According to the new EBML specifications, a string element of length
zero would be read as the default value by a compliant parser.
Signed-off-by: Andreas Rheinhardt <andreas.rheinha...@gmail.com>
---
libavformat/matroskaenc.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/libavformat/matroskaenc.c b/libavformat/matroskaenc.c
index 233c472b8f..786fa41cba 100644
--- a/libavformat/matroskaenc.c
+++ b/libavformat/matroskaenc.c
@@ -1147,7 +1147,7 @@ static int mkv_write_track(AVFormatContext *s,
MatroskaMuxContext *mkv,
put_ebml_string(pb, MATROSKA_ID_TRACKNAME, tag->value);
tag = av_dict_get(st->metadata, "language", NULL, 0);
put_ebml_string(pb, MATROSKA_ID_TRACKLANGUAGE,
- tag && tag->value ? tag->value : "und");
+ tag && tag->value && tag->value[0] ? tag->value : "und");
// The default value for TRACKFLAGDEFAULT is 1, so add element
// if we need to clear it.
--
2.27.0
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