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22nd May 2004, 22:56
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#1 | Link |
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heretic nuB
Join Date: Sep 2003
Posts: 65
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fixed quant encode vs. 2-pass at same filesize
Hi,
i was doing some encodings of the same source with both fixed quant modes and 2-pass, which gave me very near filesizes and similar average quants for the 2-pass encode. So i was wondering if its safe to say that the 2-pass encode should have subjective better quality, considering that the encoder can do "more inteligent" quant distribution decisions. I am in doubt if that is true in this particular situation because i used q=2 in the fixed quant one, which means that in the 2-pass both lower and higher quants were used to achieve the same average and I don't see much benefit in using q=1. Or am I wrong? Can a mixed quant (with q's=1) encode surpass the quality of a fixed quant=2? I would investigate myself if i hadn't deleted one of the files (the question only came later to me). thanx in advance. |
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23rd May 2004, 04:50
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#5 | Link |
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Registered User
Join Date: Jun 2002
Location: Adelaide, Australia
Posts: 1,166
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Single-pass fixed quant gives better results than two-pass. Don't count on ratecontrol being inteligent, it's not - you can make it more inteligent by extra curve compression settings, but if you don't, it's just as stupid as computers are.
Soulhunter  what kind of xvid do you have...?Radek |
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23rd May 2004, 05:11
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#6 | Link | |
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Leaker!
Join Date: Apr 2003
Location: Unknown
Posts: 2,773
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Quote:
 Anyhow I can only tell what the GUI tells me !!! And for the version...   Bye |
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23rd May 2004, 06:34
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#9 | Link | |
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h4x0r5 0n teh yu0r pC?
Join Date: Nov 2003
Posts: 156
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Quote:
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23rd May 2004, 17:28
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#10 | Link |
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Leaker!
Join Date: Apr 2003
Location: Unknown
Posts: 2,773
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Yeah, this confuses me too...
Something seems to be very wrong with my box !!! Here I download the latest XviD build...  Here is the downloaded file I install then...  But the GUI still shows me this...  Even after re-boot, un-install, re-install its the same...  Bye Last edited by Soulhunter; 23rd May 2004 at 17:30. |
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23rd May 2004, 17:43
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#11 | Link | |
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ffdshow/AviSynth wrangler
Join Date: Feb 2003
Location: Austria
Posts: 2,403
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Quote:
np: Richard Devine - Halicrafter (Asect : Dsect) |
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23rd May 2004, 18:07
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#12 | Link |
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Leaker!
Join Date: Apr 2003
Location: Unknown
Posts: 2,773
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Hmm, the registry entry shows its v.1 !!!
 No problem I think I its time to install WinXP on my 2nd HD... If I see a fresh XviD v.1 then, I simply swap all my other files to it (except the windows stuff..) !!! So, I see ya back in estimated 4 hours... Bye |
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23rd May 2004, 22:18
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#14 | Link |
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Registered User
Join Date: Feb 2004
Posts: 103
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@Soulhunter, I had the same XviD problem as well for the longest time. I think we both used the same faulty installer, and I suppose many others have same problem as well (check now!!!). My only way to uninstall XviD was to finnally delete every reference I found in the registry (it's in about 6 places). Only then did the Koepi's installer work. From now on I uninstall instead of trusting it'll upgrade.
Others, if you've installed XviD multiple times, you should definitely check your version... |
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23rd May 2004, 22:50
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#15 | Link |
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Leaker!
Join Date: Apr 2003
Location: Unknown
Posts: 2,773
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Someone knows what causes this obscurity ???
Was it really the Selam build Ive used, or v.1 with a Selam info GUI... No matter, everything works well now !!! Time to start the next encode...  Bye Last edited by Soulhunter; 23rd May 2004 at 22:54. |
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