Bill_st
28th February 2003, 14:56
I am at a loss with this one, since I have very little exp. encoding animes in general (I'm doing it for my bro), and this one looks particularly odd to me. The DVD is the R2 PAL version of Trigun released in Spain, and it looks like it is both interlaced (little surprise there) and a varying degree of field blending in both the odd and even fields.
I want to encode it to VCD and I don't mind losing half of the fields in order to get rid of interlacing effects, but the problem I have is that each field follows a 24-25 frame cycle: it starts at the beginning of the cycle completely clear and each subsequent frame gradually blends with the previous one (ghosting effect) till 12 frames later you have a blurry 50/50 blended field of 2 different frames. Then in the next 12 frames it gradually does the inverse process until you get a solid field again with no ghosting (so the whole cycle last almost 1 sec). Each field follows the same cycle in the opposite direction, so when the odd field looks very blurry (50/50 blend) the even field looks perfect, and the other way around. They don't look bad in motion, but those blended fields make it hard to compress (even the DVD exhibits video artifacts in those blended fields), so I get artifacts everywhere after recompressing.
As I said before, I have little exp with animes and I live in a PAL country, so I now next to nothing about the avisynth filters used to deal with this stuff. I tried just in case telecide() but didn't do much good. I was thinking the only way to solve this problem partially would be discarding either the odd or even field for half of this blurring cycle, so the output could be 12-13 consecutive frames containing only the odd field and another 12-13 consecutive frames containing only the even field, hoping the cycle doesn't change in the middle of the video very often. If there is an automatic way to compare both fields and decide which one looks sharper on the fly that would be good too.
Anyone has an idea of what could be done or has encoded similar beasts?
I want to encode it to VCD and I don't mind losing half of the fields in order to get rid of interlacing effects, but the problem I have is that each field follows a 24-25 frame cycle: it starts at the beginning of the cycle completely clear and each subsequent frame gradually blends with the previous one (ghosting effect) till 12 frames later you have a blurry 50/50 blended field of 2 different frames. Then in the next 12 frames it gradually does the inverse process until you get a solid field again with no ghosting (so the whole cycle last almost 1 sec). Each field follows the same cycle in the opposite direction, so when the odd field looks very blurry (50/50 blend) the even field looks perfect, and the other way around. They don't look bad in motion, but those blended fields make it hard to compress (even the DVD exhibits video artifacts in those blended fields), so I get artifacts everywhere after recompressing.
As I said before, I have little exp with animes and I live in a PAL country, so I now next to nothing about the avisynth filters used to deal with this stuff. I tried just in case telecide() but didn't do much good. I was thinking the only way to solve this problem partially would be discarding either the odd or even field for half of this blurring cycle, so the output could be 12-13 consecutive frames containing only the odd field and another 12-13 consecutive frames containing only the even field, hoping the cycle doesn't change in the middle of the video very often. If there is an automatic way to compare both fields and decide which one looks sharper on the fly that would be good too.
Anyone has an idea of what could be done or has encoded similar beasts?