Output MPEG-TS stream identifiers.

with changes by michael to simplify API

libavformat/avformat.h

@@ -606,6 +606,13 @@ typedef struct AVStream {
      */
     int codec_info_nb_frames;
 
+    /**
+     * Stream Identifier
+     * This is the MPEG-TS stream identifier +1
+     * 0 means unknown
+     */
+    int stream_identifier;
+
     /**
      * Stream informations used internally by av_find_stream_info()
      */

libavformat/mpegts.c

@@ -994,6 +994,9 @@ int ff_parse_mpeg2_descriptor(AVFormatContext *fc, AVStream *st, int stream_type
             stream_type == STREAM_TYPE_PRIVATE_DATA)
             mpegts_find_stream_type(st, st->codec->codec_tag, REGD_types);
         break;
+    case 0x52: /* stream identifier descriptor */
+        st->stream_identifier = 1 + get8(pp, desc_end);
+        break;
     default:
         break;
     }