Added apple subtitle support to mov demuxer (close #2376).

modules/demux/mp4/libmp4.c

@@ -1438,7 +1438,7 @@ static int MP4_ReadBox_sample_tx3g( stream_t *p_stream, MP4_Box_t *p_box )
     MP4_GET2BYTES( p_box->data.p_sample_text->i_text_box_right );
 
 #ifdef MP4_VERBOSE
-    msg_Dbg( p_stream, "read box: \"text\" in stsd text" );
+    msg_Dbg( p_stream, "read box: \"tx3g\" in stsd text" );
 #endif
     MP4_READBOX_EXIT( 1 );
 }
@@ -2446,6 +2446,7 @@ static int MP4_ReadBox_default( stream_t *p_stream, MP4_Box_t *p_box )
             case FOURCC_text:
                 return MP4_ReadBox_sample_text( p_stream, p_box );
             case FOURCC_tx3g:
+            case FOURCC_sbtl:
                 return MP4_ReadBox_sample_tx3g( p_stream, p_box );
             default:
                 msg_Warn( p_stream,

modules/demux/mp4/libmp4.h

@@ -187,6 +187,7 @@
 #define FOURCC_text VLC_FOURCC( 't', 'e', 'x', 't' )
 #define FOURCC_tx3g VLC_FOURCC( 't', 'x', '3', 'g' )
 #define FOURCC_subp VLC_FOURCC( 's', 'u', 'b', 'p' )
+#define FOURCC_sbtl VLC_FOURCC( 's', 'b', 't', 'l' )
 
 #define FOURCC_0xa9nam VLC_FOURCC( 0xa9, 'n', 'a', 'm' )
 #define FOURCC_0xa9aut VLC_FOURCC( 0xa9, 'a', 'u', 't' )

modules/demux/mp4/mp4.c

@@ -2124,6 +2124,7 @@ static void MP4_TrackCreate( demux_t *p_demux, mp4_track_t *p_track,
         case( FOURCC_text ):
         case( FOURCC_subp ):
         case( FOURCC_tx3g ):
+        case( FOURCC_sbtl ):
             p_track->fmt.i_cat = SPU_ES;
             break;