Is it possible to export only Audio from a VOD recording?
Hi Davis, are you asking for wowza cloud or wowza streaming engine ?
For cloud , you need to add a new transcoder in advanced tabs
Then select audio only output and save this output 
Note that transcoder operation cost is extra ! You can also split audio video after recording operation ended, run ffmpeg command with -vn parameter ( this will clear the video from the mp4, ie : )
ffmpeg -i sample.mp4 -vn -acodec aac -strict experimental -f mp3 sample.mp3
For wowza streaming engine, in application copy the transcoder template audio only, and disable the Video Codec, then you get the audio only stream in your incoming stream list.
You can disable it through the panel or application.xml
