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-rw-r--r--libavcodec/mpeg4videodec.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/libavcodec/mpeg4videodec.c b/libavcodec/mpeg4videodec.c
index 82c4f8fc8c..0203503599 100644
--- a/libavcodec/mpeg4videodec.c
+++ b/libavcodec/mpeg4videodec.c
@@ -189,6 +189,10 @@ static int mpeg4_decode_sprite_trajectory(Mpeg4DecContext *ctx, GetBitContext *g
if (w <= 0 || h <= 0)
return AVERROR_INVALIDDATA;
+ /* the decoder was not properly initialized and we cannot continue */
+ if (sprite_trajectory.table == NULL)
+ return AVERROR_INVALIDDATA;
+
for (i = 0; i < ctx->num_sprite_warping_points; i++) {
int length;
int x = 0, y = 0;