[MEncoder-users] mencoder skipping frames.

[Rich Felker]

On Thu, Jul 07, 2005 at 08:14:28PM -0500, Mike Hodson wrote:
> try -vf filmdint, -fps 29.970 -ofps 23.976
> this should force input fps to be treated as 29.97 with a telecine,
> and the filmdint plugin will take it down to progressive 24fps aka
> 23.976. i've had good luck with these options before.


-fps should not be used for cases like this. it will either do nothing
or cause a/v desync. second, 29.97 and 23.976 are _wrong_. the numbers
are 30000/1001 and 24000/1001.

and... please do not top post!

rich


> 
> On 7/7/05, AaronL <alee at ifa.hawaii.edu> wrote:
> > I did a few more runs and here's what I've collected.
> > I watched the demux_mpg output messages and it's like the following:
> >  From 0 seconds to 28 seconds, the video has mixed 24000/1001 and
> > telecined 30000/1001 frames.
> >  From 29 seconds to the end of the video, it's all progressive
> > 24000/1001 frames.
> > I did tried "-mc 0" and the skipping went away but, the a/v are not in
> > sync.  The video lags the audio.
> > I also tried "-vf pullup,softskip" and that created duplicate frames as
> > well as skip frames.
> > So I tried to cut the first 28 seconds off with "-ss 0:00:29" but then
> > mencoder hangs or gets confused because I hear my DVD drive seeking
> > constantly but no encoding ever starts and I have to kill mencoder.
> > 
> > 
> > 
> > 
> > Rich Felker wrote:
> > 
> > >On Wed, Jul 06, 2005 at 08:45:25PM -0700, RC wrote:
> > >
> > >
> > >>On Wed, 06 Jul 2005 16:31:24 -1000
> > >>AaronL <alee at IfA.Hawaii.Edu> wrote:
> > >>
> > >>
> > >>
> > >>>Why is mencoder skipping frames on 24000/1001 progressive content
> > >>>when I'm trying to encode with the same -ofps 24000/1001?
> > >>>
> > >>>
> > >>Perhaps to keep A/V sync...  Try with "-mc 0" and you probably won't
> > >>get any skipped frames (though it might desync).
> > >>
> > >>
> > >
> > >Nope. The problem is that the video is not 24000/1001 fps but
> > >30000/1001 fps, i.e. it's either hard telecined or interlaced source.
> > >
> > >Rich
> > >
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> > >
> > >
> > >
> > >
> > 
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> 
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