On Sat, Apr 04, 2015 at 11:42:34AM +0200, Clément Bœsch wrote:
> On Mon, Mar 30, 2015 at 09:57:35PM +0200, Michael Niedermayer wrote:
> > Signed-off-by: Michael Niedermayer <michae...@gmx.at>
> > ---
> > libavfilter/vf_vignette.c | 9 +++++++--
> > 1 file changed, 7 insertions(+), 2 deletions(-)
> >
> > diff --git a/libavfilter/vf_vignette.c b/libavfilter/vf_vignette.c
> > index 806bd72..9a05651 100644
> > --- a/libavfilter/vf_vignette.c
> > +++ b/libavfilter/vf_vignette.c
> > @@ -161,15 +161,20 @@ static void update_context(VignetteContext *s,
> > AVFilterLink *inlink, AVFrame *fr
> > s->var_values[VAR_T] = TS2T(frame->pts, inlink->time_base);
> > s->var_values[VAR_PTS] = TS2D(frame->pts);
> > } else {
> > - s->var_values[VAR_N] = 0;
> > + s->var_values[VAR_N] = NAN;
>
> Why?if some code uses VAR_N, the value depends on the current frame number so its not constant and per frame evaluation is needed or am i missing something ? [...] -- Michael GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB Awnsering whenever a program halts or runs forever is On a turing machine, in general impossible (turings halting problem). On any real computer, always possible as a real computer has a finite number of states N, and will either halt in less than N cycles or never halt.
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