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-rw-r--r--src/lib/ffmpeg_subtitle_stream.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/src/lib/ffmpeg_subtitle_stream.h b/src/lib/ffmpeg_subtitle_stream.h
index 064c72f8d..85c4df889 100644
--- a/src/lib/ffmpeg_subtitle_stream.h
+++ b/src/lib/ffmpeg_subtitle_stream.h
@@ -38,5 +38,7 @@ public:
std::map<RGBA, RGBA> colours () const;
private:
+ /** mutex to protect _colours as it can be set from the "examine FFMpeg subtitles" job thread */
+ mutable boost::mutex _mutex;
std::map<RGBA, RGBA> _colours;
};