# No Audio recorded from Flash in FLV **URL:** \ **Category:** Wowza Streaming Engine\ **Created:** [December 25, 2012, 1:10pm UTC](https://community.wowza.com/t/no-audio-recorded-from-flash-in-flv/39722 "2012-12-25T13:10:20Z")\ **Posts on this page:** 4\ **Page:** 1
**Author:** ![Derek\_Yadgaroff](https://avatars.discourse-cdn.com/v4/letter/d/4da419/32.png) [@Derek\_Yadgaroff](https://community.wowza.com/u/Derek_Yadgaroff)\ **Post date:** [December 25, 2012, 1:10pm UTC](https://community.wowza.com/t/no-audio-recorded-from-flash-in-flv/39722/1 "2012-12-25T13:10:20Z")
Title Publishing a NetStream w/attached Camera and Microphone to a Wowza server, recorded FLV does not contain any audio. Description Problem Description: When publishing a NetStream with attached Camera and Microphone to a Wowza server, the recorded FLV does not contain any audio. Steps to Reproduce: - Camera Settings cam = Camera.getCamera(name); cam.setMode(1920,1080,30); aspectRatio = 4/3; cam.setMode(aspectRatio\*400,400,30); cam.setQuality(0,100); - NetStream Settings setProfileLevel(H264Profile.MAIN, H264Level.LEVEL\_3); setQuality(0, 100); cam.setMode(cam.width, cam.height, cam.fps); - Microphone Settings public var codec:String = SoundCodec.SPEEX; public var enableVAD:Boolean = true; public var encodeQuality:int = 10; public var framesPerPacket:int = 1; public var silenceLevel:int = 0; public var silenceTimeout:int = 500; public var useEchoSuppression:Boolean = true; public var enhancedOptions:MicrophoneEnhancedOptions = new MicrophoneEnhancedOptions(); Actual Result: Can play recorded FLV with video only. Expected Result: Can play recorded FLV with video only and audio. Any Workarounds: Before publishing the stream, call mic.setLoopBack(true); mic.setLoopBack(false); Test Configuration My Hardware and Environment details: Mac Air Mountain Lion App Language(s) English OS Language(s) English Platform(s) MAC OS 10.7 (Lion) Browser(s) Firefox 4.0 ---
**Author:** ![Richard\_Lanham](https://avatars.discourse-cdn.com/v4/letter/r/c68b51/32.png) [@Richard\_Lanham](https://community.wowza.com/u/Richard_Lanham)\ **Post date:** [December 26, 2012, 3:17pm UTC](https://community.wowza.com/t/no-audio-recorded-from-flash-in-flv/39722/2 "2012-12-26T15:17:14Z")
Take a look at the startCamera and publish methods in [this example](https://www.wowza.com/docs/how-to-convert-flash-player-11-output-from-h-264-speex-audio-to-h-264-aac-audio-using-wowza-transcoder) ```auto private function startCamera():void { // get the default Flash camera and microphone camera = Camera.getCamera(); microphone = Microphone.getMicrophone(); // here are all the quality and performance settings that we suggest camera.setMode(320, 240, 30, false); camera.setQuality(0, 90); camera.setKeyFrameInterval(60); microphone.rate = 11; microphone.setSilenceLevel(0); microphone.rate = 11; microphone.codec = SoundCodec.SPEEX; microphone.encodeQuality = 5; microphone.framesPerPacket = 2; subscribeName.text = "testing_ios"; publishName.text = "testing"; } private function publish(event:MouseEvent):void { if (doPublish.label == 'Publish') { // create a new NetStream object for video publishing nsPublish = new NetStream(nc); var h264Settings:H264VideoStreamSettings = new H264VideoStreamSettings(); //H264VideoStreamSettings = new H264VideoStreamSettings(); h264Settings.setProfileLevel(H264Profile.BASELINE,H264Level.LEVEL_3); nsPublish.videoStreamSettings = h264Settings; nsPublish.addEventListener(NetStatusEvent.NET_STATUS, nsPublishOnStatus); // set the buffer time to zero since it is chat nsPublish.bufferTime = 0; // publish the stream by name nsPublish.publish(publishName.text); // add custom metadata to the stream var metaData:Object = new Object(); metaData["description"] = "Chat using VideoChat example." nsPublish.send("@setDataFrame", "onMetaData", metaData); // attach the camera and microphone to the server nsPublish.attachCamera(camera); nsPublish.attachAudio(microphone); doPublish.label = 'Stop'; } else { // here we are shutting down the connection to the server nsPublish.attachCamera(null); nsPublish.attachAudio(null); nsPublish.publish("null"); nsPublish.close(); doPublish.label = 'Publish'; } } ``` Richard ---
**Author:** ![Chris\_Danzig](https://avatars.discourse-cdn.com/v4/letter/c/22d042/32.png) [@Chris\_Danzig](https://community.wowza.com/u/Chris_Danzig)\ **Post date:** [May 10, 2013, 3:56pm UTC](https://community.wowza.com/t/no-audio-recorded-from-flash-in-flv/39722/3 "2013-05-10T15:56:52Z")
Hey Richard, Did you ever find a solution to this issue? I am having the same problem. Any help you could provide would be a life-saver. -Chris > Title > > Publishing a NetStream w/attached Camera and Microphone to a Wowza server, recorded FLV does not contain any audio. > > Description > > Problem Description: > > When publishing a NetStream with attached Camera and Microphone to a Wowza server, the recorded FLV does not contain any audio. > > Steps to Reproduce: > > - Camera Settings > > cam = Camera.getCamera(name); > > cam.setMode(1920,1080,30); > > aspectRatio = 4/3; > > cam.setMode(aspectRatio\*400,400,30); > > cam.setQuality(0,100); > > - NetStream Settings > > setProfileLevel(H264Profile.MAIN, H264Level.LEVEL\_3); > > setQuality(0, 100); > > cam.setMode(cam.width, cam.height, cam.fps); > > - Microphone Settings > > public var codec:String = SoundCodec.SPEEX; > > public var enableVAD:Boolean = true; > > public var encodeQuality:int = 10; > > public var framesPerPacket:int = 1; > > public var silenceLevel:int = 0; > > public var silenceTimeout:int = 500; > > public var useEchoSuppression:Boolean = true; > > public var enhancedOptions:MicrophoneEnhancedOptions = new MicrophoneEnhancedOptions(); > > Actual Result: > > Can play recorded FLV with video only. > > Expected Result: > > Can play recorded FLV with video only and audio. > > Any Workarounds: > > Before publishing the stream, call > > mic.setLoopBack(true); > > mic.setLoopBack(false); > > Test Configuration > > My Hardware and Environment details: > > Mac Air Mountain Lion > > App Language(s) English > > OS Language(s) English > > Platform(s) MAC OS 10.7 (Lion) > > Browser(s) Firefox 4.0 ---
**Author:** ![Richard\_Lanham](https://avatars.discourse-cdn.com/v4/letter/r/c68b51/32.png) [@Richard\_Lanham](https://community.wowza.com/u/Richard_Lanham)\ **Post date:** [May 11, 2013, 11:50am UTC](https://community.wowza.com/t/no-audio-recorded-from-flash-in-flv/39722/4 "2013-05-11T11:50:03Z")
Try adding “cupertinostreamingpacketizer” to the Application.xml /LiveStreamPacketizers. Then test recording again. Then look at the access log, find where the stream was published (x-event “publish”) and take a look at the packetization messages. There is a ton of info about the video and audio codec. You will see if there was any audio and if so, details about the encoding. Richard