View Full Version : SPR - Streaks, Compare?
OvERaCiD23
23rd November 2002, 02:20
I encoded SPR (R1 NTSC) with good results, but in playback I noticed vertical streaks in certain parts. As seen in my attatched screenshot (around frames 36300+), there are streaks coming from the fire (and other parts). The screenshot is without any alterations (D2V to AviSynth to VDub to JPG, no resizing or anything), but it is apparent while watching the VOBs directly as well. I don't have the DVD at this time to compare (at my brother's apartment) if it was a ripping problem (not likely), but is this present on all SPRs?
cult
23rd November 2002, 18:34
I have encoded the same movie from pal(r2).Have the same stripes.I think it is in the movie made by purpose from the director
OvERaCiD23
23rd November 2002, 21:27
Okay, thanks. I didn't remember it while watching the movie, maybe I just wasn't paying attention (hasn't been recently). Just wanted to ensure it was in the source before I burn my rip to CD.
theReal
24th November 2002, 20:53
The DVD source seems to be pretty noisy as well (from what I see from the screenshot)
Acaila
25th November 2002, 13:07
I believe they did that on purpose to make it look more "authentical" to the time period it plays in. It's also one of the reasons why that movie is so hard to rip in good quality.
OvERaCiD23
26th November 2002, 07:31
yes, the noise is a real PITA. it's fairly difficult to rip this with a crisp picture, a soft resizer and lots of filtering is needed just to get the rip to ~60% on the comptests. i used TemporalSmoother(2,1).Convolution3d(preset="movieLQ).BicubicResize(xxx,xxx,0.333,0.333) for this rip. not as sharp as a picture as i usually strive for, but this is the noisiest movie i've ever encoded. i put it on 3 CDs w/ 2.0 AC3. if you want a challenge in ripping, try this one =)
serbersan
26th November 2002, 13:36
Why don't you try Tom's IDCT filter it could increase a lot compressibility without degrading visual quality too much.
Give it a try (It's in avisynth section and for YU12):
Great IDCT filter (http://forum.doom9.org/showthread.php?s=&threadid=38539)
cordraconis
2nd December 2002, 00:31
yes, it is a PITA to encode, but I did it at 3 CD, with 3.2 AC-3 right-from-the-DVD. (I tried 2 Cd's first, but there was still too much macroblocks, so I went for 3 cd's).
So, if you are using 3 Cd's, why go for 2 channels? try the original AC-3 track. [the surround sound is awesome!].
If you want to get the most out of your cd's, then cut the beginning (mine starts with the American flag that fades in) and the end (credits) like I did. I didn't use any filters ... (I experimented a little bit with a combination of temporal smoother and a dynamic noise filter, but eventually I decided that the "atmosphere" of the movie wouldn't be the same without the noise. Search the forum for more info about how I did it. (it should be somewhere ...)
About the noisyness of the film: I remember that I saw a making of on TV, a couple of years ago, and I do remember something about special diafragma-timing or something. I looked around on the net, and I found this:
"
To achieve a tone and quality that was not only true to the story, but reflected the period in which it is set, Spielberg once again collaborated with cinematographer Janusz Kaminski. "Early on, we both knew that we did not want this to look like a technicolor extravaganza about World War II, but more like color newsreel footage from the 1940s, which is very desaturated and low-tech," Spielberg says.
Kaminski had the protective coating stripped from the camera lenses, making them closer to those used in the '40s. "Without the protective coating, the light goes in and starts bouncing around, which makes it slightly more diffused and a bit softer without being out of focus," he explains. The cinematographer completed the overall effect by putting the negative through an additional process that extracted more of the color.
Another camera technique they applied was using 90-degree shutters, or even 45-degree shutters for many of the battle sequences, as opposed to today's standard of 180-degree shutters. Kaminski clarifies, "In this way, we attained a certain staccato in the actors' movements and a certain crispness in the explosions, which makes them slightly more realistic."
"
(so it was the shutter-timing I remembered:D ).
(this was taken from : http://www.sproe.com/s-spr.htm )
I hope this background info is a little bit usefull.
CdinT
14th December 2002, 03:17
The same filter is used in the recent "Minority Report". Again, a Spielberg movie. I personally like the looks of the effect but for riping purposes is pita. :)
cordraconis
14th December 2002, 09:21
I don't know the details of this filter, it could be the same, aldough from my chemists' point of view "bleaching" could be a variety of processes. :D
Thanx for pointing this out to me! I saw the movie, but I didn't notice that the colors were slightly off. (now that you mentioned it, I did, but it didn't occur to me that they might have used a filter/bleaching process. The grainyness of the movie was obvious.)
I'll try to find more info on this, and once I have the DVD, I'll play aroud with it, and post it here.
cheers!
cordraconis
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