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README

Rotter
=======
Nicholas J. Humfrey <njh@aelius.com>

For the latest version of Rotter, please see:
http://www.aelius.com/njh/rotter/


What is Rotter ?
----------------

Rotter is a Recording of Transmission / Audio Logger for JACK. It was 
designed for use by radio stations, who are legally required to keep 
a recording of all their output. Rotter runs continuously, writing to 
a new file every hour. 


Rotter can output files in two different strutures, either all files in a 
single directory or create a directory structure:

flat: /root_directory/YYYY-MM-DD-HH.suffix
hierarchy: /root_directory/YYYY/MM/DD/HH/archive.suffix
combo: /root_directory/YYYY/MM/DD/HH/YYYY-MM-DD-HH.suffix
dailydir: /root_directory/YYYY-MM-DD/YYYY-MM-DD-HH.suffix

The advantage of using a folder hierarchy is that you can store related 
files in the hour's directory.


Usage
-----

rotter [options] <root_directory>
   -a            Automatically connect JACK ports
   -f <format>   Format of recording (see list below)
   -b <bitrate>  Bitrate of recording (bitstream formats only)
   -c <channels> Number of channels
   -n <name>     Name for this JACK client
   -N <filename> Name for archive files (default 'archive')
   -d <hours>    Delete files in directory older than this
   -R <secs>     Length of the ring buffer (in seconds)
   -L <layout>   File layout (default 'hierarchy')
   -j            Don't automatically start jackd
   -v            Enable verbose mode
   -q            Enable quiet mode

Supported file layouts:
   flat          /root_directory/YYYY-MM-DD-HH.suffix
   hierarchy     /root_directory/YYYY/MM/DD/HH/archive.suffix
   combo         /root_directory/YYYY/MM/DD/HH/YYYY-MM-DD-HH.suffix

Supported audio output formats:
   mp3           MPEG Audio Layer 3   [Default]
   mp2           MPEG Audio Layer 2
   aiff          AIFF (Apple/SGI 16 bit PCM)
   aiff32        AIFF (Apple/SGI 32 bit float)
   au            AU (Sun/Next 16 bit PCM)
   au32          AU (Sun/Next 32 bit float)
   caf           CAF (Apple 16 bit PCM)
   caf32         CAF (Apple 32 bit float)
   flac          FLAC 16 bit
   vorbis        Ogg Vorbis
   wav           WAV (Microsoft 16 bit PCM)
   wav32         WAV (Microsoft 32 bit float)


Example:
rotter -a -f mp3 -d 1000 -b 128 -v /var/achives
[DEBUG]  Wed Jun 21 22:54:19 2006  Root directory: /var/archives
[INFO]   Wed Jun 21 22:54:19 2006  JACK client registered as 'rotter'.
[DEBUG]  Wed Jun 21 22:54:19 2006  Size of the ring buffers is 2.00 seconds (352800 bytes).
[INFO]   Wed Jun 21 22:54:19 2006  Encoding using liblame version 3.96.1.
[DEBUG]  Wed Jun 21 22:54:19 2006    Input: 44100 Hz, 2 channels
[DEBUG]  Wed Jun 21 22:54:19 2006    Output: MPEG-1 Layer 3, 160 kbps, Joint Stereo
[INFO]   Wed Jun 21 22:54:19 2006  Connecting 'alsa_pcm:capture_1' to 'rotter:left'
[INFO]   Wed Jun 21 22:54:19 2006  Connecting 'alsa_pcm:capture_2' to 'rotter:right'
[INFO]   Wed Jun 21 22:54:19 2006  Starting new archive file: /var/archives/2006/06/21/22/archive.mp3
[DEBUG]  Wed Jun 21 22:54:19 2006  Opening MPEG Audio output file: /var/archives/2006/06/21/22/archive.mp3
[INFO]   Wed Jun 21 23:00:00 2006  Starting new archive file: /var/archives/2006/06/21/23/archive.mp3
[DEBUG]  Wed Jun 21 23:00:00 2006  Closing MPEG Audio output file.
[DEBUG]  Wed Jun 21 23:00:00 2006  Opening MPEG Audio output file: /var/archives/2006/06/21/23/archive.mp3

Start logging audio to hourly files in /var/archives.
Rotter will automatically connect itself to the first two JACK output ports 
it finds and encode to MPEG Layer 3 audio at 128kbps. Each hour it will 
delete files older than 1000 hours (42 days). Verbose mode means it will 
display more informational messages.

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