Ripping Minority Report

[The Belgain]

I'm trying to make a rip of this movie at the moment and the quality is not very good. Admittedly the bitrate is quite low since I'm making a 1CD rip and the movie is 2:20 long.

So far Ive made 1 rip using DivX 5.02 Pro with B-frames and GMC, and the result was not that great. I tried using XviD (Koepi's 04102002 build) with iago's recommended settings (which worked very well for SW Episode 2) ie no alt-cc, 2-6 for I-frame quants, 2-16 for P-frames, but it didn't come out too good.

I then changed the payback to biased, and changed the curve compression to high scene 0 and low scene 20 (they were both zero before) becaue the bitrate seemed to go too low during low motion scenes.

The resulting file looked better than DivX 5.02 most of the time (much more detail on faces, sharp edges, backgounds etc), but sometimes would go very blocky (not very often, but enough to be very annoying).

Has anyone ripped this movie and if so, can they recommend good setting?

PS: please don't flame me for asking for settings, I have tried to do some test, but I'm going home form uni tomorrow and the vobs aren't on my computer, so i need to get it right now, cheers.

[cjv]

Sounds like it's not the codec, (they're not magic), you just have a very uncompressible movie.

All I can suggest is the ususal:
go for 2 cds
use vorbis and low audio bitrate
go for an XCD
add a smoother filter (temporalsoften, fluxsmooth, c3d, etc...)
try a smaller resolution
try bilinear resize

The only thing you can really change in the codec that will make a noticable difference in compressibility is to use h263 if you are using MPEG, (or hvs-good), or use bframes from the developer build.

cjv

[The Belgain]

Well, it does seem to be fairly incompressible (loads of flahy lighs, a lot of movement in the background, etc.). 2CDs is probably the way to go I guess. I am already using vorbis with a low bitrate (-q 2) and h263 quantisers in XviD.

You're right that a lower res would probably help. Is bilinear resize gonna give me a more compressible movie than soft bicubic (I'm using neutral bicubic at the moment)?

[cult]

yes more compressible but also blurrier

[Infophreak]

It might also have something to do with the "Kaminski effect" that is mentioned in the review of the movie at dvd.ign.com (http://dvd.ign.com/articles/379/379540p1.html). I can imagine that all that grain is cabable of killing compressibility.

[The Belgain]

Cheers, I'll try using a filter to get rid of some of the grain. That is probably why it wasn't looking all that good. Is convolution3d a good one to use for this kind of thing? Is it included in the standard AviSynth package or do I need to download it seperately?

I'll post results later.

[The Belgain]

Also, should I put the Convolution filter before or after resize? I'm putting it after, since it should be faster that way right?

Should I use the Movie_HQ or Movie_LQ preset for this (I'm experimenting with LQ at the moment, but that's more of a guess)?

[Infophreak]

I'd say that you should put the resize filter as the last one in the filter chain. Resize distorts the source a bit that will probably make it a bit harder to clean the video properly. Now, I don't encode too much (almost never), but that is what my common sense (assuming I have any...) tells me ^_^.

[Shayne]

2:20 ur pushn the extent of any mpeg4 if ur picky.

2 CD's x $0.50 = $1.00 (1.00#) no biggie here

[sam_b]

I would suggest that if you really want it on one CD:

Use C3D AFTER the resizer. It will cope with larger 'grains'. Won't look as good but it will compress far more easily. If you want to get hardcore try (1,5,5,5,5,3,0) or something.

Use soft bicubic resize (x,y,0.5,0.25) or similar. Removes EE really well and looks good compared to a hightly compressed sharp-resized encode. Use with H.263 or hvs-good/better

What res you using?

[smokeslikeapoet]

I just got the Minority Report DVD today and there is a serious amount of grain to the film (fast film speed). I don't expect it to be too compressible simply for that reason. I don't want to filter the video because the grain was intended by Spielberg's choice of film stock. I'm just reducing the resolution and hoping I get good results.

[The Belgain]

I've re-encoded it using Convolution3d with the Movie_LQ preset (put in after resize in the AviSynth script) using DivX 5.02 (I wanted to make sure any problems weren't causes by wrong settings in XviD since I'm new to XviD) and the results were MUCH better: i lowered the resolution from 544x to 512x (2.40:1 aspect ratio....unusual) and the movie looks good and didn't even hit target size (meaning it compressed very well)!

The picture does look softer and with a little less detail, but it's much less annoying than the huge amounts of mosquito noise I was getting otherwise at this bitrate.

[smokeslikeapoet]

Yeah I found 512xH resolution was optimial with XviD B-Frames, Qpel, and Lumimasking. I would have done a two cd rip, but since I own the DVD there wasn't really a point.