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-rw-r--r--libavcodec/mvha.c12
1 files changed, 7 insertions, 5 deletions
diff --git a/libavcodec/mvha.c b/libavcodec/mvha.c
index afe5e511f2..1ea3bb3d76 100644
--- a/libavcodec/mvha.c
+++ b/libavcodec/mvha.c
@@ -256,12 +256,14 @@ static int decode_frame(AVCodecContext *avctx,
dst = frame->data[p] + (avctx->height - 1) * frame->linesize[p];
s->llviddsp.add_left_pred(dst, dst, width, 0);
- dst -= stride;
- lefttop = left = dst[0];
- for (int y = 1; y < avctx->height; y++) {
- s->llviddsp.add_median_pred(dst, dst + stride, dst, width, &left, &lefttop);
- lefttop = left = dst[0];
+ if (avctx->height > 1) {
dst -= stride;
+ lefttop = left = dst[0];
+ for (int y = 1; y < avctx->height; y++) {
+ s->llviddsp.add_median_pred(dst, dst + stride, dst, width, &left, &lefttop);
+ lefttop = left = dst[0];
+ dst -= stride;
+ }
}
}