Wowza Live Audio Video Mixing


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Wowza doesn’t do transcoding. So, we highly recommend to use FOSS solutions

Where we need Wowza Live Audio Video Mixing?

1) Live event is broadcasting through Wowza
2) We need a multi lingual setup somewhere and comment or transcode that live event with voice.
3) Flash client might receive the stream where
Output Video Stream = Video of live event + Audio transcoder (multi lingual human voice)

Modern IP cameras provide RTP/RTSP/RTMP with MPEG, MPEG4 or h.264 encoded stream for broadcasting through Wowza.

We might need a RTP/RTSP/RTMP client to decoder and manipulate streams then re-encode stream and serve it over standard protocol like RTP/RTSP/RTMP.

Best Solution should use Xuggler to serve streams to Flash. Media Server might be Wowza or Red5.

Xuggler is the easy way to uncompress, modify, and re-compress any media file (or stream) from Java.

Xuggler in Action: A free open-source library for Java developers to uncompress, manipulate, and compress recorded or live video in real time.

 

Mixing audio and video with ffmpeg

Mixing audio with video file without audio track
# ffmpeg -i audio-file.mp3 -i video-file.avi -acodec copy -vcodec copy output-file.avi

Mixing audio with video file with existing audio track.
# ffmpeg -i audio-file.mp3 -i video-with-audio.avi -acodec copy -vcodec copy output-file.avi -map 0.0 -map 1.0

-map -> the output file would contain two streams audio and video.

Contact us for Live Audio Video Mixing.

Email: svnlabs[at]gmail.com
Skype: svnlabs
MSN: svnlabs[at]hotmail.com