Missing FFmpeg include; fixes #989.

diff --git a/src/lib/audio_filter_graph.cc b/src/lib/audio_filter_graph.cc
index 744fdb2b7213d9dfbb0b21964939af543bc383bb..afbcf4921e9dde165e04914c81777697229cf275 100644 (file)
--- a/src/lib/audio_filter_graph.cc
+++ b/src/lib/audio_filter_graph.cc
@@ -24,6 +24,7 @@
 extern "C" {
 #include <libavfilter/buffersink.h>
 #include <libavfilter/buffersrc.h>
+#include <libavutil/channel_layout.h>
 }
 
 #include "i18n.h"