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ezstream README
------------------------------
---------------------------------------
WHAT IS IT ?
::::::::::::
ezstream is a command line utility which is a improved version of the old
"shout" utility. It enables you to stream mp3 or vorbis files to an icecast
server without reencoding and thus requires very little CPU. ezstream is
controlled via a XML config file (a few examples are provided in the conf
directory).
ezstream can stream mp3, ogg vorbis, and ogg theora files as well as reading from stdin.
ID3v1 tags are supported in mp3 files and all ogg vorbis tags are propagated
as metadata as well.
ABOUT EZSTREAM
::::::::::::::::
CONFIG FILE
:::::::::::
The following is an example config file :
Ezstream is a command line source client for Icecast media streaming servers,
and the successor of the old "shout" utility.
<ezstream>
<url>http://localhost:8000/testmount.ogg</url>
<sourcepassword>hackme</sourcepassword>
<format>VORBIS</format>
<filename>sunking.ogg</filename>
<svrinfoname>My Stream</svrinfoname>
<svrinfourl>http://www.oddsock.org</svrinfourl>
<svrinfogenre>RockNRoll</svrinfogenre>
<svrinfodescription>This is a stream description</svrinfodescription>
<svrinfobitrate>192</svrinfobitrate>
<svrinfoquality>4.0</svrinfoquality>
<svrinfochannels>2</svrinfochannels>
<svrinfosamplerate>44100</svrinfosamplerate>
<svrinfopublic>1</svrinfopublic>
<reencode>
<enable>0</enable>
</reencode>
</ezstream>
In its basic mode of operation, it streams media files or data from standard
input without reencoding and thus requires only very little CPU resources. It
can also use various external decoders and encoders to reencode from one
format to another, and stream the result to an Icecast server.
URL - this URL specified the location and mountpoint of the icecast server
to which the stream will be sent.
SOURCEPASSWORD - the source password for the icecast server
FORMAT - either MP3, VORBIS or THEORA, This is the output format of your stream.
If you are not reencoding, then this also must be the same format as your
input files.
FILENAME - This can be a single file (in which ezstream will stream that
file over and over continuously) or can be a .m3u file which
is a playlist of files. currently, ezstream will go through
the files sequentially. If you specify "stdin" as the filename
then ezstream will read the input from stdin.
SVRINFONAME - Broadcast name (informational only)
SVRINFOURL - Website associated with the broadcast (informational only)
SVRINFOGENRE - Genre of broadcast (informational only) (used for YP)
SVRINFODESCRIPTION - Description of broadcast (informational only) (used for YP)
SVRINFOBITRATE - Bitrate of broadcast (informational only) (used for YP)
It is YOUR responsibility to ensure that the bitrate specified
here matches up with your input. Note that this info is not
for anything OTHER than YP listing info.
SVRINFOQUALITY - Used only for OggVorbis streams, similar to the bitrate
in that it is used only for informational and YP purposes.
SVRINFOCHANNELS - 1 = MONO, 2 = STEREO (informational only) (used for YP)
SVRINFOSAMPLERATE - (informational only) (used for YP)
SVRINFOPUBLIC - Indicates wether to list this stream in a public YP.
Directly supported media formats are MP3, Ogg Vorbis and Ogg Theora. Metadata
support is available for MP3 (ID3v1 only) and Ogg Vorbis.
REENCODING
Ezstream is free software and licensed under the GNU General Public License.
See the COPYING file for details.
PREREQUISITES
:::::::::::::::
ezstream now support reencoding. This means that your output stream need not
be the same bitrate/samplerate or even format as your input files.
Reencoding is supported via the use of external programs. When you enable reencoding
you need to make sure of a few things :
1. You define a "decoder" for each type of input file.
2. You define a "encoder" for each possible type of output stream.
So if you had a mixture of mp3 and vorbis files in your playlist, you will need to make
sure that a decoder is provided for each type. Ezstream will take the output of the
decoder and send it directly to the specific encoder. All output of the decoder should
be written to stdout and should be in raw form. Most decoder support this mode. Encoders
should all be configured also with raw input and should read it from stdin.
The following decoder/encoders can be used :
For MP3 :
decoder : madplay
encoder : lame
For Vorbis :
decoder : oggdec
encoder : oggenc
For FLAC :
decoder : FLAC
encoder : not yet supported by libshout, and thus not by ezstream.
Additional decoders and encoders may be used, as long as they follow the rules defined above.
The following config file section defines the reencoding parameters :
<reencode>
<enable>1</enable>
<encdec>
<!-- Support for FLAC decoding (input files) -->
<format>FLAC</format> <!-- format = output stream format -->
<match>.flac</match> <!-- match = input file format -->
<decode>flac -s -d --force-raw-format --sign=signed --endian=little @T@ -o -</decode>
<encode>Not supported Yet</encode>
</encdec>
<encdec>
<!-- Support for MP3 decoding via madplay, and encoding via LAME -->
<format>MP3</format>
<match>.mp3</match>
<decode>madplay -o raw:- @T@ 2>/dev/null</decode>
<encode>lame -r -x -b 56 -s 44.1 --resample 22.05 -a - - 2>/dev/null</encode>
</encdec>
<encdec>
<!-- Support for Vorbis decoding via oggdec, and encoding via oggenc -->
<format>VORBIS</format>
<match>.ogg</match>
<decode>oggdec --raw=1 @T@ -o - 2>/dev/null</decode>
<encode>oggenc -Q -r -q 0 --resample=44100 --downmix -t "@M@" -c STREAMER=ezstream -</encode>
</encdec>
</reencode>
Note that the following keywords can be used :
Ezstream depends on:
* libshout 2.2.x (http://www.icecast.org/)
* libshout dependencies, such as libogg, libvorbis, libtheora, etc.
(http://www.vorbis.com/ and http://www.theora.org/)
* libxml 2.x (http://xmlsoft.org/)
@T@ = The fully qualified name of the track being played in the playlist
@M@ = The metadata for the current track
All encoding options (bitrate/samplerate/channels/quality) are set as command line options of
each of the encoders. Each encoder has slightly different options that control these values.
The examples here can be used as a guide, but please make sure you check the manual for each
encoder for the correct encoding options. In all cases, the encoder should be configured to
read RAW audio data from stdin.
INSTALLATION
::::::::::::::
The ezstream software uses the GNU auto-tools to configure, build and install
on a variety of systems. Aside from the standard autoconf options of the
configure script, a couple of additional options are available:
--with-xml-config=PATH use xml-config in PATH to find libxml
--with-ogg=PREFIX Prefix where libogg is installed (optional)
--with-vorbis=PREFIX Prefix where libvorbis is installed (optional)
The compilation and installation process boils down to the usual
$ ./configure --help | less # Skim over the available options
$ ./configure [options] && make && [sudo] make install
# Configure, build and install
# [as root] the software
If this procedure is unfamiliar to you, please consult the INSTALL file for
more detailed instructions.
USAGE
:::::::
Once ezstream is successfully installed, type "man ezstream" (without quotes)
on the command line for a comprehensive manual. This distribution package also
comes with example configuration files that can be used as a guide to configure
ezstream.
Note that all by itself, ezstream is not particularly useful. It requires a
running Icecast server to stream to, which then relays the stream to many
listeners. If this comes as a surprise, browse to http://www.icecast.org/ for
a lot more information, resources, and other source clients.
EXTERNAL DECODERS/ENCODERS
::::::::::::::::::::::::::::
Ezstream should be able to work with any media decoder and encoder that
fulfills the following requirements:
1. It needs to be executable on the command line and not require a graphical
display to function.
2.1. A decoder needs to be capable of sending RAW data to standard output.
2.2. An encoder needs to be capable of reading RAW data from standard input.
2.3. A combined de-/encoder needs to be capable of sending streamable media
to standard output.
Media formats that ezstream does not support directly are passed through
unaltered. Whether they work or not depends on the level of support offered
by the version of libshout ezstream is linked with.
The following incomplete list of programs shows a few that are known to work.
These are also used in the example configuration files:
* MP3
- Decoder: madplay (http://mad.sf.net/)
- Encoder: lame (http://lame.sf.net/)
* Ogg Vorbis:
- Decoder: oggdec
- Encoder: oggenc
Both utilities are in the vorbis-tools package (http://www.vorbis.com/).
* FLAC:
- Decoder: flac (http://flac.sf.net/)
- Encoder: (None. Not supported by libshout at the time of writing, and
thus cannot be used by ezstream.)
* Ogg Theora:
- Decoder/Encoder: ffmpeg2theora (http://v2v.cc/~j/ffmpeg2theora/)