From 5edda724105a3aff58d099407a775be1a1b4aea1 Mon Sep 17 00:00:00 2001
From: Carl Hetherington <cth@carlh.net>
Date: Fri, 20 Nov 2020 21:19:04 +0100
Subject: [PATCH] Don't try to set empty languages on CCAP tracks.

---
 src/lib/reel_writer.cc | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/lib/reel_writer.cc b/src/lib/reel_writer.cc
index fa84180f0..16b34d785 100644
--- a/src/lib/reel_writer.cc
+++ b/src/lib/reel_writer.cc
@@ -708,7 +708,7 @@ ReelWriter::write (PlayerText subs, TextType type, optional<DCPTextTrack> track,
 			s->set_metadata (mxf_metadata());
 			if (type == TEXT_OPEN_SUBTITLE && !lang.empty()) {
 				s->set_language (lang.front());
-			} else {
+			} else if (track && !track->language.empty()) {
 				s->set_language (dcp::LanguageTag(track->language));
 			}
 			s->set_edit_rate (dcp::Fraction (_film->video_frame_rate (), 1));
-- 
2.30.2