Compressibility > then 100% ?!

[FreierGeist]

Hi,
i'm using GKnot as a "tweaker" to the Nandub settings and i'm having an odd trouble
i'm loading a .d2v project (without ForcedFilm) lowering the FPS to 23.976, trying to reach 1CD@700mb, balancing the Bits/(Pixel*Frame) and the resolution/compressibility, reizing with Aspect Error=0%, setting the right Aspect ratio (4:3, btw @ 1.66:1), selecting the "Inverse Telecine" and saving the .avs
then i load this .avs with Nandub and do a first pass (Fast Recompress)
then i go back to GKnot and load the .stats file, and the compressibility goes to 116% !!! :(
please, someone enlighten me
:)
thank you all!

[]s

[MaTTeR]

I'm not a Gknot guru so perhaps someone else can enlighten the both of us.

However, my way of getting around this is to raise the resolution higher. Problem is you can only go so high before your Zoom percentage goes to the red zone, over 100%.

[FreierGeist]

unfortunatly i'm reaching this red zone
:(
and if i increase my resolution then my Bits/(Pixel*Frame) goes under 0.18/0.19 :(
thanks!
:)

[]s

[FreierGeist]

damn strange!
:(

[MaTTeR]

I don't have this problem if I'm trying for 1 CD, it only happens when I'm trying 2 CDs. Maybe were just overlooking something simple?

The only real fix I've found is to lower the output file size from 1400MB to 1200MB or so. It's worked so far but I rather fill the CDs:)

[j3rrich0]

If I read everything correctly in the gknot help file then you don't have to stay above .20 it's just suggested. If you need to go lower then do so. The .20 is just a guideline and most of the time works okay. I recently encoded a movie that compressed almost too well, I had to go down to .17 in order to reach the one cd mark and that was really close to being too big. So just lower it if you have to.

[LotionBoy]

The bits per pixel is just a guess to help you start out. Once you encode a stats file, the stats file is what you should pay attention to, not bits per pixel. Bits per pixel is not an accurate judge of quality because the # of bits per pixel needed for a good encode varies greatly depending on the compressibility of the movie. Use bits-per-pixel to choose a resolution to do a first pass or a compressibility test at, but after that you can ignore it.

LotionBoy

[MoonWalker]

And if your compressibility test is above 100% you can proceed with your movie.You will not be able to reach you desired file size but you will have the maximum quality...

[FreierGeist]

thank you all
but i think it doesnt help since i use .stats (generated at the firt pass) to create a .ecf with GKnot...
and this .ecf cant be created if the Compressibility > 100% :(
but, when i load my .stats at the "Nandub Files" it says "d2v not matching stats (video is 43746 frames longer)"
but, since im working with a 4:3, 29.970, NSTC (low porcentage +- 50%), Interlaced/Progressive, i assume that have do IVTC
well, then i load my .d2v and i set the FPS to 23.976 at GKnot and save my .avs that will direct Nandub to creat a .stats (firts pass)
and then i load this .stats at "Nandub Files" and it says "d2v not matching stats (video is 43746 frames longer)"
:(:(
i cant see what im doing wrong here
:(

thanks
[]s

[FreierGeist]

hmmmm....
but after the "d2v not matching stats (video is 43746 frames longer)" it shows another message: "Numbers of frames not matching! Enter number of frames into calculator?"
do i select "yes"?
is that right?
would this affect the whole process?
how?

THANKS!

[]s

[TheWEF]

if you do ivtc you cannot open the stats and the video (d2v) at the same time later on. - you can, but they don't match (because ivtc reduces the framerate and you have less frames).

and this .ecf cant be created if the Compressibility > 100%

why? open the stats and save an ecf...
you cannot calculate a new curve, though. why? - please read the new faq or the how-to that comes with the program.

wef.

[FreierGeist]

thanks TheWEF, but, what its recommended?
cuz, the way im trying to encode its: load .d2v (a set the framerate to 23.976 cuz i have to perform IVTC and i select Inverse Telecine when im going to save the .avs) then i save the .avs
but, i see it, when load the .stats (created trough this .avs) + the .d2v then i get the frame numbers incompatibility
what do i have to do? please...
maybe i could leave the framerate at 29.970... or when i load the .stats i could select "Yes" for the Numbers of frames not matching! Enter number of frames into calculator?" message...???
thanks again
and sorry for bothering you...

[]s

[manono]

Hi-
One way I've found to get around the problem is to create a second .d2v with forced film. Then, after you finish the first pass, load the 24fps .d2v, and then the stats file (you may be a couple of frames off, but just answer "yes" to the question). That'll be good enough to play with keyframes, check out the graph, pick the beginning of the end credits, or whatever you might want to do while creating the modified stats file.

It's not a good idea to change the frame rate to 24fps after you've loaded a 30fps .d2v.

[FreierGeist]

does the "Inverse Telecine" filter automatically change the FPS to 23.976 (even if the source is 29.970)?
cuz if i use ForcedFilm .d2v AND a IVTC (i think that its obligate for this case) my FPS will be something like 19.xxx ...
thats another doubt
:(
thanks manono!!!
:)

[]s

[manono]

Hi FreierGeist-Yes it does. I wasn't suggesting performing IVTC on a forced film .d2v. I was suggesting making one so that you could open it and the stats file and have a similar number of frames after the first pass. Yes-perform IVTC on your original 30fps .d2v.

I didn't mean to confuse things. I was trying to make it easier to scroll your movie after the first pass with IVTC.

[FreierGeist]

hmmm
i got it
thanks!
now im going to do IVTC on a 29.970 .d2v
and, i think the .avs saved will be with a 23.976 framerate
thank you!
;)

[]s

[FreierGeist]

am i right?
or ill screw up my project?

thnaks!

[]s

[manono]

Yes-you're right, but it's half a day later now, and by now you should have found out. You can always find out what the finished frame rate is going to be by loading the .avs and then going File-File Information.

[FreierGeist]

thank you all for the help!
;)

[]s