X-Git-Url: https://main.carlh.net/gitweb/?p=libdcp.git;a=blobdiff_plain;f=src%2Fsmpte_subtitle_asset.cc;h=11450ef3192cf0368fc045423bd30d28132ae252;hp=d0fbc0eb1ea140720c91e844a50d4d99df0fd203;hb=dd672d926e3b88cbe42b0778fda397d9e858b592;hpb=a6a1294944d4ce02cbb429ca1aec07ca78d79a88

diff --git a/src/smpte_subtitle_asset.cc b/src/smpte_subtitle_asset.cc
index d0fbc0eb..11450ef3 100644
--- a/src/smpte_subtitle_asset.cc
+++ b/src/smpte_subtitle_asset.cc
@@ -347,7 +347,8 @@ SMPTESubtitleAsset::xml_as_string () const
 	root->set_namespace_declaration (subtitle_smpte_ns, "dcst");
 	root->set_namespace_declaration ("http://www.w3.org/2001/XMLSchema", "xs");
 
-	root->add_child("Id", "dcst")->add_child_text ("urn:uuid:" + _xml_id);
+	DCP_ASSERT (_xml_id);
+	root->add_child("Id", "dcst")->add_child_text ("urn:uuid:" + *_xml_id);
 	root->add_child("ContentTitleText", "dcst")->add_child_text (_content_title_text);
 	if (_annotation_text) {
 		root->add_child("AnnotationText", "dcst")->add_child_text (_annotation_text.get ());
@@ -422,7 +423,8 @@ SMPTESubtitleAsset::write (boost::filesystem::path p) const
 
 	descriptor.NamespaceName = subtitle_smpte_ns;
 	unsigned int c;
-	Kumu::hex2bin (_xml_id.c_str(), descriptor.AssetID, ASDCP::UUIDlen, &c);
+	DCP_ASSERT (_xml_id);
+	Kumu::hex2bin (_xml_id->c_str(), descriptor.AssetID, ASDCP::UUIDlen, &c);
 	DCP_ASSERT (c == Kumu::UUID_Length);
 	descriptor.ContainerDuration = _intrinsic_duration;