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Sparse notes on A/V Resources management.
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* Default dir for A/V files is /var/fenice/avroot.
* Default RTSP port is 1554.

* For every A/V resource you need
  
  1) two separate files for audio (MP3) and video (MPEG-1,2),
  2) a Source Description (.sd) file for resource description.
  
  Streming clients must be invoked with, e.g:
  	
	$ mystreamingclient rtsp://streamingserver:1554/myvideo.sd

  or similar. You can't request plain mpeg or mp3 files, neither for audio-only
  nor video-only resources.  
  
  See test files in avroot dir for examples.

* You can do live mp3-coded streaming using a named-pipe:

  1) Create a named-pipe (e.g., mkfifo live.mp3),
  2) create an .sd file with the named-pipe as audio content, then
  3) feed named-pipe with live-encoded mp3 data.

* Suggested encoding tools:
  Video: mjpegtools' mpeg2enc
  Audio: lame