1 files changed, 15 insertions, 4 deletions
diff --git a/libavformat/utils.c b/libavformat/utils.c
index 66f26ccd6e..aa8a117c23 100644
--- a/libavformat/utils.c
+++ b/libavformat/utils.c
@@ -2234,18 +2234,29 @@ void av_set_program_name(AVProgram *program, char *provider_name, char *name)
     }
 }
 
-int ff_new_chapter(AVFormatContext *s, int64_t start, int64_t end, const char *title)
+int ff_new_chapter(AVFormatContext *s, int id, int64_t start, int64_t end, const char *title)
 {
-    AVChapter *chapter = av_mallocz(sizeof(AVChapter));
+    AVChapter *chapter = NULL;
+    int i;
+
+    for(i=0; i<s->num_chapters; i++)
+        if(s->chapters[i]->id == id)
+            chapter = s->chapters[i];
+
+    if(!chapter){
+        chapter= av_mallocz(sizeof(AVChapter));
     if(!chapter)
         return AVERROR(ENOMEM);
+        dynarray_add(&s->chapters, &s->num_chapters, chapter);
+    }
+    if(chapter->title)
+        av_free(chapter->title);
     if (title)
         chapter->title = av_strdup(title);
+    chapter->id    = id;
     chapter->start = start;
     chapter->end = end;
 
-    dynarray_add(&s->chapters, &s->num_chapters, chapter);
-
     return 0;
 }