• How to set up a Flash application to publish H.264 video and Speex audio to Wowza Transcoder AddOn

    Steps for transcoding an RTSP, native RTP, or MPEG-TS stream with Wowza Transcoder AddOn.

    1. In Wowza server software, create an application named live.

      1. Set <Streams>/<StreamType> to live.

      2. Set <Streams>/LiveStreamPacketizers> to cupertinostreamingpacketizer, smoothstreamingpacketizer, sanjosestreamingpacketizer,mpegdashstreamingpacketizer.

        Note: You can exclude packetizers that you will not be using. mpegdashstreamingpacketizer is only supported in Wowza Streaming Engine™ software.

      3. Set <Transcoder>/<LiveStreamTranscoder> to transcoder.

      4. Set <Transcoder/<Templates> to transcodeAudio.xml.

      Many IP cameras have h.264 video but an audio codec that's not supported in Flash, iOS, and Silverlight players. Refer to the "Audio (decoding)" list in the Wowza Transcoder AddOn Overview. This template transcodes this kind of carrier.

    2. Create a file named transcodeAudio.xml in the /transcoder/templates folder.

    3. Copy the following XML code into transcodeAudio.xml. It configures a Transcoder template with just one Encode block. The <Video>/<Codec> is set to PassThru and <Video>/<BitRate> is set to ${SourceVideoBitrate}. The <Video>/<Profile> is changed to baseline. The <Audio>/<Codec> is AAC to transcode the unsupported audio codec.
      Code:
      <Root>
      	<Transcode>
      		<Encodes>
      			<Encode>
      				<Enable>true</Enable>
      				<Name>RTP</Name>
      				<StreamName>mp4:${SourceStreamName}_rtp</StreamName>
      				<Video>
      					<!-- H.264, PassThru -->
      					<Codec>PassThru</Codec>
      					<!-- default, CUDA, QuickSync -->
      					<Implementation>default</Implementation>
      					<FrameSize>
      						<!-- letterbox, fit-width, fit-height, crop, stretch, match-source -->
      						<FitMode>fit-height</FitMode>
      						<Width>320</Width>
      						<Height>240</Height>
      					</FrameSize>
      					<Profile>baseline</Profile>
      					<Bitrate>${SourceVideoBitrate}</Bitrate>
      					<KeyFrameInterval>
      						<FollowSource>true</FollowSource>
      						<Interval>60</Interval>
      					</KeyFrameInterval>
      					<Overlays>
      						<Overlay>
      							<Enable>false</Enable>
      							<Index>0</Index>
      							<ImagePath>${com.wowza.wms.context.VHostConfigHome}/content/wowzalogo.png</ImagePath>
      							<Opacity>100</Opacity>
      							<Location>
      								<X>5</X>
      								<Y>5</Y>
      								<Width>${ImageWidth}</Width>
      								<Height>${ImageHeight}</Height>
      								<!-- horiz: left, right, hcenter - vert: top, bottom, vcenter -->
      								<Align>left,top</Align>
      							</Location>
      						</Overlay>
      					</Overlays>
      					<Parameters>
      					</Parameters>
      				</Video>
      				<Audio>
      					<!-- AAC, PassThru -->
      					<Codec>AAC</Codec>
      					<Bitrate>${SourceAudioBitrate}</Bitrate>
      				</Audio>
      				<Properties>
      				</Properties>
      			</Encode>
      		</Encodes>
      		<Decode>
      			<Video>
      				<Deinterlace>false</Deinterlace>
      				<Overlays>
      					<Overlay>
      						<Enable>false</Enable>
      						<Index>0</Index>
      						<ImagePath>${com.wowza.wms.context.VHostConfigHome}/content/wowzalogo.png</ImagePath>
      						<Opacity>100</Opacity>
      						<Location>
      							<X>5</X>
      							<Y>5</Y>
      							<Width>${ImageWidth}</Width>
      							<Height>${ImageHeight}</Height>
      							<!-- horiz: left, right, hcenter - vert: top, bottom, vcenter -->
      							<Align>left,top</Align>
      						</Location>
      					</Overlay>
      				</Overlays>
      				<Parameters>
      				</Parameters>
      			</Video>
      			<Properties>
      			</Properties>
      		</Decode>
      		<Properties>
      		</Properties>
      	</Transcode>
      </Root>
    4. Start the Wowza server in standalone mode (/bin/startup.bat).

    5. Start the RTSP, native RTP, or MPEG-TS stream using Stream Manager with MediaCaster type rtp on application live/_definst_.

      For this example, the stream is camera.stream, a text file that contains the RTSP URL to an IP camera with H.264 video and G.711 audio. You should see the Transcoder start in the console running Wowza server when you start camera.stream in Stream Manager.

    6. Play the stream.

      1. Playback with example Flash RTMP player [install-dir]/examples/LiveVideoStreaming/FlashRTMPPlayer/player.html:

        Server: rtmp://[wowza-ip-address]:1935/live
        Stream: camera.stream_rtp

      2. Playback in iOS device:

        http://[wowza-ip-address]:1935/live/camera.stream_rtp/playlist.m3u8

      3. Playback with Microsoft Silverlight:

        http://[wowza-ip-address]:1935/live/camera.stream_rtp/Manifest

      4. Playback in Adobe Flash OSMF player:

        http://[wowza-ip-address]:1935/live/camera.stream_rtp/manifest.f4m

    Comments 7 Comments
    1. arouaoui.med@hotmail.fr -
      Hi can i transcode th audio format of android "raw_amr" to AAC withe wowza ??
    1. rrlanham -
      No, sorry, it's not on the list:

      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
    1. arouaoui.med@hotmail.fr -
      so we have any solution ?? to stream audio android 1.5-->3.0 with wowza so wat you propose ..?? you think ?? that i can to transcode with a java code and if yes ?? how can i integret him in wowza solution ???
    1. charlie -
      You can try FFmpeg or VLC. Either of these should be able to transcode to AAC.

      Charlie
    1. arouaoui.med@hotmail.fr -
      thks you charlie i will try
    1. arouaoui.med@hotmail.fr -
      hi Charlie im a beginer with ffmpeg and i can't found the command to restream and transcod and publish my audio stream in wowza my audio is encoded in ARM_NB sended by android in 5044 port i wont the command ffmpeg to recive the stream transcod it in AAC and restream to wowza
      i try to recive the stream with an sdp file

      m=audio 5044 RTP/AVP 96
      b=AS:128
      b=RR:0
      a=rtpmap:96 AMR/8000
      a=fmtp:96 octet-align=1
      it is work and i can hear the sound when i lanch with VLC
      i want to do it with ffmpeg
      help me plz
    1. rrlanham -
      For FFmpeg take a look at this article:
      http://www.wowza.com/forums/content....rver-(MPEG-TS)

      But for streaming from mobile, take a look at Livu
      http://www.wowza.com/forums/content....h-Wowza-Server

      Richard