Inverse Proportionality Between the Resolution of Film? - digitalFAQ.com Forums [Archives]
 digitalFAQ.com Forums [Archives] Inverse Proportionality Between the Resolution of Film?

#1
06-21-2004, 09:12 AM
 zagor Free Member Join Date: Feb 2004 Location: Italia Posts: 226 Thanks: 0 Thanked 0 Times in 0 Posts
Exists an inverse proportionality between the resolution of film and its codifies through Q in the CCE?

as an example
divx 352x288
352x288=101376/10000=10
I codify with Q=10

544x326=177344/10000=17
I codify with Q=17

Someone has made experimentations in so far as?

What thoughts you of this my hypothesis?
byby
Someday, 12:01 PM
 Site Staff / Ad Manager Join Date: Dec 2002 Posts: 42 Thanks: ∞ Thanked 42 Times in 42 Posts
#2
06-21-2004, 09:21 AM
 Dialhot Free Member Join Date: May 2003 Posts: 10,463 Thanks: 0 Thanked 0 Times in 0 Posts
There is no relation between the two except that the more pixel you have, the more you have to raise the Q factor to obtain the same file size in the end.

But your equation don't take in account the length of the movie, and that is what count the most.

More over, on 544*576 pixels you have a lot of pixels that count for "nothing" : the black borders !
(or you already removed them ? you typed 326 and not 576)

For instance all my movies are done in 704*576 and the Q used range between 10 and 30 according to the movie length (and the final file size I want to obtain).
#3
07-10-2004, 04:10 AM
 fingerbob Free Member Join Date: Mar 2004 Location: Scotland Posts: 124 Thanks: 0 Thanked 0 Times in 0 Posts
Hi Dialhot

You say that you do all your movies in 704*576 using a Q of between 10-30.

Since you are saying this in the AVI forum, are you saying that you are resizing AVI's to DVD resolution to do this?

I always understood your thinking to be that resizing upward would ALWAYS result in reduced quality. I also thought you were trying to encourage people to get the best possible Q for any encode. 10-30 doesn't sound very high.
#4
07-10-2004, 06:58 AM
 Dialhot Free Member Join Date: May 2003 Posts: 10,463 Thanks: 0 Thanked 0 Times in 0 Posts
Quote:
 Originally Posted by fingerbob Since you are saying this in the AVI forum, are you saying that you are resizing AVI's to DVD resolution to do this?
Lol. No.: I just didn't remember the name of the forum

For avi sources, as my standaloen supports anything on a KDVD even if it is not standard, I use 544*576 and I encode using tmpgenc, viddeo bitrate 64-3000 and CQ between 80-90. And I put 3 movies on a disc.

Quote:
 I always understood your thinking to be that resizing upward would ALWAYS result in reduced quality.
You that is always the case

Quote:
 I also thought you were trying to encourage people to get the best possible Q for any encode. 10-30 doesn't sound very high.
You should read the thread again : here we were discussing about CCE. In this, the best quality is Q=1, the worst Q=100. And for me above Q=30 the result is not really watchable (others will say above 40).
#5
07-10-2004, 05:58 PM
 fingerbob Free Member Join Date: Mar 2004 Location: Scotland Posts: 124 Thanks: 0 Thanked 0 Times in 0 Posts
oops CCE. I read CCE but my mind told me TMPGEnc

sometimes the old eyes and mind don't work as a partnership.

anyway, another mystery (for me) solved
#6
07-10-2004, 06:40 PM
 Dialhot Free Member Join Date: May 2003 Posts: 10,463 Thanks: 0 Thanked 0 Times in 0 Posts
Do you need a scotish translation ?
#7
07-10-2004, 06:51 PM
 fingerbob Free Member Join Date: Mar 2004 Location: Scotland Posts: 124 Thanks: 0 Thanked 0 Times in 0 Posts
Well if you can make it sound like Groundskeeper Willie from The Simpsons, then you'll be sounding like me in no time

Actually, my accent is closer to Shrek - Mike Myers does a 'passable' accent but being Scottish, I can spot a fake a mile off.

Dialhot, you must be multilingual then - French, English and a touch of Portuguese? Impressive. I can speak a small amount of Norwegian, but I don't see any Norsk people in here.

Actually, why is it only really Portuguese and English in here? Why not other languages? Is it cos some of the 'gurus' are from Portugal?
#8
07-10-2004, 07:08 PM
 Prodater64 Free Member Join Date: Mar 2003 Location: Palma de Mallorca - España Posts: 2,925 Thanks: 0 Thanked 0 Times in 0 Posts
How about spanish? It has a little bit of movement.
But Italian, German and French are so quiet.
#9
07-10-2004, 07:10 PM
 Dialhot Free Member Join Date: May 2003 Posts: 10,463 Thanks: 0 Thanked 0 Times in 0 Posts
Quote:
 Originally Posted by fingerbob Dialhot, you must be multilingual then - French, English and a touch of Portuguese?
Actually, in order or fluentlyness (english ?) : french, english, italian, spanish and really few portuguese.

Quote:
 Actually, why is it only really Portuguese and English in here? Why not other languages? Is it cos some of the 'gurus' are from Portugal?
Worse : except Rui, there are all Brazilians

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