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This is an IPTV plugin for the Video Disk Recorder (VDR).

Written by:                  Rolf Ahrenberg
                             < R o l f . A h r e n b e r g @ s c i . f i >

                             Antti Seppälä
                             < a . s e p p a l a @ g m a i l . c o m >

Project's homepage:          http://www.saunalahti.fi/~rahrenbe/vdr/iptv/

Latest version available at: http://www.saunalahti.fi/~rahrenbe/vdr/iptv/

This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License version 2 as
published by the Free Software Foundation.
See the file COPYING for more information.

Requirements:

- Libcurl - the multiprotocol file transfer library
  http://curl.haxx.se/libcurl/

Description:

This plugin integrates multicast IPTV transport streams seamlessly into
VDR. You can use any IPTV channel like any other normal DVB channel for
live viewing, recording, etc. The plugin also features full section
filtering capabilities which allow for example EIT information to be
extracted from the incoming stream.

Currently the IPTV plugin has direct support for both multicast UDP/RTP
and unicast HTTP MPEG1/2, H.264 and H.265 transport streams. Also a file
input method is supported, but a file delay must be selected individually
to prevent VDR's transfer buffer over/underflow. Therefore the file input
should be considered as a testing feature only.

IPTV plugin also features a support for external streaming applications.
With proper helper applications and configuration IPTV plugin is able to
display not only MPEG1/2, H.264 and H.265 transport streams but also other
formats like MP3 radio streams, mms video streams and so on.

Installation:

tar -xzf /put/your/path/here/vdr-iptv-X.Y.Z.tgz
make -C iptv-X.Y.Z install

Setup menu:

- Protocol base port = 4321        Defines base port used in CURL/EXT
                                   protocol. Two ports are defined for
                                   each device.
                                   The port range is defined by the number
                                   of IPTV devices times two (max. 32).
                                   Valid range: 0...65503
- Use section filtering = 1        Defines whether section filtering shall
                                   be used.
                                   Valid range: 0...1
- Disable filters = 0              Certain section filters might cause some
                                   unwanted behaviour to VDR such as time
                                   being falsely synchronized etc. This
                                   option allows creation of blacklists of
                                   ill-behaving filters. If this option is
                                   set to a non-zero value, the menu page
                                   will contain that many "Disable filter"
                                   options which allow you to disable the
                                   individual section filters.
                                   Valid range: 0...7
- [Blue:Info]                      Opens IPTV information/statistics menu.

Information menu:

- [Red:General]                    Opens the general information page.
- [Green:Pids]                     Opens the pid statistics page.
- [Yellow:Filters]                 Opens the section filter statistics page.
- [Blue:Bits/bytes]                Toggles between bits and bytes mode.

Configuration:

- channels.conf

  TV6;IPTV:60:S=1|P=0|F=EXT|U=iptvstream.sh|A=0:I:0:0:680:0:0:6:0:0:0
  TV5;IPTV:50:S=0|P=1|F=FILE|U=/video/stream.ts|A=5:I:0:514:670:2321:0:5:0:0:0
  TV4;IPTV:40:S=0|P=1|F=HTTP|U=127.0.0.1/TS/2|A=3000:I:0:513:660:2321:0:4:0:0:0
  TV3;IPTV:30:S=1|P=0|F=CURL|U=http%3A//foo%3Abar@127.0.0.1%3A3000/TS/2|A=0:I:0:512:650:2321:0:3:0:0:0
  TV2;IPTV:20:S=1|P=0|F=UDP|U=127.0.0.1@127.0.0.1|A=1234:I:0:512:650:2321:0:2:0:0:0
  TV1;IPTV:10:S=1|P=0|F=UDP|U=127.0.0.1|A=1234:I:0:512:650:2321:0:1:0:0:0
           ^  ^   ^   ^     ^           ^      ^
           |  |   |   |     |           |      Source type ("I")
           |  |   |   |     |           Stream parameter
           |  |   |   |     |            UDP:  multicast port
           |  |   |   |     |            CURL: <<to be defined>>
           |  |   |   |     |            HTTP: HTTP port number
           |  |   |   |     |            FILE: file delay (ms)
           |  |   |   |     |            EXT:  script parameter
           |  |   |   |     Stream address
           |  |   |   |      UDP:  multicast [source@]group address
           |  |   |   |      CURL: HTTP/HTTPS URL; colons (%3A) and pipes (%7C) shall be URL encoded
           |  |   |   |      HTTP: URL; missing the scheme name part and possible port declaration
           |  |   |   |      FILE: file location
           |  |   |   |      EXT:  script location
           |  |   |   Stream protocol ("UDP", "CURL", "HTTP", "FILE", "EXT")
           |  |   Pid scanner ("0" disable, "1" enable)
           |  Section id (Sid/Nid/Tid) scanner ("0" disable, "1" enable)
           Unique enumeration

- UDP multicast rules for iptables firewall

  # Multicast UDP packets
  iptables -A INPUT -i eth0 -p udp -d 224.0.0.0/4 --dport 1234 -j ACCEPT

  # IGMP required by multicasts
  iptables -A INPUT -i eth0 -p igmp -d 224.0.0.0/4 -j ACCEPT

  # Default routing for multicast
  route add -net 224.0.0.0 netmask 224.0.0.0 eth0

External streaming:

- To watch an externally received channel add an EXT entry to channels.conf
  and specify a script name and parameter. The specified script is executed
  from plugin resource directory when VDR tunes to the channel. The specified
  script parameter is passed to the script and it can be used to select for
  example between different URLs.

- When an EXT or CURL/RTSP channel is opened the IPTV plugin opens an UDP
  listening port on the localhost. The external script is responsible for
  supplying IPTV plugin with MPEG2 TS data in UDP/RTP format to the listening
  port. The data will be processed in VDR like a normal DVB broadcast. The
  listening base port can be specified in the plugin configuration menu.

- Each IPTV device has different listen port. The port number is specified
  as a base port number plus IPTV device index minus one. Maximum of 8 IPTV
  devices can be used simultaneously.

- IPTV plugin includes an example script which uses VLC media player for
  receiving streams, transcoding and handing the result to IPTV plugin.

Notes:

- Working EIT requires correct Nid/Tid/Sid values as the NIT filter cannot
  determine the type (satellite/cable/terrestrial) of the IPTV transport
  stream.

- The following section filters are recommended to be disabled:
  "NIT (0x40)", "SDT (0x42)", "TDT (0x70)"

- The IPTV devices look for a "/tmp/vdr-iptv<devicenumber>.dvr" fifo at
  startup. If the fifo is found and succesfully opened, the device writes
  the current data stream into it. This can be used for debugging purposes.

- Multiple channels with identical service id should have frequency
  difference of 4 or greater. It's recommended to use frequencies in decades
  (10, 20, 30, 40, ...) for all IPTV channel entries.

- VLC processes won't get killed on some setups with the provided iptvstream.sh
  script and the iptvstream-notrap.sh script should be used instead in these
  cases.

- If received MPEG-2 TS streams carry CA descriptors, you'll have to apply
  "disable_ca_updates" patch to the VDR in order to get rid of "Channel not
  available" messages.

- EIT scanning functionality is disabled by default.

- Section id and pid scanners should be disabled after the correct data is
  found. This can be made via VDR's channel editor.

- Source-specific multicast (SSM) can be enabled by defining both the source
  address and the group address separated by a '@' character. This will use
  IGMP v3 protocol:
  "U=<source address>@<group address>"

- The CURL implementation supports only RTSP/HTTP/HTTPS protocols and an
  optional netrc configuration file for authentication:
  $(CONFDIR)/iptv/netrc

- You can quite easily figure out correct DVB triplet values by using the
  multicat and dvbsnoop tools:
  $ multicat -u -d 1620000000 @127.0.0.1:1234 /tmp/video.ts
  $ dvbsnoop -s ts -if /tmp/video.ts -tssubdecode -hexdumpbuffer 0x12 | \
    grep -m1 -A8 Service_ID | grep _ID

Acknowledgements:

- The IPTV section filtering code is derived from Linux kernel.

- The pid scanning code is derived from Udo Richter's streamplayer plugin.