X-Git-Url: https://main.carlh.net/gitweb/?a=blobdiff_plain;f=src%2Flib%2Fencoder.h;h=792029a9164f0ea4ce30054af0496501e113ea49;hb=83416808c0b1ca732e7a186d3811f1ec796fea08;hp=f4116c50c5888172dc3191e79562979fa7178054;hpb=df17bbd25da69fc38eb2dcd8b4a2531cf0bab0bc;p=dcpomatic.git

diff --git a/src/lib/encoder.h b/src/lib/encoder.h
index f4116c50c..792029a91 100644
--- a/src/lib/encoder.h
+++ b/src/lib/encoder.h
@@ -43,7 +43,10 @@ public:
 	virtual void go () = 0;
 
 	/** @return the current frame rate over the last short while */
-	virtual float current_rate () const = 0;
+	virtual boost::optional<float> current_rate () const {
+		return boost::optional<float>();
+	}
+
 	/** @return the number of frames that are done */
 	virtual Frame frames_done () const = 0;
 	virtual bool finishing () const = 0;