Android :: Audio Track Class Streaming Mode

May 18, 2010

I am trying to playback voice data which is received in form of RTP packets in my application. The class
Receiver.java extends thread is playing back the audio. The question is
1. For real time streaming operation how to configure the write(byte[], int offsetInBytes, int sizeInBytes) methods?
2. What is the function and purpose of getPlaybackHeadPosition() What is playback head position kindly explain! Note: The RTP packets I am receiving are not from a traditional Datagram Socket but rather then from Ad Hoc Network so there is unknow delay for receiving the RTP packets. I need to design the Receiver class to play back the voice as soon as packets are recieved. Kindly help me in this regard You received this message because you are subscribed to the Google Groups "Android Developers" group. To post to this group, send email to android-developers@googlegroups.com To unsubscribe from this group, send email to android-developers+ unsubscribe@ google groups.com For more options, visit this group at http://groups.google.com/group/android-developers?hl=en

Android :: Audio Track class Streaming Mode


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Android :: Getting Streaming Audio To Play With Media Player Class?

Jul 21, 2010

I am currently new to android development I been working on the examples in the Dev Guide in the android website. I want to get a stream from a server I have to play in the emulator when I insert the url it doesn't seam to want to play. My question is there a way to get the emulator to play audio or is it all enabled also does MediaPlayer require a special kind of format like mp3 or ogg? his is the code i am running on my 'onCreate()' method.
MediaPlayer mp - new MediaPlayer();
mp.setDataSource(MY_URL_);
mp.prepare();
mp.start()

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Android :: Audio Track Support?

Mar 15, 2010

I like to know on which version of SDK does support 'AudioTrack' class? Does 'AudioTrack' can be used from 1.5 SDK, 1.6 SDK and 2.0 SDK?

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Android :: Audio Track Play Music

Sep 6, 2010

I'm an android starter I tused AudioTrack to play music But it just tell me filenotfoundexeception I try to play mp3 wav ogg (all in raw dir) I've no idea where is wrong? here are my code:

CODE:..................

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Android :: Buffer Size For Audio Track

Jun 17, 2009

This may be impossible but is there any way that I can get a smaller buffer size for AudioTrack than what is provided by getMinBufferSize method?

This is how I am instantiating AudioTrack right now: SR = 44100; bufSize = AudioTrack.getMinBufferSize(SR, AudioFormat.CHANNEL_CONFIGURATION_MONO, AudioFormat.ENCODING_PCM_16BIT); audioTrack = new AudioTrack(AudioManager.STREAM_MUSIC, SR, AudioFormat.CHANNEL_CONFIGURATION_MONO, AudioFormat.ENCODING_PCM_16BIT, bufSize, AudioTrack.MODE_STREAM);

With sample rate of 44100, getMinBufferSize always returns 4800. If I try to make the buffer size smaller than 4800 then I get the following error message: E/AudioTrack( 318): Invalid buffer size: minFrameCount 1200, frameCount 600 E/AudioTrack-JNI( 318): Error initializing AudioTrack E/AudioTrack-Java( 318): [ android.media.AudioTrack ] Error code -20 when initializing AudioTrack. D/AndroidRuntime( 318): Shutting down VM W/dalvikvm( 318): threadid=3: thread exiting with uncaught exception (group=0x4000fe70) E/AndroidRuntime( 318): Uncaught handler: thread main exiting due to uncaught exception I/CheckinService( 59): From server: Intent { action=android.server.checkin.FOTA_CANCEL } E/AndroidRuntime( 318): java.lang.RuntimeException: Unable to start activity Does anyone has any ideas how to over come this problem?

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Android :: Playing Audio From Audio Track In Android

Feb 15, 2010

I want to play music from online mp3 link.I am reading the music data into a stream and trying to play it using audio track.But itz giving only noise.No music i could listen.here buffer is the audio data i am reading into.Same buffer I can play in MediaPlayer,,,But i could not play in audio track.

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Android :: Create Sound Effects Manipulation On Audio Track?

Dec 28, 2009

I am creating an android app that basically records an applies an "Effect" on the audio track then plays it back. I got my app to record an play back but I am stuck an not sure where do go from here. I have been Googling for days now trying to find a open source audio library or some way to change the audio after I record it. I currently have it setup to play back using SoundPool an I't lets me speed up an slow down the audio. I would like to do things like change pitch an add echo etc. I will appreciate any responses because I am totally stumped right now.

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Android :: Audio Streaming From PC To Phone

Aug 26, 2009

I'd like to be able to keep tabs on my dogs while I'm away. Ideally, I picture an app running on my PC that can stream audio to my cell, when I run an app on my cell. Any ideas around this? And there can be monkeys in the middle (PC to webpage to phone).

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Android :: Audio Streaming Integration

Jan 27, 2009

How can I integrate the cupcake audio streaming code into the existing android sdk?

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Android :: Streaming Audio From URL Using MediaPlayer?

Dec 27, 2009

I've been trying to stream mp3's over http using Android's built in MediaPlayer class. The documentation would suggest to me that this should be as easy as :

MediaPlayer mp = new MediaPlayer();
mp.setDataSource(URL_OF_FILE);
mp.prepare();
mp.start();

However I am getting the following repeatedly. I have tried different URLs as well. Please don't tell me that streaming doesn't work on mp3's.

E/PlayerDriver( 31): Command PLAYER_SET_DATA_SOURCE completed with an error or info PVMFErrNotSupported
W/PlayerDriver( 31): PVMFInfoErrorHandlingComplete
E/MediaPlayer( 198): error (1, -4)
E/MediaPlayer( 198): start called in state 0
E/MediaPlayer( 198): error (-38, 0)
E/MediaPlayer( 198): Error (1,-4)
E/MediaPlayer( 198): Error (-38,0)

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Android :: Streaming Audio Over TCP Sockets

May 1, 2010

For my app, I need to record audio from MIC on an Android phone, and send it over TCP to the other android phone, where it needs to be played. I am using AudioRecord and AudioTrack class. This works great with a file - write audio to the file using DataOutputStream, and read from it using DataInputStream. However, if I obtain the same stream from a socket instead of a File, and try writing to it, I get an exception. I am at a loss to understand what could possibly be going wrong.

This is the code:.................

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Android :: Streaming Audio AAC Format

Jun 22, 2010

I have developed a streaming app for Android. My app is streaming AAC audio.The app works fine on 1.5, 1.6, and 2.1. I tested it on Froyo, the android 2.2 and it does not work there.I have try everthing - Streaming directly from server url - Download incrementaly the content, store in a temp file, start reading. - Download incrementaly the content, store in a ContentProvider and start reading.No luck, I always got errors : 06-23 02:47:02.257: ERROR/MediaPlayer(266): Unable to to create media player 06-23 02:47:02.257: INFO/System.out(266): setDataSourceFD failed.: status=0x80000000 Does Froyo support AAC? Anyone happens to stream AAC?

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Android : Does SDK 1.5 Support Audio - Mp3 Streaming

Sep 2, 2009

I am working on a music streaming application and cannot find APIs I can use for it (MediaPlayer supports files only local or HTTP). I have a few questions and would appreciate if someone can help me answering them.

Does Android SDK 1.5 support audio streaming (MP3 stream for example)? If does what API calls I can use? If doesn't what are the plans for future SDK releases that would support streaming? Are there any suggested work arounds until the streaming is supported (like temp files etc)?

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Android :: Update 2.1 Broke Audio Streaming

Jun 30, 2010

I have installed the 2.1 update on my HTC Hero yesterday, and happy as a puppy I instaleld my streaming app... Just to discover that it won't stream decently... It has to stream an mp3 stream and it works on my ADP 1.6 device, on a Samsung Galaxy S test-device (with 2.1) and on the 2.1 emulator...

Logcat is gettign the follwoing errors :

06-30 10:14:18.360: INFO/AudioPolicyService(56): stopOutput(): before lock
06-30 10:14:21.259: DEBUG/dalvikvm(1906): GC freed 28 objects / 1944 bytes in 186ms
06-30 10:14:21.439: INFO/AudioHardwareMSM72XX(56): AudioHardware pcm playback is going to standby.
06-30 10:14:21.439: DEBUG/StreamProcess(56): OutputStreamProcess::ResetAOLC()
06-30 10:14:22.919: INFO/AudioPolicyService(56): startOutput(): before lock
06-30 10:14:22.987: INFO/AudioHardwareMSM72XX(56): AUDIO_START: start kernel pcm_out driver.
06-30 10:14:26.329: DEBUG/dalvikvm(287): GC freed 11 objects / 488 bytes in 268ms
06-30 10:14:47.789: INFO/AudioPolicyService(56): stopOutput(): before lock
06-30 10:14:50.879: INFO/AudioHardwareMSM72XX(56): AudioHardware pcm playback is going to standby.
06-30 10:14:50.879: DEBUG/StreamProcess(56): OutputStreamProcess::ResetAOLC()
06-30 10:14:53.911: INFO/AudioPolicyService(56): startOutput(): before lock
06-30 10:14:54.022: INFO/AudioHardwareMSM72XX(56): AUDIO_START: start kernel pcm_out driver.

The result is a playing player, which stops (pauzes) every 10 seconds, the restarts This will work for about 8-10 restarts and then will simply stop without ever thrwoing an exception or something like that Which makes it somewhat difficult (if not impossible) to catch for us developers So has anyone been experiencing the same problem ? Does anyone have a clue if in this update another OpenCore lib has been used ? Does anyone have any solution ?

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Android :: Audio Only While Streaming Mp4 File To Device

Jul 11, 2010

I 've set Wowza streaming server to stream mp4 videos to Android phones. Android phone can play the RTSP stream successfully but here It only plays audio of the file not the video.

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Android :: Default Streaming Audio Application

Dec 30, 2009

When I pair my sprint htc hero to my car stereo, it always opens the default music player and starts playing a song. Can I prevent this from happening? I generally want to listen to pandora - and not my mp3's. Most annoying part is that the mp3's play simultaneously with pandora until I manually open that music app and pause the music.

There must be a way to either turn off the default action or to plug another program name into that defautl.

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Android :: Streaming Audio To Mobile Phones

May 24, 2010

I'm planning on building an application where audio media is going to be streamed to the mobile phone for the user to listen.The targets are smartphones: iPhone/Blackberry/Android/(J2ME ?).I see that streaming on iPhone has to be done with HTTP Live streaming, but I don't see it supported by other platforms.Should I broadcast the streams via rstp ? http ? Is there any way to use a unified solution for all the different mobile platform ? If anyone already had to go through this, help would be greatly appreciated.

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Android :: How To Play Streaming Audio / Video From URL

Nov 1, 2010

I am new in Android. I am using android os 2.2. I am trying to play streaming audio and video from url. I don't know what to do for that. after 3 days og googling i come to know that I have to use mediaPlayer and MediaController classes.I had use different differend combination of codes found on internet but not succeed.Can anybody guide me what to do for streaming audio/video playing. What about the UI if we use MediaPlayer or Controller class. is there any thing to related these in xml file of layout.if not then even please tell me what may be the code for that.please help me.

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Android : Requires Streaming Of An AAC Audio Stream

Aug 7, 2010

I'm working on an app for a client that requires streaming of an AAC audio stream. Unfortunately, there's nothing I can do about the stream format on the server. I'm working on Android and have discovered that Android's media player does not support raw AAC streams (which is what I'm getting). I found a project on Google Code that supports it (I tested it with the stream) but it's GPL'ed and that doesn't work for my client. I don't have much experience with this sort of thing so forgive me if my ideas aren't great. I know Android can play AAC encoded content if it is in an MP4 wrapper so I had thought about creating an MP4 wrapper on the fly on the client-side or perhaps even just doing some conversion to another format on the fly. Are these reasonable options? Does anybody have better suggestions?

Edit To rephrase, is it possible to put a raw AAC stream from a web server in an MP4 container in real time? If so, does anybody know of resources to help me with the process?

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Android :: Streaming Audio From Computer To Device Via Bluetooth Possible?

May 21, 2010

I want to stream audio directly from my mac via bluetooth to my nexus one. This might sound crazy, but I actually want to be able to control the audio from my mac. I just want to be able to connect an audio jack to my nexus one and let it stream the audio via bluetooth. Is there an app for that?

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Android :: Mediaplayer To Play Live Streaming Audio

Nov 8, 2010

In my music app, i would like to play live streaming like radio broadcasting with mediaplayer as Mediaplayer mp = new Mediaplayer(); mp.setDataSource(LiveStreamingURL); mp.prepare(); mp.start(); but after playing for few seconds it is stopped. I dont know how to overcome it. Give me your suggestions for this.

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Android :: Streaming (live) Video And Audio From Camera Example App?

Mar 23, 2010

Where to get streaming (live) video and audio from camera example for Android? Suppose I want to create some live video streaming service app so I'll have some cool server at the back end. And I know how to do that part. Suppose I have some stand alone app for PCs now I want to go on to mobile devices. So I want to see some sample app grabing audio and video streams from Phone, Synchronizing them, encoding somehow, and sending LIVE stream to server. I need any Open-Source sample that will do this or something like this. Where can I get such one?

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Android :: Possible To Use Media Player To Play Streaming Audio?

Mar 21, 2010

The dev guide suggests this
MediaPlayer mp = new MediaPlayer();
mp.setDataSource(this, Uri.parse("http://wamu-1.streamguys.com:80"));
mp.prepare(); mp.start();
I can't seem to get it working though.
I'm getting "java.io.IOException: Prepare failed.: status=0x1"

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Android :: MediaPlayer Provides Wrong Duration On Audio Streaming

May 27, 2010

I am having the following problem: I am using Android's MediaPlayer to play an mp3 through an HTTP connection. The audio is played correctly, but the MediaPlayer returns an incorrect duration (calling mediaPlayer.getDuration() ). Depending on the mp3 the duration is either shorter or longer. The code that plays the audio is the following:

mediaPlayer = new MediaPlayer(); mediaPlayer.setOnCompletionListener(this); mediaPlayer.setOnErrorListener(this); mediaPlayer.setOnPreparedListener(this); mediaPlayer.setOnBufferingUpdateListener(this); mediaPlayer.setDataSource("a valid URL"); mediaPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC); mediaPlayer.prepareAsync();............................

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Android :: Application - Play Streaming Audio And Video?

Apr 16, 2010

I want to develop a player on Android, which can play streaming audio and video.how should i start about?

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Android :: Recording Amr Audio And Streaming To HTTP Server In Realtime

Jul 6, 2009

AudioRecord can record audio data in pcm format in realtime, but there is no audio-encoder who can encode pcm data to amr format. may be third-party java code can do this, but the performance may be very low.MediaRecorder just record audio data to disk. not realtime.It seems that this is a real miss-impossible?

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Android : Streaming Audio/video Can't Stream A Rtsp File

Aug 25, 2009

I want to stream a media file on web, and android developer website has said that MediaPlayer.setDataSource() can set the data source (file-path or http/rtsp URL) to use. But I got an error in both G1 device and emulator when streaming a rtsp url file: Command PLAYER_PREPARE completed with an error or info PVMFailure error(1, -1). Does anyone know what is this error, or anyone knows where can I get the error description (1, -1) means? the code can work successfully when playing a audio/video file or streaming a http protocal sudio/video file, but can't stream rtsp protocal file. Is android not supported rtsp streaming?

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HTC EVO 4G :: Can't Play Streaming Audio From Web

Sep 19, 2010

My favorite TV and FM stations all have links on there websites for live streaming vidoe/audio. They all have Quicktime or Windows Media links but my Evo will not plahy them. I've tried several Radio apps on the Market but no luck with them either. Is this a planned fix or do I have to go back to to a I-phone or a windows based phone?

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HTC Desire :: Audio Streaming On Bluetooth

May 25, 2010

I can't seem to get my Desire to stream audio on my Parrot MK600 car hands free kit. It pairs and connects, I can make calls over the hands free and it downloads the contact but when I play music from the stock Music app it still comes out over the handset.

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HTC EVO 4G :: Way To Output Streaming Video / Audio To TV?

Jun 27, 2010

I subscribed to JetFlix, in the market. (Jetflicks! TV - Android app on AppBrain) It is a $3 app with a $10/month subscription. I watch it on my phone in my car at the lake during my lunch break. I know that probably sounds sad, but it is AWESOME. I'm a manager in the dang corporate world, and I forget that I am at work by the time I'm done with a movie and come on back to the office. It's my dirty little secret. ANYWAY, there are some great shows available on this application, and I was thinking of replacing my Netflix subscription with it if I could just stream it to my TV at home. I haven't bought an HDMI cable yet, because I don't have a use for one just yet. But is anything "streamable" to the tv? I read that only pictures and videos that were shot with the camera stream though the HDMI cable. If that is the case, what is the point? I keep all that stuff on a hard drive anyway. So my question: can I hook up an HDMI cable and stream Jetflicks to my TV? The Jetflicks movies play on the native Internet browser. So I guess a more accurate question would be: Does the native internet browser display on the TV through the HDMI cable? If so, is there audio?

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