x264, 2 pass vs 3 pass

slipknot! · 2nd June 2009, 05:52

I always use sharktooth's DXVA-SD-Insane profile + 3-pass method for encoding DVDs. But it takes much more time than 2-pass.
What does actually the third pass add to the final video? The better ipb frames arrengment or the more exact final bitrate (size) or what?

Dark Shikari · 2nd June 2009, 05:54

Nothing. It's a placebo.

slipknot! · 2nd June 2009, 06:08

Hmmm... So why don't you delete it in the next realise?

LoRd_MuldeR · 3rd June 2009, 00:21

Quote:

Originally Posted by slipknot!

Hmmm... So why don't you delete it in the next realise?

...because the x264 developers are not MeGUI developers. And because people out there want such insane/placebo profiles

Sharktooth · 3rd June 2009, 03:43

however... just to clear things up, there are no 3-pass presets in MeGUI. if you want one you have to create it.

slipknot! · 11th June 2009, 16:02

There is no such a preset, but you can choose "automated 3pass mode" in the "Encoder settings (x264 configuration dialog)"

nakTT · 11th June 2009, 19:02

Quote:

Originally Posted by slipknot!

There is no such a preset, but you can choose "automated 3pass mode" in the "Encoder settings (x264 configuration dialog)"

Yes. Thats what I did with my MEGui all these while. But since the developer himself told us that its a placebo, then from now on I can live happily with 2-pass knowing that 3-pass is not needed.

Quote:

Originally Posted by Dark Shikari

Nothing. It's a placebo.

2nd June 2009, 05:52	#1 \| Link
slipknot! Registered User Join Date: Dec 2008 Location: Russia Posts: 89	x264, 2 pass vs 3 pass I always use sharktooth's DXVA-SD-Insane profile + 3-pass method for encoding DVDs. But it takes much more time than 2-pass. What does actually the third pass add to the final video? The better ipb frames arrengment or the more exact final bitrate (size) or what? __________________ play hard go pr0 dmg / slipknot!

2nd June 2009, 05:54	#2 \| Link
Dark Shikari x264 developer Join Date: Sep 2005 Posts: 8,666	Nothing. It's a placebo. __________________ Follow x264 development progress \| akupenguin quotes \| x264 git status ffmpeg and x264-related consulting/coding contracts \| Doom10

2nd June 2009, 06:08	#3 \| Link
slipknot! Registered User Join Date: Dec 2008 Location: Russia Posts: 89	Hmmm... So why don't you delete it in the next realise? __________________ play hard go pr0 dmg / slipknot!

3rd June 2009, 03:43	#5 \| Link
Sharktooth Mr. Sandman Join Date: Sep 2003 Location: Haddonfield, IL Posts: 11,768	however... just to clear things up, there are no 3-pass presets in MeGUI. if you want one you have to create it. __________________ MPEG-4 ASP Custom Matrices: EQM V1(old), EQM AutoGK Sharpmatrix (aka EQM V2), EQM V3HR (updated 01/10/2004), EQM V3LR, EQM V3ULR (updated 04/02/2005), EQM V3UHR (updated 17/12/2004) and EQM V3EHR (updated 05/10/2004) Info about my ASP matrices. MPEG-4 AVC Custom Matrices: EQM AVC-HR Info about my AVC matrices My x264 builds. Mooo!!!

11th June 2009, 16:02	#6 \| Link
slipknot! Registered User Join Date: Dec 2008 Location: Russia Posts: 89	There is no such a preset, but you can choose "automated 3pass mode" in the "Encoder settings (x264 configuration dialog)" __________________ play hard go pr0 dmg / slipknot!

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