[MPlayer-dev-eng] [PATCH] Manpage update for vf_divtc

[Rich Felker]

On Tue, Jun 07, 2005 at 12:30:46AM +0200, Diego Biurrun wrote:
> Rich, OK to commit?

yes. and please no top-posting. :)

rich

> 
> Diego
> 
> On Wed, Mar 02, 2005 at 07:32:20PM +0200, Ville Saari wrote:
> > Here is a more thorough description of the two pass mode of vf_divtc
> > for the manpage. Not necessarily easier to understand, but hopefully
> > harder to misunderstand.
> > 
> > -- 
> >  Ville
> 
> > --- DOCS/man/en/mplayer.1.orig	2005-03-02 11:34:18.659260000 +0200
> > +++ DOCS/man/en/mplayer.1	2005-03-02 12:48:31.504550793 +0200
> > @@ -4945,21 +4945,29 @@
> >  This filter is intended to find and drop those duplicates and restore the
> >  original film framerate.
> >  When using this filter, you must specify \-ofps that is 4/\:5 of the fps of the
> > -input file (23.976 if the input is 29.97fps).
> > +input file and place the softskip later in the filter chain to make sure
> > +that divtc sees all the frames. 
> > +Two different modes are available:
> > +One pass mode is the default and is straightforward to use, but has the
> > +disadvantage that any changes in the telecine phase (lost frames or bad
> > +edits) cause momentary judder until the filter can resync again.
> > +Two pass mode avoids this by analyzing the whole video beforehand so it
> > +will have forward knowledge about the phase changes and can resync at the
> > +exact spot.
> > +These passes do
> > +.B not
> > +correspond to pass one and two of the encoding process.
> > +You must run an extra pass using divtc pass one before the actual encoding
> > +throwing the resulting video away.
> > +Use \-nosound \-ovc raw \-o /dev/null to avoid wasting cpu power for this pass.
> > +You may add something like crop=2:2:0:0 after divtc to speed things up even
> > +more.
> > +Then use divtc pass two for the actual encoding.
> > +If you use multiple encoder passes, use divtc pass two for all of them.
> >  The options are:
> >  .RSs
> >  .IPs pass=1|2
> >  Use two pass mode.
> > -This produces best results.
> > -Pass one analyzes the video and writes the results to a log file.
> > -Pass two then reads this log file and uses the information to do
> > -the actual work.
> > -Note that these passes do
> > -.B not
> > -correspond to pass one and two of the encoding process.
> > -In order to use divtc two pass with two pass video encoding, you must perform
> > -three passes: first divtc pass one and encoder pass one, then divtc pass two
> > -and encoder pass one, and finally divtc pass two and encoder pass two.
> >  .IPs file=<filename>
> >  Set the two pass log filename (default: "framediff.log").
> >  .IPs threshold=<value>
> 
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