record_session for sdr, wrtp
This note describes
record_session, a Perl
script designed for use with Unix sdr and the
wrtp record/playback tool.
Andrew Daviel, TRIUMF, November 1997
Purpose:
To be able to start an wrtp recording script from sdr, and
to use sdr to announce a playback session so that users may
use sdr's conflict-avoidance algorithm to choose addresses and ports
and sdr's tool-launching ability to play the recordings.
Usage:
To record a session:
In sdr, from the Session Information menu, click "Record".
In the Record Session menu, check "now", enter a filename prefix,
and click "Record". For immediate recording,
append " record" to the filename prefix, e.g. "/usr/joe/Radio record".
Otherwise, execute the resulting record script "Radio.record".
A conference name is created from the title.
To play a session:
In sdr, create a new session in the normal way.
Then select the session and proceed as for recording.
For immediate playback, append " play" to the filename prefix.
Execute the resulting playback script.
The playback script takes two optional arguments; a conference name
and an offset in seconds. The conference name defaults to
one derived from the title; the offset defaults to zero.
Playing CERN Recordings
From CERN's
Recorded MBONE Sessions
page, download the relevant package and untar it (e.g.
gnutar -zxf ATLAS_97_06_05_1055_1245.tar.gz)
creating files such as ATLAS_97_06_05_1055_1245.0.v.rtp.
Use the prefix ATLAS_97_06_05_1055_1245.0 as an argument to the
generated playback script, e.g.
CERN5.play ATLAS_97_06_05_1055_1245.0 600
to start playback 10 minutes (600 seconds) into the recording.
To stop playback, execute e.g. "killall wrtpplay".