# Audio codec:G711\_ALAW isCompatible:false

**URL:** <https://community.wowza.com/t/audio-codec-g711-alaw-iscompatible-false/45705>\
**Category:** Wowza Streaming Engine\
**Created:** [July 27, 2015, 2:27pm UTC](https://community.wowza.com/t/audio-codec-g711-alaw-iscompatible-false/45705 "2015-07-27T14:27:39Z")\
**Posts on this page:** 8\
**Page:** 1

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**Author:** ![Nishi\_Ayumi](https://avatars.discourse-cdn.com/v4/letter/n/ea666f/32.png) [@Nishi\_Ayumi](https://community.wowza.com/u/Nishi_Ayumi)\
**Post date:** [July 27, 2015, 2:27pm UTC](https://community.wowza.com/t/audio-codec-g711-alaw-iscompatible-false/45705/1 "2015-07-27T14:27:39Z")

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Hello.

I am trying deliver video with video:H.264,mic:G.711. from flash(as3)

but,wowzastreamingengine\_access.log

LiveStreamPacketizerPacketHandler.handlePacket[liveorigin/_definst_/stream-test]: Audio codec:G711\_ALAW isCompatible:false

can’t Wowza use Microphone codec:G.711？？

Flash code（as3）

var mic:Microphone = Microphone.getMicrophone();

mic.codec=“pcma”;

or

mic.codec=“pcmu”;

It becomes both error…

please tell me,why…

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**Author:** ![sal\_jefferson](https://avatars.discourse-cdn.com/v4/letter/s/6de8d8/32.png) [@sal\_jefferson](https://community.wowza.com/u/sal_jefferson)\
**Post date:** [July 27, 2015, 6:40am UTC](https://community.wowza.com/t/audio-codec-g711-alaw-iscompatible-false/45705/2 "2015-07-27T06:40:13Z")

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You should be able to playback a stream with g.711 audio in Flash RTMP. At present, g.711 is not packetized for RTSP clients and it doesn’t work on HLS or HDS clients.

For RTSP, HLS and HDS clients, you will need to transcode the audio using the Wowza Transcoder using the Audio Only template:

[How to set up and run Wowza Transcoder for live streaming](https://www.wowza.com/docs/how-to-set-up-and-run-wowza-transcoder-for-live-streaming)

Regards,

Salvadore

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**Author:** ![Daren\_Johnson](https://avatars.discourse-cdn.com/v4/letter/d/ee59a6/32.png) [@Daren\_Johnson](https://community.wowza.com/u/Daren_Johnson)\
**Post date:** [July 29, 2015, 10:38pm UTC](https://community.wowza.com/t/audio-codec-g711-alaw-iscompatible-false/45705/3 "2015-07-29T22:38:41Z")

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Hi,

Generally G.711 playback should be possible from a plash player, but it depends on the implementation of G.711.

Wowza Streaming Engine will pass the G.711 through to the player in RTMP streams, but it’s upto the player how

to handle it.

Daren

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<div class="post-metadata">

**Author:** ![Daren\_Johnson](https://avatars.discourse-cdn.com/v4/letter/d/ee59a6/32.png) [@Daren\_Johnson](https://community.wowza.com/u/Daren_Johnson)\
**Post date:** [July 31, 2015, 11:43pm UTC](https://community.wowza.com/t/audio-codec-g711-alaw-iscompatible-false/45705/4 "2015-07-31T23:43:55Z")

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Hi,

Not RTSP streaming for playback yet, but that is coming soon. Right now it should play over RTMP in a flash player for instance.

Daren

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<div class="post-metadata">

**Author:** ![Daren\_Johnson](https://avatars.discourse-cdn.com/v4/letter/d/ee59a6/32.png) [@Daren\_Johnson](https://community.wowza.com/u/Daren_Johnson)\
**Post date:** [August 9, 2015, 9:37pm UTC](https://community.wowza.com/t/audio-codec-g711-alaw-iscompatible-false/45705/5 "2015-08-09T21:37:46Z")

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Hi,

RTSP playback of G.711 (a-law/u-law) has been added in the latest 4.2.0.1 update.

You’ll find the update in the [MyDownloads](https://www.wowza.com/portal/account?tab=downloads) section of your Wowza Portal account.

Daren

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<div class="post-metadata">

**Author:** ![Nishi\_Ayumi](https://avatars.discourse-cdn.com/v4/letter/n/ea666f/32.png) [@Nishi\_Ayumi](https://community.wowza.com/u/Nishi_Ayumi)\
**Post date:** [July 29, 2015, 12:13pm UTC](https://community.wowza.com/t/audio-codec-g711-alaw-iscompatible-false/45705/6 "2015-07-29T12:13:19Z")

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Salvadore

Thank you.

is that not use G.711 in RTSP in wowza?

I am trying this page [https://www.wowza.com/forums/showthread.php?36532-WebRTC-support](https://www.wowza.com/forums/showthread.php?36532-WebRTC-support)

delivered G.711 in RTP?

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<div class="post-metadata">

**Author:** ![Nishi\_Ayumi](https://avatars.discourse-cdn.com/v4/letter/n/ea666f/32.png) [@Nishi\_Ayumi](https://community.wowza.com/u/Nishi_Ayumi)\
**Post date:** [July 31, 2015, 3:14pm UTC](https://community.wowza.com/t/audio-codec-g711-alaw-iscompatible-false/45705/7 "2015-07-31T15:14:29Z")

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Daren

Thank you,

Wowza can publish G.711 on RTSP,but Processing receiver necessity？

I try it.

Regard,Ayumi

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<div class="post-metadata">

**Author:** ![Nishi\_Ayumi](https://avatars.discourse-cdn.com/v4/letter/n/ea666f/32.png) [@Nishi\_Ayumi](https://community.wowza.com/u/Nishi_Ayumi)\
**Post date:** [August 4, 2015, 10:34am UTC](https://community.wowza.com/t/audio-codec-g711-alaw-iscompatible-false/45705/8 "2015-08-04T10:34:57Z")

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Daren

Thank you.

I am trying Camera:H.264　Mic:G.711　Stream　publish on RTSP or RTP,but not yet…

I will wait…

This had as a reference.

[https://www.wowza.com/forums/showthread.php?36532-WebRTC-support/page2](https://www.wowza.com/forums/showthread.php?36532-WebRTC-support/page2)

Regard

Ayumi