[FFmpeg-devel] [PATCH] avcodec/pngdec: apng: fix buffer index when no blending is needed.

[Benoit Fouet]

---
 libavcodec/pngdec.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/libavcodec/pngdec.c b/libavcodec/pngdec.c
index a96667f..0ba2749 100644
--- a/libavcodec/pngdec.c
+++ b/libavcodec/pngdec.c
@@ -933,7 +933,11 @@ static int handle_p_frame_apng(AVCodecContext *avctx, PNGDecContext *s,
             pd      += s->image_linesize;
             pd_last += s->image_linesize;
         }
+    } else {
+        pd      += s->cur_h * s->image_linesize;
+        pd_last += s->cur_h * s->image_linesize;
     }
+
     for (j = s->y_offset + s->cur_h; j < s->height; j++) {
         for (i = 0; i < ls; i++)
             pd[i] = pd_last[i];
-- 
2.2.0