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-rw-r--r--src/lib/util.h4
1 files changed, 2 insertions, 2 deletions
diff --git a/src/lib/util.h b/src/lib/util.h
index 28a6fd660..91ce4b443 100644
--- a/src/lib/util.h
+++ b/src/lib/util.h
@@ -63,8 +63,8 @@ namespace dcp {
#define MAX_KDM_SIZE (256 * 1024)
/** Number of lines that closed caption viewers will display */
#define CLOSED_CAPTION_LINES 3
-/** Maximum line length of closed caption viewers */
-#define CLOSED_CAPTION_LENGTH 30
+/** Maximum line length of closed caption viewers, according to SMPTE Bv2.1 */
+#define CLOSED_CAPTION_LENGTH 32
extern std::string program_name;
extern bool is_batch_converter;