[FFmpeg-devel] [PATCH] Add an usage example for extracting images from a video in the docs

Stefano Sabatini stefano.sabatini-lala
Tue Aug 12 12:06:42 CEST 2008


On date Tuesday 2008-08-12 09:44:42 +0200, Diego Biurrun encoded:
> On Tue, Aug 12, 2008 at 09:40:04AM +0200, Stefano Sabatini wrote:
> > 
> > --- doc/ffmpeg-doc.texi	(revision 14695)
> > +++ doc/ffmpeg-doc.texi	(working copy)
> > @@ -140,6 +140,25 @@
> >  
> > +* You can extract images from a video:
> > +
> > + at example
> > +ffmpeg -i foo.avi -r 1 -s WxH -f image2 foo-%03d.jpeg 
> > + at end example
> > +
> > +This will extract one video frame per second from the video and will
> > +output them in files named like @file{foo-001.jpeg}, @file{foo-002.jpeg},
> 
> s/like//
> 
> > +etc. Images will be rescaled to fit the new WxH values.
> > +
> > +The syntax @code{foo-%03d.jpeg} specifies to use a decimal number
> > +composed of three digits padded with zeroes to express the sequence
> > +number. It is the same format supported by the C printf function, but
> > +only formats accepting a normal integer are suitable.
> > +
> > +If you want to extract just a limited number of frames, you can use the
> > +above command in combination with the -vframes or -t option, or in
> > +combination with -ss to extract starting from a certain point in time.
> 
> start extracting
> 
> Patch looks OK to me otherwise, commit anytime.

Fixed and applied, regards.
-- 
FFmpeg = Faboulous and Faboulous Merciless Portentous Exploitable Gadget




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