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.\"     Title: sydra-launch
.\"    Author: [see the "AUTHORS" section]
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.\"      Date: 10/08/2014
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.\"    Source: \ \&
.\"  Language: English
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.TH "SYDRA\-LAUNCH" "8" "10/08/2014" "\ \&" "\ \&"
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.SH "NAME"
sydra-launch \- tool to start gst\-launch style pipelines
.SH "SYNOPSIS"
.sp
.nf
sydra\-launch
  [ \fB\-h|\-\-help\fR ]
  [ \fB\-D|\-\-nodaemonize\fR ]
  [ \fB\-u|\-\-username\fR <username> ]
  [ \fB\-g|\-\-groupname\fR <groupname> ]
  [ \fB\-C|\-\-chroot\fR <path> ]
  [ \fB\-P|\-\-write\-pid\fR <filename> ]
  [ \fB\-L|\-\-log\fR <target>:<level>[,<param1>[,<param2>[\&.\&.]]] ]
  [ \fB\-U|\-\-debug\fR ]
  [ \fB\-n|\-\-appname\fR <name> ]
  [ \fB\-p|\-\-pipeline\fR <pipeline description> ]
.fi
.SH "DESCRIPTION"
.sp
\fBsydra\fR is a toolbox which allows you to set up multiple bidirectional Video/Audio streams from external locations\&. \fBsydra\fR has been written to be used for the Elevate Festival in Graz Austria in order to involve external locations to present themselves at the festival\&.
.sp
This manpage describes \fBsydra\-launch\fR which is basically a gst\-launch equivalent\&. The utility creates and runs a gstreamer pipeline which is configured through command line arguments\&. The syntax for the pipeline description is the same as for gst\-launch\&. The sole purpose of this program is that it allows to set the app\-name which will get used for example by xvimagesink to set the window title\&. This is needed for sydra to tell a tiling window manager where a window should be shown\&.
.SH "OPTIONS"
.sp
The following options can be passed to the \fBsydra\-launch\fR daemon:
.sp
\fBglobal options\fR
.PP
\fB\-D, \-\-nodaemonize\fR
.RS 4
This option instructs
\fBsydra\-launch\fR
to run in foreground instead of becoming a daemon which is the default\&.
.RE
.PP
\fB\-u, \-\-username <username>\fR
.RS 4
run as this user\&. If no group is specified (\fB\-g\fR) the default group of the user is used\&. The default is to not drop privileges\&.
.RE
.PP
\fB\-g, \-\-groupname <groupname>\fR
.RS 4
run as this group\&. If no username is specified (\fB\-u\fR) this gets ignored\&. The default is to not drop privileges\&.
.RE
.PP
\fB\-C, \-\-chroot <path>\fR
.RS 4
Instruct
\fBsydra\-launch\fR
to run in a chroot jail\&. The default is to not run in chroot\&.
.RE
.PP
\fB\-P, \-\-write\-pid <filename>\fR
.RS 4
Instruct
\fBsydra\-launch\fR
to write it\(cqs pid to this file\&. The default is to not create a pid file\&.
.RE
.PP
\fB\-L, \-\-log <target>:<level>[,<param1>[,<param2>[\&.\&.]]]\fR
.RS 4
add log target to logging system\&. This can be invoked several times in order to log to different targets at the same time\&. Every target has its own log level which is a number between 0 and 5\&. Where 0 means disabling log and 5 means debug messages are enabled\&.

The file target can be used more than once with different levels\&. If no target is provided at the command line a single target with the config
\fBsyslog:3,sydra\-launch,daemon\fR
is added\&.

The following targets are supported:
.PP
\fBsyslog\fR
.RS 4
log to syslog daemon, parameters <level>[,<logname>[,<facility>]]
.RE
.PP
\fBfile\fR
.RS 4
log to file, parameters <level>[,<path>]
.RE
.PP
\fBstdout\fR
.RS 4
log to standard output, parameters <level>
.RE
.PP
\fBstderr\fR
.RS 4
log to standard error, parameters <level>
.RE
.RE
.PP
\fB\-U, \-\-debug\fR
.RS 4
This option instructs
\fBsydra\-launch\fR
to run in debug mode\&. It implicits
\fB\-D\fR
(don\(cqt daemonize) and adds a log target with the configuration
\fBstdout:5\fR
(logging with maximum level)\&. In future releases there might be additional output when this option is supplied\&.
.RE
.PP
\fB\-n, \-\-appname <name>\fR
.RS 4
This set the application name using
\fIg_set_prgname()\fR\&. It will be used for example by xvimagesink for window title\&.
.RE
.PP
\fB\-p, \-\-pipeline <pipeline description>\fR
.RS 4
A gst\-launch\-style description for the pipeline to get started\&. This uses the same syntax as gst\-launch\&. Example:
\fIvideotestsrc ! video/x\-raw,format=I420,width=864,height=480 ! xvimagesink\fR
.RE
.SH "BUGS"
.sp
Most likely there are some bugs in \fBsydra\-launch\fR\&. If you find a bug, please let the developers know at equinox@spreadspace\&.org\&. Of course, patches are preferred\&.
.SH "SEE ALSO"
.sp
\fBgst\-launch\fR(1)
.SH "AUTHORS"
.sp
Christian Pointner <equinox@spreadspace\&.org>
.SH "COPYING"
.sp
Copyright (C) 2014 Christian Pointner\&. This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or any later version\&.