git-svn-id: https://casparcg.svn.sourceforge.net/svnroot/casparcg/server/branches...

diff --git a/core/mixer/audio/audio_mixer.cpp b/core/mixer/audio/audio_mixer.cpp
index ed6af65a9c5948de920497d2afe6b863cec7b88a..e0e9e06aa32ec9295ff824f9b0766bbc39ec792c 100644 (file)
--- a/core/mixer/audio/audio_mixer.cpp
+++ b/core/mixer/audio/audio_mixer.cpp
@@ -48,7 +48,7 @@ public:
 \r
        void visit(const core::write_frame& frame)\r
        {\r
-               if(!transform_stack_.top().get_has_audio())\r
+               if(!transform_stack_.top().get_has_audio() || frame.audio_data().empty())\r
                        return;\r
 \r
                const auto& audio_data = frame.audio_data();\r