[MPlayer-DOCS] Mess in mencoder.xml's examples

[Diego Biurrun]

On Wed, Nov 23, 2005 at 09:10:47AM +0100, Guillaume Poirier wrote:
> Diego Biurrun wrote:
> > On Mon, Nov 21, 2005 at 11:13:13AM +0100, Torinthiel wrote:
> > 
> >>I've found that examples in mencoder.xml (and probably
> >>encoding-guide.xml as well, but I haven't examined it yet) are in a bit
> >>of mess. So:
> >>
> >>There are two examples of two-pass encoding. One with copying audio and
> >>one with reencoding it. Can someone tell me why in the first output from
> >>first pass goes to /dev/null and in the second to output.avi? IMHO it
> >>should be /dev/null both.
> > 
> > Can anybody with some encoding knowledge answer this?
> 
> Well, the idea is too keep only the video from the last pass of
> multipass encode. Why is that? That's because the last pass produces a
> video with greater quality that all the previous ones.
> Why do you want to write the previous pass to /dev/null? Mainly because
> you won't keep those files anyway (but keep in mind that even if the
> video is written to /dev/null, the stat file is still written on disk),
> and because that way you don't generate needless I/O.

IOW /dev/null is preferable since it speeds up the encoding process,
right?  Then we should use /dev/null in our examples.

Torinthiel, commit :)

Diego