[MPlayer-users] show interlaced/progressive info..

[D Richard Felker III]

On Mon, Nov 24, 2003 at 10:53:09PM +0200, Pasi Kärkkäinen wrote:
> [Automatic answer: RTFM (read DOCS, FAQ), also read DOCS/bugreports.html]
> On Thu, Nov 13, 2003 at 11:23:19AM +0200, Tuukka Toivonen wrote:
> > [Automatic answer: RTFM (read DOCS, FAQ), also read DOCS/bugreports.html]
> > On Wed, 12 Nov 2003, Pasi Kärkkäinen wrote:
> > 
> > >It would be nice if mplayer would print if the input video is interlaced or
> > >progressive.. or is there already some option that does this (I couldn't
> > >find).
> > 
> > The problem is that for non-moving images it is impossible to say
> > whether the image is interlaced or not. For moving images its easier
> > but you can never be sure, you can at most say that at xx % probability
> > it's interlaced.
> > 
> > So there really isn't an algoritmic way to find out whether a movie is
> > interlaced or not. Of course it would be possible to do some probability
> > estimation... just send the patch ;)
> > 
> 
> Yes, I understand it's very difficult to determine if the *video* is
> interlaced or not.. 
> 
> I meant that mplayer would print if the input stream consists of fields..
> for example mpeg2 can be interlaced or progressive..
> 
> also at least dv avi is interlaced usually.. while mpeg1 and mpeg4
> (divx/xvid) is usually progressive.

This information is rarely useful. There are field-encoded DVDs with
progressive content (idiotic waste of bits...) and progressive DV
cameras, and at the same time, interlaced or telecined video is often
frame-encoded on DVDs.

Rich