Make sure it is between [1, MAX_THERADS] and also take into account the outlink
size in order not to request zero height output from zscale.
Signed-off-by: Marton Balint <c...@passwd.hu>
---
libavfilter/vf_zscale.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/libavfilter/vf_zscale.c b/libavfilter/vf_zscale.c
index bb457423b3..bab87b0c94 100644
--- a/libavfilter/vf_zscale.c
+++ b/libavfilter/vf_zscale.c
@@ -799,7 +799,7 @@ static int filter_frame(AVFilterLink *link, AVFrame *in)
link->dst->inputs[0]->w = in->width;
link->dst->inputs[0]->h = in->height;
- s->nb_threads = FFMIN(ff_filter_get_nb_threads(ctx), link->h / 8);
+ s->nb_threads = av_clip(FFMIN(ff_filter_get_nb_threads(ctx),
FFMIN(link->h, outlink->h) / 8), 1, MAX_THREADS);
s->in_colorspace = in->colorspace;
s->in_trc = in->color_trc;
s->in_primaries = in->color_primaries;
--
2.31.1
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