1 files changed, 40 insertions, 0 deletions
diff --git a/contrib/ffmpeg/A01-encoding-tool-tag.patch b/contrib/ffmpeg/A01-encoding-tool-tag.patch
new file mode 100644
index 000000000..8a9301150
--- /dev/null
+++ b/contrib/ffmpeg/A01-encoding-tool-tag.patch
@@ -0,0 +1,40 @@
+diff --git a/libavformat/matroskaenc.c b/libavformat/matroskaenc.c
+index cc645a5..3ab3139 100644
+--- a/libavformat/matroskaenc.c
++++ b/libavformat/matroskaenc.c
+@@ -805,7 +805,8 @@ static int mkv_write_tag(AVFormatContext *s, AVDictionary *m, unsigned int eleme
+     end_ebml_master(s->pb, targets);
+ 
+     while ((t = av_dict_get(m, "", t, AV_DICT_IGNORE_SUFFIX)))
+-        if (av_strcasecmp(t->key, "title"))
++        if (av_strcasecmp(t->key, "title") &&
++            av_strcasecmp(t->key, "encoding_tool"))
+             mkv_write_simpletag(s->pb, t);
+ 
+     end_ebml_master(s->pb, tag);
+@@ -965,7 +966,10 @@ static int mkv_write_header(AVFormatContext *s)
+             segment_uid[i] = av_lfg_get(&lfg);
+ 
+         put_ebml_string(pb, MATROSKA_ID_MUXINGAPP , LIBAVFORMAT_IDENT);
+-        put_ebml_string(pb, MATROSKA_ID_WRITINGAPP, LIBAVFORMAT_IDENT);
++        if ((tag = av_dict_get(s->metadata, "encoding_tool", NULL, 0)))
++            put_ebml_string(pb, MATROSKA_ID_WRITINGAPP, tag->value);
++        else
++            put_ebml_string(pb, MATROSKA_ID_WRITINGAPP, LIBAVFORMAT_IDENT);
+         put_ebml_binary(pb, MATROSKA_ID_SEGMENTUID, segment_uid, 16);
+     }
+ 
+diff --git a/libavformat/movenc.c b/libavformat/movenc.c
+index 43a1647..5bc0ca3 100644
+--- a/libavformat/movenc.c
++++ b/libavformat/movenc.c
+@@ -1858,7 +1858,8 @@ static int mov_write_ilst_tag(AVIOContext *pb, MOVMuxContext *mov,
+     mov_write_string_metadata(s, pb, "\251wrt", "composer" , 1);
+     mov_write_string_metadata(s, pb, "\251alb", "album"    , 1);
+     mov_write_string_metadata(s, pb, "\251day", "date"     , 1);
+-    mov_write_string_tag(pb, "\251too", LIBAVFORMAT_IDENT, 0, 1);
++    if (!mov_write_string_metadata(s, pb, "\251too", "encoding_tool", 1))
++        mov_write_string_tag(pb, "\251too", LIBAVFORMAT_IDENT, 0, 1);
+     mov_write_string_metadata(s, pb, "\251cmt", "comment"  , 1);
+     mov_write_string_metadata(s, pb, "\251gen", "genre"    , 1);
+     mov_write_string_metadata(s, pb, "\251cpy", "copyright", 1);