[MEncoder-users] hi!

[marco bernich]

thanks!

use avidemux (and openshot) for this type of work.
I just thought it might be an even simpler software ;)

and of course, evrithing in the terminal is more interesting to me.



2012/7/24 Vladimir Mosgalin <mosgalin at vm10124.spb.edu>

> Hi marco bernich!
>
>  On 2012.07.24 at 10:48:42 -0300, marco bernich wrote next:
>
> > use mplayer since I use linux (about 6 years ...) and am trying to edit
> > video with mencoder.
> >
> > but ... I have a problem:
> > I want to make a cut using this syntax:
> >
> > mencoder -ovc copy -oac copy -ss 55 -endpos 10 -o Corte.avi -idx
> > /media/disco/Origen.avi
> >
> >
> > cutting occurs, but not at the exact moment that indicated in '-ss'.
> occurs
> > after a moment...
> >
> > any ideas?
> > thanks and regards
>
> It is impossible to start cut at random position with -ovc copy due to
> keyframes; the first frame from the moment you want (sec 55) requires
> ("references") earlier frames in this stream, so it's impossible to
> start video at it without including earlier frames at all.
>
> You have two solutions: one is to re-encode video in the whole fragment
> (-ovc lavc -lavcopts ..., check manpage and make sure you provide enough
> bitrate), which is probably easier in your case; another (when you need
> long video and don't want to re-encode it completely) is to re-encode
> only first group of frames to solve that keyframe start problem and keep
> rest of the video intact. Avidemux (avidemux.sf.net) is able to do a
> smart cut like that; in fact, it's probably easiest way to do visual cut
> of videos. Also, it's fully supported by developers (unlike mencoder),
> which probably means you have less chances to encounter bug that no one
> would bother to fix.
>
> --
>
> Vladimir
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