Cinefórum-Clásico

professor keller escribió:Hi Alan,

First, welcome to Cinefórum-Clásico! Second, I'm afraid I'm not the "king" mentioned by Bunker; I'm just a guy who learnt a couple of things from some wizz kids. If you want to contact some more experienced rippers than me you should try Dardo or Roisiano (not sure if they can communicate in English though).

Just a few comments on you notes:

xuguang_he escribió: As for "--preset", is there a big difference between "slow" and "veryslow"? The loss in picture quality or anything else?

Yes, if you're aiming for quality, there's a big difference. Preset veryslow is far more efficient to get the most of the encoding process.

xuguang_he escribió:I have also noticed that, in some of the black-and-white pictures rip, rippers use this in command line: --no-chroma-me. What does it mean? Just to keep the picture in black-and-white and not to have color deviation? And how could I judge when should I use this or not?

Yes, --no-chroma-me (or other similar presets) is just to keep the picture in pure B&W with no color deviation. And you don't have to judge it at all: if you are about to rip an entirely B&W film, just use it. You only need to be completely sure that the original film was shot in B&W and doesn't have any color or tinted scenes on it.

xuguang_he escribió:As for the "--sar", could I use ARS Calculator to calculate out the sar number?

You could, but you better don't In all my knowledge, the best way to get the best SAR calculation is using your eyes. You just need to copy some code on notepad and save it as *.avs file (you must edit all paths, of course). I'm quoting elguaxo:

elguaxo escribió:We'll save the script as my.movie.avs. It looks for example like this one:

Código: Seleccionar todo

DGDecode_mpeg2source("I:\VTS_01_1.demuxed.d2v")

crop( 52, 14, -52, -14)

From DGIndex's report we are going to see if the DVD is PAL/NTSC, Fullscreen/Widescreen. Remember:

720x576 = PAL
720x480 = NTSC

4:3 = Fullscreen
16:9 = Widescreen

We'll save this script below as SAR.avs under the same folder of my.movie.avs. We are going to edit format and wide according to the data reported by DGIndex.

Let's open SAR.avs in VDM. Don't mind the black border's you'll see now, just focus on the AR. Look at many many screens to decide if it's ITU or not. The third line says x264 --sar and a number, for example 40:33. Write it down. That's the Pixel Aspect Ratio aka SAR (Sample Aspect Ratio).

Código: Seleccionar todo

avsfile = "my.movie.avs"  # Encoding script
format  = 1             # 1=NTSC, 0=PAL
wide    = 1             # 1=Widescreen 16:9, 0=Full screen 4:3
#########################
ITU     = (format==1?10:12)/11.0*(wide==1?4.0/3:1)
SARs    = """"12:11","16:11","10:11","40:33","16:15","64:45","8:9","32:27""""
ITUprof = "SDB "+(wide==1?"ANAMORPHIC ":"")+(format==1?"NTSC":"PAL")
i=import(avsfile).converttorgb
i
ab = round(height*(sqrt(45.0/44)-1))
a = spline36resize(round(width*ITU),height)
a = a.addborders(0,floor(ab/2.0),0,ceil(ab/2.0))
bb = width(a)-round(width*ITU/sqrt(45.0/44))
b = spline36resize(round(width*ITU/sqrt(45.0/44)),height+ab)
b = b.addborders(floor(bb/2.0),0,ceil(bb/2.0),0)
interleave(a,b)
scriptclip("""subtitle("Playback Resolution: "+\
string(round(width(i)*ITU*pow(44.0/45,current_frame%2)))+"x"+string(height(i))+\
"\nMeGUI Profile: "+ITUprof+(current_frame%2==1?" NON-ITU":"")+\
"\nx264 --sar "+eval("select(2*format+wide+current_frame%2*4,"+SARs+")"),lsp=0)""")

Regarding filters, best rippers usually doesn't like filters (mostly). Generally speaking, we're not interested in "improving" the source. Our aim is to get the most of the DVD in order to produce the most "transparent" rip that we can.

Best regards!

reid escribió:Lo he solucionado poniendo 0 en format y wide. Lo entendí al revés.
Ahora me salen 12:11 ITU (más chafado sin lineas negras a los lados) y 16:15 non ITU (menos chafado sin lineas negras arriba y abajo). ¿Por cúal me he de decidir?