Quoting Paul B Mahol (2023-06-14 18:53:52)
> On Wed, Jun 14, 2023 at 6:51 PM Anton Khirnov <an...@khirnov.net> wrote:
>
> > Nothing useful can be done with them currently.
> > ---
> > fftools/ffmpeg_filter.c | 6 ++++++
> > 1 file changed, 6 insertions(+)
> >
> > diff --git a/fftools/ffmpeg_filter.c b/fftools/ffmpeg_filter.c
> > index 4f7565e44e..54c7ed1f5c 100644
> > --- a/fftools/ffmpeg_filter.c
> > +++ b/fftools/ffmpeg_filter.c
> > @@ -845,6 +845,12 @@ FilterGraph *fg_create(char *graph_desc)
> > ofilter->name = describe_filter_link(fg, cur, 0);
> > }
> >
> > + if (!fg->nb_outputs) {
> > + av_log(fg, AV_LOG_FATAL, "A filtergraph has zero outputs, this is
> > not supported\n");
> > + ret = AVERROR(ENOSYS);
> > + goto fail;
> > + }
> > +
> > fail:
> > avfilter_inout_free(&inputs);
> > avfilter_inout_free(&outputs);
> > --
> > 2.40.1
> >
> >
>
> NAK
>
> This is functionality breaking change.
>
Exactly what useful functionality is broken by this?
> And why something that is currently supported should be not supported any
> more.
It is not really supported. The scheduling logic is based around output
streams and cannot work without them.
--
Anton Khirnov
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