ffmpeg | branch: master | Paul B Mahol <one...@gmail.com> | Tue Aug 11 10:55:16 
2020 +0200| [4dbb75c437117285cfa195c437a8a1ee898e9293] | committer: Paul B Mahol

avfilter/vf_xfade: check that fps between inputs are valid

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=4dbb75c437117285cfa195c437a8a1ee898e9293
---

 libavfilter/vf_xfade.c | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/libavfilter/vf_xfade.c b/libavfilter/vf_xfade.c
index 6467838ad1..724be2f419 100644
--- a/libavfilter/vf_xfade.c
+++ b/libavfilter/vf_xfade.c
@@ -1411,6 +1411,22 @@ static int config_output(AVFilterLink *outlink)
         return AVERROR(EINVAL);
     }
 
+    if (!inlink0->frame_rate.num || !inlink0->frame_rate.den) {
+        av_log(ctx, AV_LOG_ERROR, "The inputs needs to be a constant frame 
rate; "
+               "current rate of %d/%d is invalid\n", inlink0->frame_rate.num, 
inlink0->frame_rate.den);
+        return AVERROR(EINVAL);
+    }
+
+    if (inlink0->frame_rate.num != inlink1->frame_rate.num ||
+        inlink0->frame_rate.den != inlink1->frame_rate.den) {
+        av_log(ctx, AV_LOG_ERROR, "First input link %s frame rate "
+               "(%d/%d) do not match the corresponding "
+               "second input link %s frame rate (%d/%d)\n",
+               ctx->input_pads[0].name, inlink0->frame_rate.num, 
inlink0->frame_rate.den,
+               ctx->input_pads[1].name, inlink1->frame_rate.num, 
inlink1->frame_rate.den);
+        return AVERROR(EINVAL);
+    }
+
     outlink->w = inlink0->w;
     outlink->h = inlink0->h;
     outlink->time_base = inlink0->time_base;

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