[MPlayer-users] disagreement between mplayer displayed timecode and -ss flag

[Giacomo Comes]

You need to use -ss 4:25
4 minutes 25 seconds = 265 seconds

Giacomo

On Mon, Aug 30, 2004 at 11:32:03AM -0700, Dean S. Messing wrote:
> 
> Running mplayer-1.0-0.pre5.3plf
> 
> I'm trying to extract a small swath of frames from the _Titanic_ DVD
> in order to test some video processing algorithms.  I find the
> approximate beginning of where I want to extract by viewig the DVD and
> watching the "V: xxx.x" timecodes go by on the text output of the
> commandline:
> 
>      mplayer dvd://1  -nosound  -monitoraspect 16:9 
> 
> I find that what I want starts at about "V: 265.0"
> 
> But when I then do 
> 
> 
> mplayer dvd://1  -nosound  -ss 265 -frames 200 -monitoraspect 16:9 
> 
> what gets played is somewhere around 435 seconds.
> 
> By cut and try I found that -ss 175 starts playing at 265.
> 
> Near the beginning of the film (first minute or so) there is not much
> discrepancy.  Then it seems to jump to something pretty big after
> couple minutes.
> 
> Any ideas on what is happening?  Maybe it has something to do with
> switching between telecine and no telecine within the movie.  But I've
> tried using -fps 29.970 to inhibit the auto-switching and it does not
> solve the problem
> 
> Dean S. Messing
> Display Algorithms & Visual Optimization Lab
> Information Systems Technologies Dept.
> Sharp Laboratories of America
> 
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