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Thread: TS to TS transcode

  1. #1
    Join Date
    Dec 2011
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    28

    Default TS to TS transcode

    Hi,

    I would like to transcode or transrate MPEG-TS streams into MPEG-TS streams, the only part that will be changed will then be either codec itself (MPEG2 to H264) or bitrate. The result should then be a MPEG-TS stream. Is it possible with Wowza Transcoder and how to set it up ?

    Thanks

    Jerome

  2. #2
    Join Date
    Dec 2007
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    21,962

    Default

    Jerome,

    You can use this addon along with the Wowza Transcoder:

    http://www.wowza.com/forums/content....m-to-multicast

    The last example in the package readme.html:
    # Incoming stream myStream will be published as MPEG-TS to address:
    # 239.1.0.1:10000
    myStream={name:myStream,stream:239.1.0.1:10000,isRTPWrapped:false}
    The input to Wowza Transcoder is your MPEG-TS stream, the input to Multicast Publish is Wowza transrated stream. The package publishes mpeg-ts stream unicast o

    Richard

  3. #3
    Join Date
    Dec 2011
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    28

    Default

    Richard,

    big thank for your answer.
    I did not precise my will but as you understood my incoming streams are multicast and I want to regenerate multicast as well.
    Why is it mandatory to use a RTSP client to be able to play the resulting stream then ?

    Thanks

    Jerome

  4. #4
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    Default

    Jerome,

    You can playback the output of the Wowza Transcoder in any client supported by Wowza, no need to involve this addon. The mpeg-ts stream published by Wowza with transcoder source has to be played back in VLC or Quicktime.

    Richard

  5. #5
    Join Date
    Dec 2011
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    28

    Default

    Richard,

    many thanks.

    Jerome

  6. #6
    Join Date
    Dec 2011
    Posts
    28

    Default Multicast to multicast

    Hi Richard,

    coming back to our discussion, can you precisely confirm if it is possible to generate a multicast stream with a multicast stream source that has been passed through WoWza transcoder ?

    Here are the steps :

    source : MPE2-TS multicast stream
    => WoWza transcoder to generate H264
    => WoWza server to generate H264 TS-encapsulated multicast stream

    Is this right ? Is there another way to manage this ?

    Thanks

    Jérôme

  7. #7
    Join Date
    Dec 2007
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    21,962

    Default

    Jérôme,

    Yes, each of those things can be done in Wowza, and in that order, assuming the source video codec and audio codec are supported for decode

    Video decoding: H.264, MPEG2, MPEG4 Part 2
    Audio decoding: AAC, MP3, MPEG 1 Part 1/2, Speex, G.711 (a-law and mu-law)
    http://www.wowza.com/forums/content....wza-Transcoder


    Richard

  8. #8
    Join Date
    Dec 2011
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    28

    Default

    Richard,

    I went through the tutorial and the manuals but I do not see how to concretely output a multicast stream, the only reference to MPEG-TS is when using the TS Wrapper :

    <Property>
    <Name>forceMPEGTSOut</Name>
    <Value>true</Value>
    <Type>Boolean</Type>
    </Property>
    <Property>
    <Name>rtpWrapMPEGTS</Name>
    <Value>true</Value>
    <Type>Boolean</Type>
    </Property>

    and it is not mentionned a multicast IP address or how to play the output generated stream.

    Thanks

    Jérôme

  9. #9
    Join Date
    Dec 2007
    Posts
    21,962

    Default

    Jérôme,

    You just need MulticastPublish Addon:

    http://www.wowza.com/forums/content....m-to-multicast

    Test playback locally with VLC.

    Richard

  10. #10
    Join Date
    Dec 2011
    Posts
    28

    Default

    Richard,

    I am currently testing multicast publish add-on.

    I would like to set up a multicast output like this one ("multicastmap.txt" file) :

    myStream={name:myStream,stream:225.1.1.1:10000,ttl:63,isRTPWrapped:false}

    but the add-on does not take these parameters, instead it takes the ones from "Applications.xml" file. (I try to open the result with VLC and it displays nothing although it reads something).

    I don't know how to make it working passing thourgh "multicastmap.txt" parameters. In the multicast publish add-on manual it is said :

    "When a new stream is started, the multicast publish module will search for the stream name in this map file. If there is a match the stream will used the define multicast destination address or addresses."

    So how to make the matching ?

    Thanks

    Jérôme

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