From ef09bd65e2c8badc5c5c8d8e842223047f4aa0d1 Mon Sep 17 00:00:00 2001
From: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
Date: Tue, 21 Sep 2021 06:09:26 +0200
Subject: [PATCH] avfilter/vf_blend: Remove always-false format check

This filter uses ff_set_common_formats_from_list().

Reviewed-by: Paul B Mahol <onemda@gmail.com>
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
---
 libavfilter/vf_blend.c | 4 ----
 1 file changed, 4 deletions(-)

diff --git a/libavfilter/vf_blend.c b/libavfilter/vf_blend.c
index 73fdea3c79..47ec1b5a2d 100644
--- a/libavfilter/vf_blend.c
+++ b/libavfilter/vf_blend.c
@@ -821,10 +821,6 @@ static int config_output(AVFilterLink *outlink)
     if (!s->tblend) {
         AVFilterLink *bottomlink = ctx->inputs[BOTTOM];
 
-        if (toplink->format != bottomlink->format) {
-            av_log(ctx, AV_LOG_ERROR, "inputs must be of same pixel format\n");
-            return AVERROR(EINVAL);
-        }
         if (toplink->w != bottomlink->w || toplink->h != bottomlink->h) {
             av_log(ctx, AV_LOG_ERROR, "First input link %s parameters "
                    "(size %dx%d) do not match the corresponding "