From 568b7b2777231cc0be823f270a916f951dcbf0a8 Mon Sep 17 00:00:00 2001
From: Paul B Mahol
Date: Sun, 23 Aug 2020 15:05:24 +0200
Subject: avcodec/gif: fix disposal method for first frame and transparent gifs

Fixes #7902
---
 libavcodec/gif.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/libavcodec/gif.c b/libavcodec/gif.c
index e92dfa65d7..65a76cfde4 100644
--- a/libavcodec/gif.c
+++ b/libavcodec/gif.c
@@ -267,7 +267,7 @@ static int gif_image_write_image(AVCodecContext *avctx,
     int bcid = -1, honor_transparency = (s->flags & GF_TRANSDIFF) && s->last_frame && !palette;
     const uint8_t *ptr;
 
-    if (!s->image && avctx->frame_number && is_image_translucent(avctx, buf, linesize)) {
+    if (!s->image && is_image_translucent(avctx, buf, linesize)) {
         gif_crop_translucent(avctx, buf, linesize, &width, &height, &x_start, &y_start);
         honor_transparency = 0;
         disposal = GCE_DISPOSAL_BACKGROUND;
-- 
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