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300 lines
12 KiB
Plaintext
300 lines
12 KiB
Plaintext
This is a "plugin" for the Video Disk Recorder (VDR).
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Written by: Sascha Volkenandt <sascha@akv-soft.de>
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Project's homepage: http://www.magoa.net/linux/
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Latest version available at: http://www.magoa.net/linux/index.php?view=streamdev
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See the file COPYING for license information.
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Contents:
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---------
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1. Description
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2. Installation
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2.1 VDR 1.2.X
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2.2 VDR 1.3.X
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3. Usage
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3.1 Usage VDR-to-VDR server
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3.2 Usage HTTP server
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3.3 Usage VDR-to-VDR client
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3.4 General Usage Notes
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4. VDR-to-VDR client notes (PLEASE READ IF YOU HAVE ONE)
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4.1 EPG data [OUTDATED]
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4.2 Teletext / OSD Teletext
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4.3 AnalogTV [OUTDATED]
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5. Known Problems
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1. Description:
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---------------
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This PlugIn is a VDR implementation of the VTP (Video Transfer Protocol)
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Version 0.0.3 (see file PROTOCOL) and a basic HTTP Streaming Protocol.
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It consists of a server and a client part, but both parts are compiled together
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with the PlugIn source, but appear as separate PlugIns to VDR.
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The client part acts as a full Input Device, so it can be used in conjunction
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with a DXR3-Card, XINE, SoftDevice or others to act as a working VDR
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installation without any DVB-Hardware including EPG-Handling.
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The server part acts as a Receiver-Device and works transparently in the
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background within your running VDR. It can serve multiple clients and it can
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distribute multiple input streams (i.e. from multiple DVB-cards) to multiple
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clients using the native VTP protocol (for VDR-clients), or using the HTTP
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protocol supporting clients such as XINE, MPlayer and so on. With XMMS or
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WinAMP, you can also listen to radio channels over a HTTP connection.
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It is possible to attach as many clients as the bus and network can handle, as
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long as there is a device which can receive a specific channel. Multiple
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channels homed on the same transponder (which is determined by it's frequency)
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can be broadcasted with a single device.
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Additional clients can be programmed using the Protocol Instructions inside
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the PROTOCOL file.
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2. Installation:
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----------------
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Let's say streamdev's version is 0.3.1 and vdr's version is 1.X.X. If you
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use anything else please exchange the version numbers appropriately (this
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way I don't have to update this section all the times;) ).
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After compiling the PlugIn as stated below, start either (or both) parts of it
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by specifying "-P streamdev-client" and/or "-P streamdev-server" on the VDR
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command line.
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What's important is that the client requests a channel using its Unique Channel
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ID. So, in order to find the channel at the server, it must have the same ID
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that is used on the client. You can achieve this by putting the server's
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channels.conf on the client, preferably after scanning (in case you use 1.2.X
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with AutoPID or 1.3.X).
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If you want to drive additional Input-Devices (with different sources) on the
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client, you can merge the channels.conf files. VDR will detect if the local
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device or the network device can receive the channels.
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Last, but not least you have to put the provided streamdevhosts.conf.example
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into the "plugins" subfolder of your config-directory (which is equal to your
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video-directory if not specified otherwise), rename it to streamdevhosts.conf
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and adjust it to your needs. The syntax is the same as for svdrphosts.conf, so
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please consult VDR's documentation on how to fill that file, if you can't do
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it on-the-fly. For example, if you didn't specify a separate config-directory,
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and specified your video directory as "/video0", the file has to be put to
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/video0/plugins/streamdevhosts.conf.
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2.1 VDR 1.2.X:
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--------------
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It is recommended that you apply a patch to VDR that improves thread
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cancellation. You can work without it, but you _might_ have delays in switching
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(especially when using VDR-to-VDR streaming) that are around three seconds.
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cd vdr-1.X.X/PLUGINS/src
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tar xvfz vdr-streamdev-0.3.1.tgz
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ln -s streamdev-0.3.1 streamdev
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cd ../..
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patch -p1 <PLUGINS/src/streamdev/patches/thread.c.diff
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make [options, if necessary] vdr
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make [options, if necessary] plugins
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2.2 VDR 1.3.X:
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--------------
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cd vdr-1.X.X/PLUGINS/src
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tar xvfz vdr-streamdev-0.3.1.tgz
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ln -s streamdev-0.3.1 streamdev
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cd ../..
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make [options, if necessary] vdr
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make [options, if necessary] plugins
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3. Usage:
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---------
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Start the server core itself by specifying -Pstreamdev-server on your VDR
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commandline. To use the client core, specify -Pstreamdev-client. Both parts
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can run in one VDR instance, if necessary.
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The parameter "Suspend behaviour" allows you to specify how the server should
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react in case the client requests a channel that would require switching the
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primary device (i.e. disrupt live-tv). If set to "Offer suspend mode" (the
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default), you will have a new entry in the main menu. Activating that will put
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the server into "Suspend Mode" (a picture is displayed on TV). Then, a client
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may switch the primary card to wherever it likes to. While watching TV (Suspend
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deactivated), the client may not switch the transponder on the primary device.
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If you set the behaviour to "Always suspended", there will be normal live-tv
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on the server, but whenever a client decides to switch the transponder, the
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server will lose it's live-tv. Set to "Never suspended", the server always
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prevents the client from switching transponders. If you set "Client may
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suspend" to yes, the client can suspend the server remotely (this only applies
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if "Offer suspend mode" is selected).
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3.1 Usage VDR-to-VDR server:
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----------------------------
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You can activate the VDR-to-VDR server part in the PlugIn's Setup Menu. It is
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deactivated by default. The Parameter "VDR-to-VDR Server Port" specifies the
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port where you want the server to listen for incoming connections. The server
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will be activated when you push the OK button inside the setup menu, so there's
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no need to restart VDR.
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NOTE: This mainly applies to One-Card-Systems, since with multiple cards there
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is no need to switch transponders on the primary interface, if the secondary
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can stream a given channel (i.e. if it is not blocked by a recording). If both
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cards are in use (i.e. when something is recorded, or by multiple clients),
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this applies to Multiple-Card-Systems as well.
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3.2 Usage HTTP server:
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----------------------
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You can use the HTTP part by accessing the server with a HTTP-capable media
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player (such as XINE, MPlayer, and so on, if you have appropriate MPEG2-codecs
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installed). In the PlugIn's Setup, you can specify the port the server will
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listen to with the parameter "HTTP Server Port". The parameter "HTTP Streamtype"
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allows you to specify a default stream type, which is used if no specific type
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has been requested in the URL (see below). The supported stream types are:
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TS Transport Stream (i.e. a dump from the device)
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PES Packetized Elemetary Stream (VDR's native recording format)
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PS Program Stream (SVCD, DVD like stream)
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ES Elementary Stream (only Video, if available, otherwise only Audio)
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If you leave the default port (3000), you can access the streams like this:
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http://hostname:3000/3
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http://hostname:3000/S19.2E-0-12480-898
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The first one will deliver a channel by number on the server, the second one
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will request the channel by unique channel id. In addition, you can specify
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the desired stream type as a path to the channel.
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http://hostname:3000/TS/3
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http://hostname:3000/PES/S19.2E-0-12480-898
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The first one would deliver the stream in TS, the second one in PES format.
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Possible values are 'PES', 'TS', 'PS' and 'ES'. You need to specify the ES
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format explicitly if you want to listen to radio channels. Play them pack i.e.
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with mpg123.
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mpg123 http://hostname:3000/ES/200
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3.3 Usage VDR-to-VDR client:
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----------------------------
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The parameter "Remote IP" uses an IP-Adress-Editor, where you can just enter
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the IP number with the number keys on your remote. After three digits (or if
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the next digit would result in an invalid IP adress, or if the first digit is
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0), the current position jumps to the next one. You can change positions with
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the left and right buttons, and you can cycle the current position using up
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and down. To confirm the entered address, press OK. So, if you want to enter
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the IP address "127.0.0.1", just mark the corresponding entry as active and
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type "127001<OK>" on your remote. If you want to enter "192.168.1.12", type
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"1921681<Right>12<OK>".
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The parameters "Remote IP" and "Remote Port" in the client's setup specify the
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address of the remote VDR-to-VDR server to connect to. Activate the client by
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setting "Start Client" to yes. It is disabled by default, because it wouldn't
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make much sense to start the client without specifying a server anyway. The
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client is activated after you push the OK button, so there's no need to restart
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VDR. Deactivation on-the-fly is not possible, so in order to deactivate the
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client, you will have to restart VDR. All other settings can be changed without
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restarting VDR.
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The client will try to connect to the server (in case it isn't yet) whenever
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a remote channel is requested. Just activate the client and switch to a
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channel that's not available by local devices. If anything goes wrong with the
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connection between the two, you will see it in the logfile instantly. If you
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now switch the client to a channel which isn't covered by it's own local
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devices, it will ask the server for it. If the server can (currently) receive
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that channel, the client will show it until you switch again, or until the
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server needs that card (if no other is free) for a recording on a different
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transponder.
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You can choose a remote streamtype in the setup. I'd suggest TS streaming as
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it has a much shorter delay than PES streaming (compared to live-view of the
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same channel on the server), and transmits more information such as AC3 and
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teletext data.
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When setting the parameter "MultiPID streaming" to yes (the default) (only
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applies if the streamtype is TS), only the needed PIDs are transferred, and
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additional PIDs can be turned on during an active transfer. This makes it
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possible to switch languages, receive additional channels (for recording on
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the client) and use plugins that use receivers themselves (like osdteletext).
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The last parameter, "Synchronize EPG", will have the client synchronize it's
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program table with the server every now and then, but not regularly. This
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happens when starting the client, and everytime VDR does its housekeeping
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tasks. The only thing that's guaranteed is, that there will be a minimum
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interval of ten seconds between each EPG synchronization.
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The client has a Main Menu entry called "Streaming Control". This is used to
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control various aspects of the remote server VDR. Inside, you will find
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"Remote Timers", "Remote Recordings", "Suspend server" and "Synchronize EPG".
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The "Remote Timers" entry gives you the possibility to edit, create and delete
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the server's timers remotely. Every timer is synchronized before the requested
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action actually takes place. This only leaves a very short time-span (of a few
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milliseconds) in which a race-condition could happen.
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"Remote Recordings" shows up all recordings that the server can access. Only
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deleting recordings is implemented, yet.
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With "Suspend Server", you can send the server into suspend mode remotely, if
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the server is set to "Offer suspend mode" and allows the client to suspend.
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Last but not least, "Synchronize EPG" starts a synchronization in case you
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don't want to do it regularly, or in case you just activated it and can't wait
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for the first synchronization to happen by itself.
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3.4 General Usage Notes:
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------------------------
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If there's still some debug output on stdout, please ignore it ;)
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4. VDR-to-VDR client notes:
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---------------------------
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4.1 EPG data:
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--------------
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[ OUTDATED, see "Synchronize EPG" in 3.2 ]
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4.2 Teletext / OSD Teletext:
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-----------------------------
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Usual teletext will probably not work on the client, if it has no DVB hardware.
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I never tried, and probably I never will, so don't ask about it please ;)
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Osdteletext-0.3.1 (and later) definitely work when used in MultiPID Streaming
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mode.
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4.3 AnalogTV
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------------
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Works with ivtv and analogue cards according to Andreas Kool.
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5. Known Problems:
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------------------
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- Recordings & Timers on the client side could endanger Timers & Recordings on
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the server, as they will have the same priority (by default). Set the
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default priority to i.e. 40 if you want the server to supersede the client.
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- Sometimes, if you reload VDR too often (for example while recompiling), the
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driver can get "stuck" in some situations. Try a driver restart if anything
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you think should work doesn't before sending a bug-report :-).
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[ ADDITION ]
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In the meantime I have discovered that this error is caused by the all-
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mysterical UPT (unknown picture type) error :-(.
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