[FFmpeg-devel] [PATCH 4/4] Make the crop filter accept parametric expressions.

[Stefano Sabatini]

On date Wednesday 2010-09-08 15:56:27 +0200, Michael Niedermayer encoded:
> On Thu, Jul 22, 2010 at 07:52:35PM +0200, Stefano Sabatini wrote:
[...]
> > diff --git a/libavfilter/vf_crop.c b/libavfilter/vf_crop.c
> > index 6a7ae70..df9b5a2 100644
> > --- a/libavfilter/vf_crop.c
> > +++ b/libavfilter/vf_crop.c
> > @@ -24,7 +24,31 @@
> >   */
> >  
> >  #include "avfilter.h"
> > +#include "libavutil/eval.h"
> >  #include "libavutil/pixdesc.h"
> > +#include "libavutil/avstring.h"
> > +
> > +static const char *var_names[] = {
> > +    "E",
> > +    "PHI",
> > +    "PI",
> > +    "x",
> > +    "y",
> > +    "w",      ///< width  of the input video
> > +    "h",      ///< height of the input video
> 
> t for timestamp in seconds
> f for frame number

This will be only possible for x and y, as w and h cannot (yet) be
dynamically changed.

> otherwise the patch looks ok

Regards.
-- 
FFmpeg = Fancy and Faithless Most Powerful EniGma