lavf/mov: improve `tref/chap` chapter handling

3 parts:
- Supports multiple chapter streams
- Exports regular text chapter streams as opaque data. This prevents consumers
  from showing chapters as if they were regular subtitle streams.
- Exports video chapter streams as thumbnails, and provides the first one as
  an attached_pic.

1 files changed, 2 insertions, 1 deletions

diff --git a/libavformat/isom.h b/libavformat/isom.h
index 2246fed4ef..9038057820 100644
--- a/libavformat/isom.h
+++ b/libavformat/isom.h
@@ -210,7 +210,8 @@ typedef struct MOVContext {
     unsigned trex_count;
     int itunes_metadata;  ///< metadata are itunes style
     int handbrake_version;
-    int chapter_track;
+    int *chapter_tracks;
+    unsigned int nb_chapter_tracks;
     int use_absolute_path;
     int ignore_editlist;
     int ignore_chapters;