# Unsupported audio: ISO/IEC 11172-3, MPEG-1 Audio Layer II **URL:** \ **Category:** Archived\ **Tags:** roku-developer-program\ **Created:** [February 3, 2012, 2:30am UTC](https://forum.developer.roku.com/t/unsupported-audio-iso-iec-11172-3-mpeg-1-audio-layer-ii/1733 "2012-02-03T02:30:21Z")\ **Posts on this page:** 7\ **Page:** 1
**Author:** ![elduran](https://avatars.discourse-cdn.com/v4/letter/e/f0a364/32.png) [@elduran](https://forum.developer.roku.com/u/elduran)\ **Post date:** [February 3, 2012, 2:30am UTC](https://forum.developer.roku.com/t/unsupported-audio-iso-iec-11172-3-mpeg-1-audio-layer-ii/1733/1 "2012-02-03T02:30:21Z")
I am restreaming some channels to watch on my roku 2 (4.2) via HLS, everything works fine, but some doesn’t works, i get this error from the debug console: showHomeScreen | msg = Stream started. | index = 0 Unexpected event type: 20 showHomeScreen | msg = Unsupported audio: ISO/IEC 11172-3, MPEG-1 Audio Layer II | index = 0 Video status: 0 0 showHomeScreen | msg = | index = -5 Video request failure: -5 4 showHomeScreen | msg = | index = 0 Screen closed The only difference i found on the streams is: Streams with AAC audio plays fine Streams with MPEG Audio Layer 1/2/3 (mpga) doesn’t works on my roku2, plays fine on OSX, and iPhone, but not on my roku MP3 Is supposed to works fine on roku 2, why is not working on mine? Thanks ---
**Author:** ![RokuJoel](https://avatars.discourse-cdn.com/v4/letter/r/e95f7d/32.png) [@RokuJoel](https://forum.developer.roku.com/u/RokuJoel)\ **Post date:** [February 3, 2012, 2:39am UTC](https://forum.developer.roku.com/t/unsupported-audio-iso-iec-11172-3-mpeg-1-audio-layer-ii/1733/2 "2012-02-03T02:39:02Z")
Can you PM me some example streams that don’t work? MP3 does sometimes work on Roku2, however, we don’t officially support mp3 audio, please read the Encoding Guide pdf in your SDK. - Joel ---
**Author:** ![Anonymous1](https://avatars.discourse-cdn.com/v4/letter/a/77aa72/32.png) [@Anonymous1](https://forum.developer.roku.com/u/Anonymous1)\ **Post date:** [February 3, 2012, 6:17pm UTC](https://forum.developer.roku.com/t/unsupported-audio-iso-iec-11172-3-mpeg-1-audio-layer-ii/1733/3 "2012-02-03T18:17:23Z")
For video, we support AAC or DD soundtracks, mp3 may work, but mp2 as shown is not supported and I don’t know of plans to support it. For audio we support MP3, not MP2 as shown here. ---
**Author:** ![elduran](https://avatars.discourse-cdn.com/v4/letter/e/f0a364/32.png) [@elduran](https://forum.developer.roku.com/u/elduran)\ **Post date:** [February 3, 2012, 8:04pm UTC](https://forum.developer.roku.com/t/unsupported-audio-iso-iec-11172-3-mpeg-1-audio-layer-ii/1733/4 "2012-02-03T20:04:22Z")
The audio of the stream is mp3, if i use rtmpdump i get mp3, if i open the stream in VLC i get mpeg 1/2/3 (mpga), and if i run the stream in roku i get the message from the topic ---
**Author:** ![bosborne](https://avatars.discourse-cdn.com/v4/letter/b/f04885/32.png) [@bosborne](https://forum.developer.roku.com/u/bosborne)\ **Post date:** [March 5, 2013, 3:45pm UTC](https://forum.developer.roku.com/t/unsupported-audio-iso-iec-11172-3-mpeg-1-audio-layer-ii/1733/5 "2013-03-05T15:45:18Z")
I have the same issue. Roku is incorrectly identifying the audio in my HLS live stream as ISO/IEC 11172-3, MPEG-1 Audio Layer II. I’m using an FMLE publishing RTMP to Wowza to produce the HLS stream. The audio on the Roku is set to MP3. I can also play this stream in iOS devices and QuickTime on Mac. When downloading the playlist itself, it reports the video as avc1.66.31, and the audio as mp4a.40.34. Looking at the table no this page: [http://developer.apple.com/library/ios/ … tions.html](http://developer.apple.com/library/ios/#documentation/networkinginternet/conceptual/streamingmediaguide/FrequentlyAskedQuestions/FrequentlyAskedQuestions.html), you can see that it corresponds with mp3 audio. ---
**Author:** ![OddScott](https://avatars.discourse-cdn.com/v4/letter/o/7993a0/32.png) [@OddScott](https://forum.developer.roku.com/u/OddScott)\ **Post date:** [March 5, 2013, 9:44pm UTC](https://forum.developer.roku.com/t/unsupported-audio-iso-iec-11172-3-mpeg-1-audio-layer-ii/1733/6 "2013-03-05T21:44:30Z")
The PC version of FMLE needs the $180 MainConcept ([http://www.mainconcept.com](http://www.mainconcept.com)) AAC Encoder plugin to provide a Roku compatible stream via Wowza (or any other HLS transcoder I would guess). Apparently the Mac version of FMLE already has an AAC encoder included. ---
**Author:** ![bosborne](https://avatars.discourse-cdn.com/v4/letter/b/f04885/32.png) [@bosborne](https://forum.developer.roku.com/u/bosborne)\ **Post date:** [March 6, 2013, 1:18am UTC](https://forum.developer.roku.com/t/unsupported-audio-iso-iec-11172-3-mpeg-1-audio-layer-ii/1733/7 "2013-03-06T01:18:26Z")
Yes, and I have that version, but was hoping to get MP3 audio working as well.