The simplest way of getting constant image quality?

[bot]

(Providing the source is up to it).

Regardless of codec, would it be to fix the quantification to just one factor?

Are there codecs that are more or less suited for constant image quality?

Dito in one pass?

[Soulhunter]

Originally posted by bot
The simplest way of getting constant image quality?
You have to test/decide this for your self... ;)

Or, when you are too lazy, try the settings of my signature !!!


Bye

[bot]

It was actually your signature that prompted the question :D

[Soulhunter]

Originally posted by bot
It was actually your signature that prompted the question :D LOL... :D

Really true ???

Cool, but note that I do my encodes at 1024x576 res. + AC3 for 1x blank DVD-R !!!

Examples... (http://forum.doom9.org/showthread.php?s=&postid=444013#post444013)


Bye

[bot]

Do you upsample image resolution from normal region 2 DVDs?

And, about the posting in the other thread, wouldn't one pass fixed quant encodings from captures result in larger file sizes than recoding DVDs?
I'm assuming that the DVD video (as opposed to captures) is already in optimized vbr mpeg2, so that you get identical image degradation all over the film with constant quant.

[bond]

Originally posted by bot
Regardless of codec, would it be to fix the quantification to just one factor?variable bitrate two pass leads to constant quality, not fixed quants

[Soulhunter]

Originally posted by bond
variable bitrate two pass leads to constant quality, not fixed quants But highest possible quality in 2pass mode would be still if all quants are 2... Not ???

Bye

[bond]

hm i doubt that 2pass is a good idea with fixed quants :D

[Soulhunter]

Originally posted by bond
hm i doubt that 2pass is a good idea with fixed quants :D Man, I meant it this way...


Some source with 2Pass @1000 kbp/s = avg. quant of 4

Same source with 2Pass @1500 kbp/s = avg. quant of 3

Same source with 2Pass @2000 kbp/s = avg. quant of 2

Same source with 2Pass @9000 kbp/s = avg. quant of 2

Note: Not unconditional valid...


Means that a avg. quant of 2 is the highest possible quality, also in 2Pass mode !!!


What file would looks better...

This one ???

Frames: Q2, Q3, Q3, Q4, Q4, Q4, Q3, Q3, Q3, Q2, Q2, Q3, Q4... etc.


Or this one ???

Frames: Q2, Q2, Q2, Q2, Q2, Q2, Q2, Q2, Q2, Q2, Q2, Q2, Q2... etc.


Bye

[bond]

which quants would give the best quality is depending on the desired bitrate

[Soulhunter]

Originally posted by bond
which quants would give the best quality is depending on the desired bitrate Yeah, but you cant get low quants with low bitrates... :D

Sure, If you wanna fix a 120 min. movie on a single CD-R, theres no other way than using 2Pass !!!

I dont mean fixed quant. encoding is nice...

Only that fixed quant. 2 encoding is nice !!!

Because "all quants = 2" is the best result you can get !!!

And with the capacity of a blank DVD-R you dont have to care about filesize !!!

But thats just my opinion as an HQ-freak... ;)


Bye

[r6d2]

Originally posted by Soulhunter
Because "all quants = 2" is the best result you can get !!!Wouldn't also using only I-frames improve it even more?

[Soulhunter]

Originally posted by r6d2
Wouldn't also using only I-frames improve it even more? Hmm...

Where can I find this option in XviD ???

LOL... :D :D :D

Haven't tried it yet !!!

I guess the filesize would be 2x bigger than normal... :rolleyes:

So, this would break the size-limit of a DVD-R !!!

Also not sure if the quality raise would be worth it... ;)


Bye