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-rw-r--r--gst/qtdemux/qtdemux.c7
1 files changed, 5 insertions, 2 deletions
diff --git a/gst/qtdemux/qtdemux.c b/gst/qtdemux/qtdemux.c
index f6769893..06aae979 100644
--- a/gst/qtdemux/qtdemux.c
+++ b/gst/qtdemux/qtdemux.c
@@ -211,11 +211,14 @@ gst_qtdemux_init (GstQTDemux *qtdemux)
}
static GstCaps*
-quicktime_type_find (GstBuffer *buf,
- gpointer private)
+quicktime_type_find (GstBuffer *buf, gpointer private)
{
gchar *data = GST_BUFFER_DATA (buf);
+ /* we could get a NULL buffer, for example when the input could not be
+ * mmap'd */
+ g_return_val_if_fail (data != NULL, NULL);
+
/* exactly like in the old version */
if (!strncmp (&data[4], "wide", 4) ||
!strncmp (&data[4], "moov", 4) ||