1 files changed, 8 insertions, 0 deletions
diff --git a/libavformat/internal.h b/libavformat/internal.h
index e92f476f50..0e7eb36e32 100644
--- a/libavformat/internal.h
+++ b/libavformat/internal.h
@@ -42,6 +42,14 @@ typedef struct CodecMime{
     enum AVCodecID id;
 } CodecMime;
 
+struct AVFormatInternal {
+    /**
+     * Number of streams relevant for interleaving.
+     * Muxing only.
+     */
+    int nb_interleaved_streams;
+};
+
 void ff_dynarray_add(intptr_t **tab_ptr, int *nb_ptr, intptr_t elem);
 
 #ifdef __GNUC__