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-rw-r--r--libavformat/oggparsetheora.c9
1 files changed, 7 insertions, 2 deletions
diff --git a/libavformat/oggparsetheora.c b/libavformat/oggparsetheora.c
index df7a89c09d..632c4ef521 100644
--- a/libavformat/oggparsetheora.c
+++ b/libavformat/oggparsetheora.c
@@ -131,8 +131,13 @@ theora_gptopts(AVFormatContext *ctx, int idx, uint64_t gp, int64_t *dts)
struct ogg *ogg = ctx->priv_data;
struct ogg_stream *os = ogg->streams + idx;
struct theora_params *thp = os->private;
- uint64_t iframe = gp >> thp->gpshift;
- uint64_t pframe = gp & thp->gpmask;
+ uint64_t iframe, pframe;
+
+ if (!thp)
+ return AV_NOPTS_VALUE;
+
+ iframe = gp >> thp->gpshift;
+ pframe = gp & thp->gpmask;
if (thp->version < 0x030201)
iframe++;