From 3750e36aa8ecb53764e5549470a39cd14ff6b513 Mon Sep 17 00:00:00 2001
From: Paul B Mahol <onemda@gmail.com>
Date: Sat, 8 Feb 2020 21:54:09 +0100
Subject: [PATCH] avfilter/vf_alphamerge: add AVClass to private context

---
 libavfilter/vf_alphamerge.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/libavfilter/vf_alphamerge.c b/libavfilter/vf_alphamerge.c
index 72b93c780f..85b6d9b61a 100644
--- a/libavfilter/vf_alphamerge.c
+++ b/libavfilter/vf_alphamerge.c
@@ -38,6 +38,8 @@
 enum { Y, U, V, A };
 
 typedef struct AlphaMergeContext {
+    const AVClass *class;
+
     int is_packed_rgb;
     uint8_t rgba_map[4];
     AVFrame *main_frame;