1 files changed, 5 insertions, 0 deletions
diff --git a/libavcodec/ansi.c b/libavcodec/ansi.c
index c2a1d83974..861d4e57e4 100644
--- a/libavcodec/ansi.c
+++ b/libavcodec/ansi.c
@@ -325,6 +325,11 @@ static int decode_frame(AVCodecContext *avctx,
         av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
         return ret;
     }
+    if (!avctx->frame_number) {
+        memset(s->frame.data[0], 0, avctx->height * FFABS(s->frame.linesize[0]));
+        memset(s->frame.data[1], 0, AVPALETTE_SIZE);
+    }
+
     s->frame.pict_type           = AV_PICTURE_TYPE_I;
     s->frame.palette_has_changed = 1;
     memcpy(s->frame.data[1], ff_cga_palette, 16 * 4);