSC titles thanks god ;))

The most adequate way is the normal FieldDeinterlace(), which will produce progressive 25fps with lot of blends :(

[Acaila]

Both of you thanks for the help, I guess I'll have to live with the blends after all.