Maximum Quality vs Target quality

[giovannibruno]

What's the difference in autogk encoding a divx (or xvid) choosing target quality = 100% or maximum quality?
Thank you, sorry for my poor english

[len0x]

two points:
- width of 720 vs 704 (max qual vs 100%)
- no-bframes vs 1-bframe

[ukb007]

If you've understood Mr len0x's post above, can you unzip (expand) it in plain English to me? I am sorry, I can't read Promish (the language used by the gods, also known as programmers. I hear it's a dialect of the English language, but I find little or no similarity other than the same alphabet used by the two).

Regards to both you and len0x.

[Soulhunter]

VS = VERSUS = AGAINST or IN CONTRAST TO

The plaintiff versus the defendant...


MAX = MAXIMUM = THE GREATEST POSSIBLE QUANTITY

The maximum temperature...


QUAL = QUALITY = DEGREE OR GRADE OF EXCELLENCE

The quality of mercy is not strain'd...


Bye

[Mnl]

Hi ukb007

What Len0x means is that in 100% quality mode, the picture is resized to a horizontal resolution of 704 pixels, and b-frames are used.

In maximum quality, the original horizontal resolution of 720 pixels is kept, and b-frames are not used. Normally you would think that using b-frames would yield better quality, and normally it does - but only because they raise the compressibility of the video, thereby making the overall quality better at a given filesize. However, if you don't care about filesize at all, it is actually better not to use b-frames.

Regards, Mnl

[ukb007]

Thanks, Soulhunter, for your scintillating explanation. It was most useful.

Thanks, Mnl, for being so near to earth where I can actually feel you.

Regards to all.

[len0x]

As of 1.35 maximum width is now source dependent for both Maximum quality and quality based modes.