avformat/dump: tag AV_DISPOSITION_DESCRIPTIONS streams

Signed-off-by: NAman Gupta <aman@tmm1.net>

libavformat/dump.c

@@ -547,6 +547,8 @@ static void dump_stream_format(AVFormatContext *ic, int i,
         av_log(NULL, AV_LOG_INFO, " (visual impaired)");
     if (st->disposition & AV_DISPOSITION_CLEAN_EFFECTS)
         av_log(NULL, AV_LOG_INFO, " (clean effects)");
+    if (st->disposition & AV_DISPOSITION_DESCRIPTIONS)
+        av_log(NULL, AV_LOG_INFO, " (descriptions)");
     av_log(NULL, AV_LOG_INFO, "\n");
 
     dump_metadata(NULL, st->metadata, "    ");