[MEncoder-users] mencoder new 3 pass encoding

[Dominik 'Rathann' Mierzejewski]

On Thursday, 03 March 2005 at 09:40, ivan wrote:
> hi all. im' trying to use the new 3 pass encoding, as described in the
> man page of mplayer 1.0pre6-3.3.5. 
[...]
> this is all the doc i can find. the questions are : 
> 
> 1) does this method still need the step 
> "mencoder -ovc frameno -o frameno.avi  .... " ? mencoder actually
> compliains about "File not found: 'frameno.avi Failed to open
> frameno.avi" but the process goes well. 

This step was never necessary. You can encode (or streamcopy) audio every
time, and sometimes it help to keep AV sync, when using frameno breaks it.

> 2) is "psnr" needed in all the passes ?

It was never necessary. It's merely informational.

> 3) how many vpass=3 can i do ? the "man" says Nth, so i can refine the
> encoding "ad libitum", running the last pass 6 or 7 times. the cpu time
> is not a problem :)

As many as you like. Though in practice, more than 4 usually yield no
better results.

HTH,
R.

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