Sunday, October 23, 2011

stream audio via udp on android

In this post, I tried to play small audio data chunks with AudioTrack to show the feasibility of streaming audio. It's not straightforward enough. So I updated the sample code to actually transfer audio data with udp.
As the image below shows, the application is not too complicated.


The two buttons will each create a new thread to send and recv audio data respectively. And the sender will read audio data from the file /data/1.wav. Then, it sends the data to udp port 2048 on localhost. The receiver reads on 2048 port and feed data received to AudioTrack object.
Full code is available at:
http://code.google.com/p/rxwen-blog-stuff/source/browse/trunk/android/streaming_audio/src/rmd/media/StreamingAudio/UdpStream.java
at

21 comments:

  1. AnonymousNovember 16, 2011 at 1:22 PM

    thank you, that's exactly what I was looking for! :)

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  2. n0nameJanuary 2, 2012 at 8:16 PM

    Thanks for good example!
    Is it possible to stream audio over OutputStream(bluetooth transfer capability). I can't find correct way how realize it. If you know tell me please direction =)
    Regards..

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  3. nidzJanuary 3, 2012 at 12:39 AM

    hw do i get full duplex in this??

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  4. UnknownJanuary 4, 2012 at 12:18 PM

    To achieve full duplex, start receiver and sender threads on each peer simultaneously.

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  5. nidzJanuary 23, 2012 at 2:28 PM

    so instead f buttons n on click n dn calling - all i do is call both the func send and receive together rite??

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  6. nidzJanuary 25, 2012 at 1:51 AM

    in dis fr prog 2 run do v need 2 do port forwarding also?? or jus run d code on 2 wifi conn machines ??

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  7. UnknownJanuary 27, 2012 at 3:56 PM

    no need to set up port forwarding if these two devices are in the same lan.

    ReplyDelete
  8. nidzJanuary 27, 2012 at 6:58 PM

    my log cat shows byt_count but d receiving end aint playing d audio i hav sent from my sd card.. so isnt any ip addr required for directing d audio towards d odr end...

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  9. nidzJanuary 27, 2012 at 9:55 PM

    01-27 16:20:24.968: D/UdpStream(345): btnSend clicked
    01-27 16:20:24.987: E/UdpStream(345): start send thread, thread id: 10
    01-27 16:20:24.997: D/UdpStream(345): bytes_count : 800
    01-27 16:20:25.073: D/UdpStream(345): bytes_count : 1600
    01-27 16:20:25.143: D/UdpStream(345): bytes_count : 2400
    01-27 16:20:25.213: D/UdpStream(345): bytes_count : 3200
    01-27 16:20:25.287: D/UdpStream(345): bytes_count : 4000
    01-27 16:20:25.367: D/UdpStream(345): bytes_count : 4800
    01-27 16:20:25.440: D/UdpStream(345): bytes_count : 5600
    01-27 16:20:25.517: D/UdpStream(345): bytes_count : 6400
    01-27 16:20:25.588: D/UdpStream(345): bytes_count : 7200
    01-27 16:20:25.658: D/UdpStream(345): bytes_count : 8000
    01-27 16:20:25.728: D/UdpStream(345): bytes_count : 8800
    01-27 16:20:25.799: D/UdpStream(345): bytes_count : 9600
    01-27 16:20:25.877: D/UdpStream(345): bytes_count : 10400
    dts my log cat in sending side n blank on receivers end!!

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  10. AnonymousMarch 28, 2012 at 8:07 PM

    Could you please contact me on outtrylook@gmail.com
    I tried to contact you but couldn't.

    Anyway,


    I am looking for a player which can play UDP and RTSP stream on android 2.2 platform.

    Could u please help me regarding this?

    Plase respond positively, Crossing my fingers and hoping for the best...

    Thanks

    ReplyDelete
  11. UnknownAugust 6, 2013 at 6:33 PM

    I get a url multicast (udp, rtmp, mms..) (like IPTV)
    Can I stream it on android ?
    Please help.

    ReplyDelete
  12. UnknownAugust 6, 2013 at 6:33 PM

    This comment has been removed by the author.

    ReplyDelete
  13. EdwinJanuary 24, 2014 at 2:11 AM

    Hello,
    I have understood that the audio data is PCM. I can compress the audio before sending via UDP?.

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  14. UnknownJanuary 24, 2014 at 9:51 AM

    Yes, it's definitely possible. Just decode it at the receiving end before play a sample.

    ReplyDelete
  15. AnonymousMarch 19, 2014 at 10:27 AM

    Thank you so much. This works for me locally. However, when I tested it over the internet (using external/public ip) I have to do port forwarding. I am about to distribute the apk for testing purposes and I don't want to require each of them to manually do port forwarding. How can this be done without port forwarding?

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  16. AnonymousJuly 18, 2014 at 6:26 AM

    How can I download the streaming audio project folder and import to my android ADT? thanks!

    ReplyDelete
  17. UnknownSeptember 18, 2014 at 3:03 AM

    how can i send voice stream from one android device to multiple android device via server??can u plz give me any reference or link??

    ReplyDelete
  18. SayuriNovember 18, 2015 at 8:09 PM

    This comment has been removed by the author.

    ReplyDelete
  19. AnonymousNovember 18, 2015 at 8:10 PM

    I am trying on same phone, it just giving me noise.
    I mean started receiving thread and then I started streaming thread.
    It receives packets but only noise is coming not actual audio.
    Please help.

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  20. UnknownNovember 24, 2015 at 11:13 PM

    I cant stop this thread and I dont know why.
    When I send again, it overlap with the previous.
    Can anyone solve my problem?
    Thanks for your help

    ReplyDelete
  21. jordanstyleNovember 11, 2016 at 5:49 AM

    cannot access code.. can you please send me the code thanks

    ReplyDelete