Subs successfully exported with thumbs.

1 files changed, 6 insertions, 2 deletions

diff --git a/src/lib/options.h b/src/lib/options.h
index 39068c24f..2fc5f77ff 100644
--- a/src/lib/options.h
+++ b/src/lib/options.h
@@ -56,11 +56,15 @@ public:
 	 *  @param t true to return a temporary file path, otherwise a permanent one.
 	 *  @return The path to write this video frame to.
 	 */
-	std::string frame_out_path (int f, bool t) const {
+	std::string frame_out_path (int f, bool t, std::string e = "") const {
+		if (e.empty ()) {
+			e = _frame_out_extension;
+		}
+		
 		std::stringstream s;
 		s << _frame_out_path << "/";
 		s.width (8);
-		s << std::setfill('0') << f << _frame_out_extension;
+		s << std::setfill('0') << f << e;
 
 		if (t) {
 			s << ".tmp";