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-rw-r--r--libavfilter/avfilter.c2
-rw-r--r--libavfilter/avfilter.h4
2 files changed, 4 insertions, 2 deletions
diff --git a/libavfilter/avfilter.c b/libavfilter/avfilter.c
index 6ecd4ce4c2..4fbb6bf4a6 100644
--- a/libavfilter/avfilter.c
+++ b/libavfilter/avfilter.c
@@ -70,6 +70,8 @@ AVFilterBufferRef *avfilter_ref_buffer(AVFilterBufferRef *ref, int pmask)
void avfilter_unref_buffer(AVFilterBufferRef *ref)
{
+ if (!ref)
+ return;
if (!(--ref->buf->refcount))
ref->buf->free(ref->buf);
av_free(ref->video);
diff --git a/libavfilter/avfilter.h b/libavfilter/avfilter.h
index a3c51e0b49..5b08941693 100644
--- a/libavfilter/avfilter.h
+++ b/libavfilter/avfilter.h
@@ -28,7 +28,7 @@
#define LIBAVFILTER_VERSION_MAJOR 1
#define LIBAVFILTER_VERSION_MINOR 73
-#define LIBAVFILTER_VERSION_MICRO 1
+#define LIBAVFILTER_VERSION_MICRO 2
#define LIBAVFILTER_VERSION_INT AV_VERSION_INT(LIBAVFILTER_VERSION_MAJOR, \
LIBAVFILTER_VERSION_MINOR, \
@@ -177,7 +177,7 @@ AVFilterBufferRef *avfilter_ref_buffer(AVFilterBufferRef *ref, int pmask);
* Remove a reference to a buffer. If this is the last reference to the
* buffer, the buffer itself is also automatically freed.
*
- * @param ref reference to the buffer
+ * @param ref reference to the buffer, may be NULL
*/
void avfilter_unref_buffer(AVFilterBufferRef *ref);