diff --git a/src/output/output_dash_mp4.cpp b/src/output/output_dash_mp4.cpp
index 8ccc47cf..79331c3e 100644
--- a/src/output/output_dash_mp4.cpp
+++ b/src/output/output_dash_mp4.cpp
@@ -406,7 +406,7 @@ namespace Mist{
     r << "start=\"PT0S\">" << std::endl;
     if (vidInitTrack){
       DTSC::Track & trackRef = myMeta.tracks[vidInitTrack];
-      r << "    <AdaptationSet mimeType=\"video/mp4\" width=\"" << trackRef.width << "\" height=\"" << trackRef.height << "\" frameRate=\"" << trackRef.fpks / 1000 << "\" segmentAlignment=\"true\" startWithSAP=\"1\" subsegmentAlignment=\"true\" subsegmentStartsWithSAP=\"1\">" << std::endl;
+      r << "    <AdaptationSet group=\"1\" id=\"9998\" mimeType=\"video/mp4\" width=\"" << trackRef.width << "\" height=\"" << trackRef.height << "\" frameRate=\"" << trackRef.fpks / 1000 << "\" segmentAlignment=\"true\" startWithSAP=\"1\" subsegmentAlignment=\"true\" subsegmentStartsWithSAP=\"1\">" << std::endl;
       r << "      <SegmentTemplate timescale=\"1000\" media=\"chunk_$RepresentationID$_$Time$.m4s\" initialization=\"chunk_$RepresentationID$_init.m4s\">" << std::endl;
       r << "        <SegmentTimeline>" << std::endl;
       addSegmentTimeline(r, trackRef, myMeta.live);
@@ -433,7 +433,7 @@ namespace Mist{
     }
     if (audInitTrack){
       DTSC::Track & trackRef = myMeta.tracks[audInitTrack];
-      r << "    <AdaptationSet mimeType=\"audio/mp4\" segmentAlignment=\"true\" startWithSAP=\"1\" subsegmentAlignment=\"true\" subsegmentStartsWithSAP=\"1\" >" << std::endl;
+      r << "    <AdaptationSet group=\"2\" id=\"9999\" mimeType=\"audio/mp4\" segmentAlignment=\"true\" startWithSAP=\"1\" subsegmentAlignment=\"true\" subsegmentStartsWithSAP=\"1\" >" << std::endl;
       r << "      <Role schemeIdUri=\"urn:mpeg:dash:role:2011\" value=\"main\"/>" << std::endl;
       r << "      <SegmentTemplate timescale=\"1000\" media=\"chunk_$RepresentationID$_$Time$.m4s\" initialization=\"chunk_$RepresentationID$_init.m4s\">" << std::endl;