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-rw-r--r--libavcodec/xan.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/libavcodec/xan.c b/libavcodec/xan.c
index f21075c3bf..9e58a77f19 100644
--- a/libavcodec/xan.c
+++ b/libavcodec/xan.c
@@ -224,6 +224,8 @@ static inline void xan_wc3_copy_pixel_run(XanContext *s,
palette_plane = s->current_frame.data[0];
prev_palette_plane = s->last_frame.data[0];
+ if (!prev_palette_plane)
+ prev_palette_plane = palette_plane;
stride = s->current_frame.linesize[0];
line_inc = stride - width;
curframe_index = y * stride + x;