From b80c486fb3b5d324a03a2e9fb532d639b2258e1f Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Cl=C3=A9ment=20B=C5=93sch?= <u@pkh.me>
Date: Sun, 15 Mar 2015 19:09:16 +0100
Subject: [PATCH] avfilter/palettegen: make sure at least one frame was sent to
 the filter

Fix FPE.

(cherry picked from commit 84da9339c21f679836a024ce86a69c6ea4a6fd11)
---
 libavfilter/vf_palettegen.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/libavfilter/vf_palettegen.c b/libavfilter/vf_palettegen.c
index 8b08140283..4b49058b35 100644
--- a/libavfilter/vf_palettegen.c
+++ b/libavfilter/vf_palettegen.c
@@ -504,7 +504,7 @@ static int request_frame(AVFilterLink *outlink)
     int r;
 
     r = ff_request_frame(inlink);
-    if (r == AVERROR_EOF && !s->palette_pushed) {
+    if (r == AVERROR_EOF && !s->palette_pushed && s->nb_refs) {
         r = ff_filter_frame(outlink, get_palette_frame(ctx));
         s->palette_pushed = 1;
         return r;