Gqwill69: /* Backend */

2013-01-05T17:39:10Z

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XBMC based Mythtv installation guide (headless)

== XBMC addon ==
apt-get install xbmc-pvr-mythtv-cmyth
== Backend ==
apt-get install mythtv-backend-master

Fix mythweb
a2dissite default-mythbuntu
a2ensite default
service apache2 reload

Setup MythTV from remote Linux Desktop
ssh -X username@''xbmcservername'' /usr/bin/mythtv-setup

== S-Video/Composite Input Recording ==
If you would like to be able to view or record input from either s-video or composite inputs on a PVR-x50 card, the following hack will allow you to do just that.

Via mythtv-settings, do the following:

1. Select "Video Sources," then select "[New video source]." Name this source anything you like (Composite for our example) then set the "XMLTV listings grabber:" to "No grabber." and select finish.

2. Go into the "Channel Editor" then select "[New Channel]." Name this channel anything you like (Composite Input for our example), set the channel number to a channel that you do *not* have, then set the video source to be the source you just created (Composite for our example.) Select finish to continue.

3. Select "Input Connections" from the main mythtv-settings screen and select your composite or s-video input. (For an example PVR-150 you might see "[MPEG : /dev/video0 ] {Composite 0} -> {None}." Set the video source to be the source you created in step 1, and make sure that the starting channel is the channel that you created in step 2. Select finish and exit the settings.

4. Start the backend then frontend, then change the channel to the new channel that you created. With nothing plugged in you should see a black screen. Connect an input device (VCR, camera, etc..) and you will then be able to see and record your video.

== Channel Change via HTTP ==
Install directv_http.pl
<pre>
#!/usr/bin/perl
use LWP::UserAgent;
use JSON;
#use strict;

# Get time for logging, if necessary
#($sec,$min,$hour,$mday,$mon,$year,$wday,$yday,$isdst)=localtime(time);
#$year = $year+1900;
#$mon = $mon+1;
$ua = LWP::UserAgent->new;
$ua->agent("$0/0.1 " . $ua->agent);
# $ua->agent("Mozilla/8.0") # pretend we are very capable browser

# If you want to log results of the channel change,
# uncomment the lines that look like:
## print MYFILE ("$year...
## close (MYFILE);
# As well as the lines at the beginning of this script that look like:
# Get time for logging, if necessary
## ($sec,$min,$hour,$mday,$mon,$year,$wday,$yday,$isdst)=localtime(time);
## $year = $year+1900;
## $mon = $mon+1;
# As well as the file for logging below. Change the path to something that
# makes sense...
#open (MYFILE, '>>/home/steve/Documents/dtvchangerdata.txt');

# get args
$dtv_ip = $ARGV[0];
$sleep_sec = $ARGV[1];
$arg = $ARGV[2];
$chan_num = "";
$numArgs = $#ARGV + 1;
$tune = 1;
$minor = 0;

if($numArgs == 0)
{
print "(10) Error: no command line arguments\n";
exit 1;
}

if($arg eq "getTuned")
{
$tune = 0;
}
elsif($arg eq "tune")
{
if(($ARGV[3] =~ m/-/) == 1)
{
@chan_arr = split(/-/, $ARGV[3]);
$chan_num = $chan_arr[0];
$minor = $chan_arr[1];
}
else
{
$chan_num = $ARGV[3];
}
$tune = 1;
}
else
{
print "(20) Error: command line argument invalid\n";
exit 1;
}

$url = 'http://'.$dtv_ip.':8080/tv/tune?major='.$chan_num;
if($tune == 0)
{
$url = 'http://'.$dtv_ip.':8080/tv/getTuned';
}
if($minor != 0)
{
$url = 'http://'.$dtv_ip.':8080/tv/tune?major='.$chan_num.'&minor='.$minor;
}
$req = HTTP::Request->new(GET => $url);
$req->header('Accept' => 'text/html');

$i = 0;

while($i < 21)
{
# send request
$res = $ua->request($req);

# check the outcome
if ($res->is_success)
{
#print $res->content."\n";
$json = new JSON;
$json_text = $json->decode($res->content);
$check_ok = $json_text->{status}->{msg};
#print "OK? ".$check_ok . "\n";

if(index($check_ok,"OK") != -1)
{
if($tune == 0)
{
print $res->content . "\n";
}
#print "Here 1\n";
sleep $sleep_sec;
#print "Here 2\n";
#print MYFILE ("$year-$mon-$mday $hour:$min:$sec, chan $chan_num: $i failures\n");
#close (MYFILE);
exit 0;
}
else
{
print "(30) Error: " . $check_ok . "\n";
#print MYFILE ("$year-$mon-$mday $hour:$min:$sec, chan $chan_num: $i failures, (30) Error ".$check_ok."\n");
#close (MYFILE);
exit 1;
}
}
$i++;

if($i >= 20)
{
print "(40) Error: " . $res->status_line . "\n";
#print MYFILE ("$year-$mon-$mday $hour:$min:$sec, chan $chan_num: $i failures, (40) Error ".$res->status_line."\n");
#close (MYFILE);
exit 1;
}
}
#print MYFILE ("$year-$mon-$mday $hour:$min:$sec, chan $chan_num: $i failures, How did I get here?\n");
#close (MYFILE);
exit 1;
</pre>
Under Video Sources, choose Svideo and insert the following command for channel changes.
/usr/local/bin/directv_http.pl 192.168.0.5 1 tune

== EPG ==
Download from host http://mc2xml.hosterbox.net/
http://mc2xml.bigteo.net/?h=ouue51m

How would I use mc2xml with MythTV?

Create a directory and move mc2xml there

mkdir ~/mc2xml
cd ~/mc2xml
mv ~/downloads/mc2xml .

Make mc2xml executable and run mc2xml with the "-c" and "-g" parameters to select and save a lineup to mc2xml.dat, and
update mythfilldatabase using the new xmltv.xml file

chmod 755 mc2xml
./mc2xml -c us -g 10000
mythfilldatabase --refresh 14 --file --sourceid 1 --xmlfile ./xmltv.xml

Disable mythfilldatabase from mythfrontend->setup->general
Set up a daily cron job to call a script that only updates mythfilldatabase if new tv data is available. (mc2xml returns 0
when it updates, 1 when no new data is available). This example runs daily at 3:27 am.

*/etc/crontab
27 3 * * * user /home/user/mc2xml/update.sh

*/home/mythtv/mc2xml/update.sh
#!/bin/sh
cd ~/mc2xml
if ~/mc2xml/mc2xml ; then
mythfilldatabase --refresh 14 --file --sourceid 1 --xmlfile ./xmltv.xml
fi
Older versions of mythfilldatabase require different parameters

From feedback: Mythfilldatabase loads the entire XMLTV file into RAM before entering it into the SQL database which can result in
swapping/slowness with large XMLTV files or on machines with limited RAM. You may want to split the xmltv file into smaller chunks
and import it in stages. Here is an example using tv_split from the xmltv package:

#!/bin/sh
#split by day:
nice tv_split xmltv.xml --output listings/%Y%m%d.xml
#or split by channel for even smaller files:
#nice tv_split xmltv.xml --output listings/%channel-%Y%m%d.xml
for f in $( ls listings/ ); do
nice mythfilldatabase --file --sourceid 1 --xmlfile listings/$f
rm -f listings/$f
done
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Gqwill69: /* Backend */