File ffmpeg-CVE-2020-21041.patch of Package ffmpeg.21291

From 5d9f44da460f781a1604d537d0555b78e29438ba Mon Sep 17 00:00:00 2001
From: Paul B Mahol <onemda@gmail.com>
Date: Sun, 14 Feb 2021 17:20:03 +0100
Subject: [PATCH] avcodec/pngenc: remove monowhite from apng formats

Monowhite pixel format is not supported, and it does not make sense
to add support for it.

Fixes #7989
---
 libavcodec/pngenc.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/libavcodec/pngenc.c b/libavcodec/pngenc.c
index efcae8c494..eebb164440 100644
--- a/libavcodec/pngenc.c
+++ b/libavcodec/pngenc.c
@@ -1174,7 +1174,7 @@ AVCodec ff_apng_encoder = {
         AV_PIX_FMT_PAL8,
         AV_PIX_FMT_GRAY8, AV_PIX_FMT_GRAY8A,
         AV_PIX_FMT_GRAY16BE, AV_PIX_FMT_YA16BE,
-        AV_PIX_FMT_MONOBLACK, AV_PIX_FMT_NONE
+        AV_PIX_FMT_NONE
     },
     .priv_class     = &apngenc_class,
 };
-- 
2.31.1