Quantcast Is it Worth Using Filters on a Movie? - digitalFAQ.com Forums [Archives]
  #1  
03-16-2004, 04:07 AM
zaanvander zaanvander is offline
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Is it worth using all the filters and such, if you are only going to be making one movie.

I`m making 720x576 and only using the .d2v file and notch matrix.
The conversion is very quick.

I have 4,7G disk space per Dvd so why would I bother going the other way?

Just asking for some opinions

Thanks
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  #2  
03-16-2004, 04:16 AM
Dialhot Dialhot is offline
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I think that a script is always necessary but for a DVD to DVD copy I don't use a big script. A little spatial filter, a little temporal one. That's enougth.
I also crop the picture to 704*576 and add an overscan of 2 because there is really no need to encore a picture where the TV set won't display the area !

Something like :
Code:
Crop(8,0,704,576)
Fluxsmooth()
TemporalCleaner(5,10)
Letterbox(16,16,16,16)
This way the CQ raises from 5 points at least (or the Q factor under CCE gain 2 or 3 points).

Now, if you already encode at a CQ of 90, there is no need to do that as you won't gain anything visually in doing it at 95 .
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  #3  
03-16-2004, 04:19 AM
zaanvander zaanvander is offline
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  #4  
03-16-2004, 05:35 AM
jorel jorel is offline
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Phil and zaanvander
this is an telepatic forum, questions and answers came like waves!

i was thinking to ask seamless question:
i did a sample without any resize loading only the source and was faster.
if my target will be kdvd from dvd source,than i don't need resize...
what i can remove in this lines but still getting overscan 1 or 2:

script from MovieStacker with overscan 1:

BicubicResize(704,352,0,0.6,0,0,720,480)
AddBorders(8,64,8,64)

Phil, you wrote too:
"This way the CQ raises from 5 points at least (or the Q factor under CCE gain 2 or 3 points)."

my doubt:
Q factor in CCE is inverse, don't?
Q20 will give better reult than using Q40, right?

thanks in advance!

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  #5  
03-16-2004, 05:48 AM
Dialhot Dialhot is offline
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Quote:
Originally Posted by jorel
if my target will be kdvd from dvd source,than i don't need resize...what i can remove in this lines but still getting overscan 1 or 2:
If you don't want to resize, that mean that your overscan will be done by overlapping. And that is the letterbox command that do that.

Letterbox(8,8,8, for overscan 1
Letterbox(16,16,16,16) for overscan 2.

Quote:
script from MovieStacker with overscan 1:

BicubicResize(704,352,0,0.6,0,0,720,480)
AddBorders(8,64,8,64)
You take a frame that is 720*480 (as told by the 2 last parameters) you resize it to 704*352 (2 first parameters) then add 64+64 pixels of borders ??? You can imagine easily how the A/R will be screwed up by this !

The correct way is simply :
Code:
Crop(704,480,8,0)
Letterbox(8,8,8,8) # overscan 1
or even, if you want to have a 720*480 target (that I never do, 704 has the same quality, no need to go to 720...)
Code:
Letterbox(8,8,8,8) # overscan 1
That's so simple !

Quote:
my doubt:
Q factor in CCE is inverse, don't?
Q20 will give better reult than using Q40, right?
You are right. I didn't remember at the moment the opposite of the verb "to raise" so I just tell "Q factor will gain some points"
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  #6  
03-16-2004, 06:29 AM
jorel jorel is offline
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great!
"The correct way is simply :

Code:
Crop(704,480,8,0)
Letterbox(8,8,8, # overscan 1"

yes, better Q(cce) and/or CQ(tmpgenc) and fast encode!

"... "to raise".... "Q factor will gain some points" "

right, very clear!


big thanks Phil (faster and precise as always) !
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