hyrbid interlaced/ntsc/film source help please

[spacedinvader]

Series is excel saga
region 1
shows up as hyrbid PROGRESSIVE/INTERLACED FILM/NTSC in DVD2AVI
using big 3 method


Im fairly new to dvd encoding, so if this question has been answered elseware Im sorry but I couldnt find anything. Im working on encoding a region 1 NTSC anime. Im just encoding the episodes, and cutting out all the extras. I know how IVTC works and etc, but basically my question is.... do I HAVE to re encode my dvd with an avisynth script that tells it to telecide and decimate? I have tried encoding this hyrbid, and when I use the avisynth scripts DIF4U generates (it tells it to telecide and decimate), the cropping comes out wrong near the bottom (I dont know how in the hell that happens if its not being cropped..), and the playback on certain parts is jerky. Cant I just encode the video exactly how it is, so that the output is exactly as it is on the original dvd? And if I were to do this.. how would I go about it? What I mean is, because DIF4U automatically makes avisynth scripts that tells it to telecide and decimate.. I would have to remove that.. but what settings would I use in DOCC4U?

Thanks for replies everyone

Edit.. also the first time i encoded this, the subtitles on the movie when watched flicker sometimes (only if there is say another subtitle being displayed for the name of a shop while there is a subtile on the bottom for someone talking) any ideas at to what is casuing that? an ifoupdate problem?

[Kedirekin]

Anime is hecka-hard to re-encode. Theoretically you could shut off automatic detection in DIF4U and force it to re-encode it as interlaced, but that can have it's own issues (inefficient use of bitrate, doesn't handle changing field precedence). One thing you cannot do (as far as I am aware) with re-encoding is preserve the hybrid nature of the source. You re-encode either as all NTSC or all FILM.

My advice (which I follow myself) is don't try to re-encode anime. Either use a transcoder like DVDShrink or Instant Copy, or split the disk to two DVDR.

As for the subtitle flickering, I believe a minimum time separation is being introduced either in the subtitle demuxing or re-authoring stage. When two people are talking at once, or when there is an overlay for a foreign-language sign and someone talking, the original DVD uses overlays with no time-separation to make it seemless. When processing introduces minimum separations, you get that irritating subtitle flickering. I used to get this all the time on SVCDs.

I suppose it would be possible to fix the flickering, but you'd have to find all the affected overlays and change their start and end times to remove the time separation. Once again, it's just so much easier to use a transcoder or to split the disk.

[spacedinvader]

hey thanks a lot for the reply

about transcoding.. hmm what exactly is it? And what do you reccomend to transcode dvdshrink or instantcopy? I assume theres guides on doom9 so ill use those.


thanks again

[Kedirekin]

hmm what exactly is it

FAQ about the Transcoding Technique (http://forum.doom9.org/showthread.php?&threadid=63587). In a nutshell, a transcoder requantizes an MPEG stream to make it smaller, but leaves everything else about the stream intact, so your hybrid stream stays hybrid and you don't need to worry about changing field orders and the other pitfalls of re-encoding. The downside of course is that if you try to compress the size too much, quality will suffer.

I only mentioned DVDShrink and Instant Copy as examples. There are quite a few transcoders available (check the sticky in the one-click forum for a list). DVDShrink is free so you can try it with no risk. Instant Copy has a fully functional trial available, so you can try it with no risk also.