avfilter/vf_waveform: abort early if there are no components to show

22d6d916 · Paul B Mahol · d94d2527 · 22d6d916
Commit 22d6d916 authored Oct 24, 2018 by Paul B Mahol
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vf_waveform.c libavfilter/vf_waveform.c +3 -0

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--- a/libavfilter/vf_waveform.c
+++ b/libavfilter/vf_waveform.c
@@ -3025,6 +3025,9 @@ static int config_output(AVFilterLink *outlink)
            comp++;
    }
    s->acomp = comp;
+    if (s->acomp == 0)
+        return AVERROR(EINVAL);
+
    s->odesc = av_pix_fmt_desc_get(outlink->format);
    s->dcomp = s->odesc->nb_components;