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.\" ========================================================================
.\"
.IX Title "VBIPLAY 1"
.TH VBIPLAY 1 " " "vbiplay (C) 2002 Tom Zoerner" "VBI playback tool"
.SH "NAME"
vbiplay \- Playback of recorded EPG teletext packets
.SH "SYNOPSIS"
.IX Header "SYNOPSIS"
\&\fBvbiplay\fR
.SH "DESCRIPTION"
.IX Header "DESCRIPTION"
\&\fBvbiplay\fR allows to play back a series of teletext packets received
on a designated \s-1EPG\s0 page, even in regions of the world where the \s-1EPG\s0
provider normally can not be received.  It can connect to \fInxtvepg\fR
and transfer the data into it's \s-1VBI\s0 input buffer as if they had been
received life on air (however with a much higher data rate).
It's a small tool that's intended for debugging \s-1EPG\s0 reception problems
or decoding errors.
.SH "USAGE"
.IX Header "USAGE"
\&\fBvbiplay\fR takes the the place of a \s-1TV\s0 application in the communication
with \fInxtvepg\fR, i.e. no \s-1TV\s0 application (which supports \s-1EPG\s0 interaction)
must be running at the same time or the tool will immediately exit
with an error message.
.PP
\&\fBvbiplay\fR opens a file named \fIttx.dat\fR which must be previously
generated by \fBvbirec\fR.  If \fInxtvepg\fR isn't already running, the program
waits until it is attached.  As soon as nxtvepg is attached and acquisition
is enabled, playback starts.  It's recommended to check the reception
by nxtvepg in the \fIView acq statistics\fR window, which can be opened in
the Control menu.
.PP
The teletext packets are played back as fast as possible.  However since
nxtvepg only polls the teletext buffer once every second (which is enough
for regular Nextview transmissions) and the buffer holds a maximum of
512 packets, the maximum data rate is limited to shortly above 20 pages
per second, i.e. apx. 20 times the normal data rate.
.SH "FILES"
.IX Header "FILES"
.IP "\fBttx.dat\fR" 4
.IX Item "ttx.dat"
This is the fixed name of the input file.
It must be generated by \fBvbirec\fR.
.SH "SEE ALSO"
.IX Header "SEE ALSO"
See also the manuals for \fBvbirec\fR and \fBnxtvepg\fR.
.SH "AUTHOR"
.IX Header "AUTHOR"
Th. \*(L"Tom\*(R" Zoerner, Nuremberg, Germany.
.PP
Email: tomzo (at) users (dot) sourceforge (dot) net
.SH "COPYRIGHT"
.IX Header "COPYRIGHT"
Copyright (C) 2002 by Th. Zoerner.
All rights reserved.
.PP
This program is free software; you can redistribute it and/or modify
it under the terms of the \s-1GNU\s0 General Public License Version 2 as
published by the Free Software Foundation, e.g. at
http://www.fsf.org/
.PP
This program is distributed in the hope that it will be useful, but
\&\fB\s-1WITHOUT\s0 \s-1ANY\s0 \s-1WARRANTY\s0\fR; without even the implied warranty of
merchantability or fitness for a particular purpose. See the
file \fI\s-1COPYRIGHT\s0\fR for more details.