[MPlayer-users] Scaling and expanding when encoding tv

D Richard Felker III dalias at aerifal.cx
Mon Dec 13 22:47:47 CET 2004

On Mon, Dec 13, 2004 at 12:40:26PM -0800, Barton Bosch wrote:
> RC wrote:
> >On Sat, 11 Dec 2004 16:21:31 -0800
> >Barton Bosch <bartonbosch at SoftHome.net> wrote:
> >
> >
> >>I gather that it is best to keep the w and h dimensions 
> >>divisible by 16 and also in a 4:3 ratio.  Which is more important if 
> >>they are mutually exclusive?
> >
> >
> >Multiples of 16 is much more important.  There's really no reason at
> >all to restrict yourself to a 4/3 aspect ratio.
> Ok thanks, I thought that the 4 filters that rescale to 1.33 on 
> playback might lower quality more than doing it during encoding.
> It seems that I have a functional basic encoding command for my 
> setup.  The next thing to do is to iron out the periodic 
> framedrop/jumpcut every 30 - 60 seconds or so.
> Is this caused by the 29.97 frame rate?  How do you all deal with 
> this?  Would it be better to set the tv card's capture rate to 25 or 
> 27 in the -tv options?  To set the fps to 25 or 27 in -lacvopts?  Or 
> maybe dealing with it on playback with the general mplayer -fps option?

Never set the framerate to anything other than the actual correct
framerate, in this case 30000/1001 aka 29.97. Anything else will give
horrible results.


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