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MythWebFlash

Hi All,

UPDATE: This HOW-TO has been updated. Most files need changes. Main updated are;
Added: Improve stream startup (Extra script to wait for flash stream).
Added: 3 bit rates to choose from.
Added: Image settings are now in /var/www/mythweb/data/serverecording.
Change: Uses mythtranscode to parse file into ffmpeg, this should fix problematic streaming
and may even provide future ability to use "cut list"
REQUIREMENT: # ln -s /home/mythtv/.mythtv/mysql.txt /var/www/mythweb/mysql.txt

This HOWTO will show you how to get on-the-fly flash streaming within mythweb working.
The file locations are for the Mythtv 0.20 version of mythweb. There are several files to add, and some files to modify.

Knoppmyth R5E50 has an older version installed but there were some typo's.

  • In the file /var/www/mythweb/modules/tv/tmpl/default/streamrecording.php,
    add <?php or <? at the beginning, and delete the extra /body><html> at the end.
  • In the file /var/www/mythweb/data/serverecording,
    add these lines to the beginning, so it reads:

#!/bin/bash
#
# * Bash script to start and monitor server for Mythwebflash

Knoppmyth R5F1 has a working older version installed.

To use updated version of MythwebFlash follow as below.

To use MythWebFlash, simply click on the bitmap for the TV recording you wish to view, and
the stream will start at 128bps, else choose one of the listed rates.

Prerequisites

ffmpeg with SWF support. I have upgraded the version that came with Knoppmyth R5D1 but
the original version should be fine. The apache user (www-data) must have right access to
/var/www/mythweb/data which it should by default.

To access this externally you will need to forward ports 80, and 8090 to your knoppmyth box.

/var/www/mythweb/data/serverecording
(remember to chmod +x /var/www/mythweb/data/serverecording)

Code:

#!/bin/bash
#
# * Bash script to start and monitor server for Mythwebflash
# * Date: 2007-09-03 21:00:00 +1000
# * Version: 1.05
# * Auther: BigB
# *
#

export TERM=dumb

file=$1
bitrate=$2

function create_ffserver.conf(){
rm -f /var/www/mythweb/data/ffserver.conf

echo "Port 8090
BindAddress 0.0.0.0
MaxClients 1000
MaxBandwidth 1500
CustomLog -

<Feed feed1.ffm>
#File /var/www/mythweb/data/feed1.ffm
#FileMaxSize 128K
</Feed>
" >> /var/www/mythweb/data/ffserver.conf

if [ "$bitrate" -eq "128" ]; then
echo "
<Stream flash.swf>
Feed feed1.ffm
Format swf
AudioBitRate 8
AudioChannels 1
AudioSampleRate 11025
AudioCodec mp3
VideoBitRate 96
VideoFrameRate 4
VideoSize 144x80
VideoGopSize 40
VideoCodec flv
</Stream>
" >> /var/www/mythweb/data/ffserver.conf
else
if [ "$bitrate" -eq "256" ]; then
echo "
<Stream flash.swf>
Feed feed1.ffm
Format swf
AudioBitRate 16
AudioChannels 1
AudioSampleRate 11025
AudioCodec mp3
VideoBitRate 196
VideoFrameRate 6
VideoSize 288x160
VideoGopSize 20
VideoCodec flv
</Stream>
" >> /var/www/mythweb/data/ffserver.conf
else
if [ "$bitrate" -eq "384" ]; then
echo "
<Stream flash.swf>
Feed feed1.ffm
Format swf
AudioBitRate 16
AudioChannels 1
AudioSampleRate 11025
AudioCodec mp3
VideoBitRate 300
VideoFrameRate 10
VideoSize 288x160
VideoGopSize 20
VideoCodec flv
</Stream>
" >> /var/www/mythweb/data/ffserver.conf
fi
fi
fi

echo "
<Stream stat.html>
Format status
#ACL allow localhost
#ACL allow 192.168.0.0 192.168.255.255
</Stream>
<Redirect index.html>
URL http://www.ffmpeg.org/
</Redirect>
" >> /var/www/mythweb/data/ffserver.conf

}
DIRECTORY=/myth/tv
kill -9 `cat /var/www/mythweb/data/ffmpeg.pid`
kill -9 `cat /var/www/mythweb/data/transcode.pid`
killall -s 9 ffserver
rm -f /var/www/mythweb/data/feed1.ffm
rm -f /var/www/mythweb/data/audout
rm -f /var/www/mythweb/data/vidout
create_ffserver.conf

framewidth=`/usr/bin/mplayer -vo dummy -identify $DIRECTORY/$file 2>&1 |grep -E "ID_VIDEO_WIDTH" | cut -d=  -f2`
frameheight=`/usr/bin/mplayer -vo dummy -identify $DIRECTORY/$file 2>&1 |grep -E "ID_VIDEO_HEIGHT" | cut -d=  -f2`
framerate=`/usr/bin/mplayer -vo dummy -identify $DIRECTORY/$file 2>&1 |grep -E "ID_VIDEO_FPS" | cut -d=  -f2`

/usr/bin/ffserver -f /var/www/mythweb/data/ffserver.conf 1> /dev/null 2> /dev/null &
PID_FFSERVER=$!
echo $PID_FFSERVER > /var/www/mythweb/data/ffserver.pid
nice -n 19 /usr/bin/mythtranscode -p autodetect -i $DIRECTORY/$file -f /var/www/mythweb/data/ 2> /dev/null 1> /dev/null &
PID_TRANSCODE=$!
echo $PID_TRANSCODE > /var/www/mythweb/data/transcode.pid

#wait for fifos
WAIT_COUNT=30
while [ "$WAIT_COUNT" -gt "0" ]; do
   sleep 1
   if [ -e /var/www/mythweb/data/audout ] && [ -e /var/www/mythweb/data/vidout ]; then
      break
   else
      let WAIT_COUNT=WAIT_COUNT-1
   fi
done
if [ "$WAIT_COUNT" -eq "0" ]; then
   kill -9 `cat /var/www/mythweb/data/transcode.pid`
   killall -s 9 ffserver
   rm -f /var/www/mythweb/data/audout
   rm -f /var/www/mythweb/data/vidout
   exit 1
fi
sleep 1
nice -n 19 /usr/bin/ffmpeg -y -f s16le -ar 48000 -ac 2 -i /var/www/mythweb/data/audout -f rawvideo -r "$framerate" -aspect 16:9 -s "$framewidth"x"$frameheight" -i /var/www/mythweb/data/vidout http://localhost:8090/feed1.ffm 2> /dev/null 1>  /dev/null &


PID_FFMPEG=$!
echo $PID_FFMPEG > /var/www/mythweb/data/ffmpeg.pid

IDLE_COUNT=20
while [ "$IDLE_COUNT" -gt "0" ]; do
   sleep 1
   if [ "`lynx -dump http://localhost:8090/stat.html | grep -c "flash.swf"`" -lt "3" ]; then
      let "IDLE_COUNT = IDLE_COUNT - 1"
   else
      IDLE_COUNT=2
   fi
done

kill -9 `cat /var/www/mythweb/data/ffmpeg.pid`
kill -9 `cat /var/www/mythweb/data/transcode.pid`
rm -f /var/www/mythweb/data/audout
rm -f /var/www/mythweb/data/vidout
rm -f /var/www/mythweb/data/ffserver.conf
killall -s 9 ffserver

/var/www/mythweb/data/waitflash
(remember to chmod +x /var/www/mythweb/data/waitflash)

Code:

#!/bin/bash
#
# * Bash script to wait for valid flash stream Mythwebflash
# * Date: 2007-09-03 21:00:00 +1000
# * Version: 1.01
# * Auther: BigB
# *
#

IDLE_COUNT=30
while [ "$IDLE_COUNT" -gt "0" ]; do
   sleep 1
   if [ "`lynx -dump http://localhost:8090/stat.html | grep -c "feed1.ffm(input)"`" -gt "0" ]; then
      IDLE_COUNT=0
   else
      let "IDLE_COUNT = IDLE_COUNT - 1"
   fi
done
sleep 2

/var/www/mythweb/modules/tv/streamrecording.php

Code:


<?php
/**
 * Init Mythwebflash
 * Date: 2006-12-06 23:50:00 +1000
 * Version: 1.01
 * Auther: BigB
 *
/**/

// Load the class for this page
    require_once tmpl_dir.'streamrecording.php';

// Exit
    exit;

?>

/var/www/mythweb/modules/tv/tmpl/default/streamrecording.php

Code:


<?php
/**
 * Themed page for Mythwebflash
 * Date: 2007-09-03 12:00:00 +1000
 * Version: 1.04
 * Auther: BigB
 *
/**/
echo '<html>';
echo '<head>';
if(!isset($_GET['play'])){
   echo '<meta http-equiv="refresh" content="1;url=';
   echo $_SERVER['PHP_SELF']."?file=".$_GET['file']."&title=".$_GET['title']."&subtitle=".$_GET['subtitle']."&description=".$_GET['description']."&play=true";
   echo '">';
}
echo '<title>Stream recording</title>';
echo '</head>';
echo '<body>';

// Set the desired page title
    $page_title = 'MythWeb - Stream recording';
// Print the page header
    require 'modules/_shared/tmpl/default/header.php';



if(!isset($_GET['file'])){
        print"<br /><br /><center><strong>You can not access this page directly!</strong></center>";
        die;
}
if(!isset($_GET['width'])){
        $width = '300';
}
else {
        $width = $_GET['width'];
}
if(!isset($_GET['title'])){
        $title = 'Unknown Title';
}
else {
        $title = $_GET['title'];
}
if(!isset($_GET['subtitle'])){
        $subtitle = '';
}
else {
        $subtitle = $_GET['subtitle'];
}
if(!isset($_GET['description'])){
        $description = '';
}
else {
        $description = $_GET['description'];
}
if(!isset($_GET['height'])){
        $height = '220'; //accounts for toolbar at bottom
} else {
        $height = $_GET['height'];
}
if(!isset($_GET['bitrate'])){
        $bitrate = '128';
} else {
        $bitrate = $_GET['bitrate'];
}
$toplay = $_GET['file'];
if(!isset($_GET['play'])){
   system ("bash -c \"exec nohup setsid /var/www/mythweb/data/serverecording $toplay $bitrate 1> /dev/null 2> /dev/null &\"");
} else {
   system ("bash -c \"exec nohup setsid /var/www/mythweb/data/waitflash 1> /dev/null 2> /dev/null \"");
}
?>




<table width="100%" border="0" cellpadding="4" cellspacing="2" class="list small">
<tr class="recorded" height="15%">
<td rowspan="3" align="center" valign="middle" height="305" width="535">
<?php
if(isset($_GET['play'])){
   echo '<object classid="clsid:d27cdb6e-ae6d-11cf-96b8-444553540000" codebase="http://fpdownload.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=7,0,0,0" width="530" height="300" id="flvplayer" align="middle">';
   echo '<param name="movie" value="http://';
   echo getenv('SERVER_NAME');
   echo ':8090/flash.swf" />';
   echo '<param name="quality" value="high" />';
   echo '<param name="bgcolor" value="#ffffff" />';
   echo '<embed src="http://';
   echo getenv('SERVER_NAME');
   echo ':8090/flash.swf" width="530" height="300" quality="high" bgcolor="#fffff5" name="flvplayer" align="LT" type="application/x-shockwave-flash" pluginspage="http://www.macromedia.com/go/getflashplayer" />';
   echo '</object>';
}
else{
 echo 'Loading, Please wait...

';
 echo '<a href="';
 echo $_SERVER['PHP_SELF'] ."?file=".$_GET['file']."&title=".$_GET['title']."&subtitle=".$_GET['subtitle']."&description=".$_GET['description'].'>Click here if refresh fails after 10 seconds.</a>';
}
?>
</td>
<td width="20%">
<?php echo $title ?>
</td>
<td>
<?php echo $subtitle ?>
</td>
</tr>
<tr class="recorded">
<td colspan="2" valign="top">
<?php echo $description ?>
</td>
</tr>
</table>





</body></html>

You need to modify /var/www/mythweb/modules/tv/tmpl/default/recorded.php
It was around line 274, but the important line is the one starting with echo '<a

Code:

            if (file_exists(cache_dir.'/'.basename($show->filename).'.png')) {
            list($width,$height,$type,$attr)=getimagesize(cache_dir.'/'.basename($show->filename).'.png');
                $clean_desc=str_replace("\"","",$show->description);
                echo '<a href="streamrecording?file='.basename($show->filename).'&title='.$show->title.'&subtitle='.$show->subtitle.'&description='.$clean_desc.'"name=\"$row\"target=\"_new\">'
                    .'<img id="'.$show->filename.'"src="'.root.cache_dir.'/'.str_replace('%2F','/',rawurlencode(basename($show->filename))).'.png"'.$attr.'border="0">'
                    .'</a>';
            }

Another change around line 316, it's a php block that provides several bit rates to stream at;

Code:

</tr><tr id="statusrow_<?php echo $row ?>" class="recorded">
    <td nowrap colspan="<?php echo 6 + ($_SESSION['recorded_descunder']? 0 : 1) + $recgroup_cols?>"align="center">
<?php
        $clean_desc=str_replace("\"","",$show->description);
         echo '<p align="left">Stream: ';
        echo '<a href="streamrecording?file='.basename($show->filename).'&title='.$show->title.'&subtitle='.$show->subtitle.'&description='.$clean_desc.'&bitrate=128"name=\"$row\"target=\"_new\">128kbps</a>';
        echo '<a href="streamrecording?file='.basename($show->filename).'&title='.$show->title.'&subtitle='.$show->subtitle.'&description='.$clean_desc.'&bitrate=256"name=\"$row\"target=\"_new\">256kbps</a>';
        echo '<a href="streamrecording?file='.basename($show->filename).'&title='.$show->title.'&subtitle='.$show->subtitle.'&description='.$clean_desc.'&bitrate=384"name=\"$row\"target=\"_new\">384kbps</a>';
?>
        <span style="padding-left: 25px">
        <span style="padding-right: 25px">
<?php echo t('has commflag')
?>

You also need to modify /var/www/mythweb/modules/tv/handler.php to allow the new file.
Near line 57, the important bit is to add 'streamrecording' to the array.

Code:

// Unknown section?  Use the default
    if (!in_array($Path[1], array('detail', 'channel', 'search', 'movies', 'streamrecording'))
            && empty($Modules['tv']['links'][$Path[1]]))
        $Path[1] = 'list';

The config file (/etc/ffserve.conf) is no longer required as it is dynamically created is /var/www/mythweb/data

For interest you can connect to http://localhost:8090/stat.html for a status of the stream server.

BigB.


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