[MEncoder-users] x264 2-pass, FAAC, smearing

[Robert Ramiega]

On Thu, Jan 15, 2009 at 03:40:06PM +0200, GM wrote:
> Using those options, you are messing up quality.
> This is because the first pass will have wrong bitrate distribution when
> applied to your second pass.

 I think you've got it wrong. John might get A-V sync issues but I believe
audio bitrate does not influence video bitrate distribution in any way.


> 
> This means that on scene changes 1-2 frames will be really blurry. You
> might not notice it unless you skip frame-by-frame and it might happen
> with only some videos, but it will be there due to how 2-pass encoding
> works.
> 
> On Thu, 2009-01-15 at 08:17 -0500, John Ratliff wrote:
> > GM wrote:
> > > Yes, I have.
> > >
> > > -nosound screws up audio sync, because obviously sound is not processed.
> > > harddup is ALWAYS used, since I remux the video later anyway, but this
> > > is of no concern at all here, because the messed up video comes out of
> > > mencoder, not because of remuxing later.
> > 
> > Please note I am an encoding novice and know next to nothing at all... 
> > I'll just let you know what works for me. I'm reencoding DVD's into 
> > matroska with x264 video and ogg audio. I use external ogg encoder, and 
> > mencoder for x264. I use -nosound for first pass, then oac copy for 
> > second. Audio will desync for me if I use nosound for both passes. I 
> > can't remember if I got bad result with oac copy for both or not, but I 
> > do remember the audio desync with nosound for both. I use mkvmerge to 
> > build matroska container.

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