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Htsp » History » Version 127

Jaroslav Kysela, 2015-05-29 22:12

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h1. Home Tv Streaming Protocol (HTSP) - Version 21
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h2. General
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HTSP is a TCP based protocol primarily intended for streaming of live TV and related meta data such as channels, group of channels (called tags in HTSP) and electronic program guide (EPG) information.
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The transmission and reception of a channel over HTSP is referred to as a subscription. A single HTSP session can handle as many concurrent subscriptions as the bandwidth and CPU permits.
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The HTSP server in tvheadend has a payload-aware scheduler for prioritizing more important packets (such as I-frames) before less important ones (such as B-frames). This makes HTSP suitable for long-distance transmissions and/or paths with non-perfect delivery.
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(It has been tested with a server in Stockholm and the client in Berlin).
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For information about the HTSP wire format please read [[htsmsgbinary|HTSMSG binary format]]
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If you're looking to develop a new client, there are several existing client implementations from which you might be able to gain knowledge:
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* "XBMC":https://github.com/opdenkamp/xbmc/tree/master/xbmc/pvrclients/tvheadend
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* "Showtime":https://github.com/andoma/showtime/tree/master/src/backend/htsp
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* "TVHGuide":https://github.com/john-tornblom/TVHGuide
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* "PyHTSP":https://github.com/adamsutton/tvheadend/tree/master/lib/py/tvh/htsp.py (This is a demo client and is WIP, it has limited functionality).
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----
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h2. Protocol Changes
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h3. v18..v19
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* autorec/timerec structures
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** added directory field (forced output directory)
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** added enabled field
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h3. v17..v18
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* added addTimerecEntry, deleteTimerecEntry methods
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* added timerecEntryAdd, timerecEntryUpdate, timerecEntryDelete server-to-client methods
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* extended addAutorecEntry method
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** added start/startWindow/name fields
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** added owner/creator fields
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** obsoleted creator field
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* extended dvrEntryAdd, dvrEntryUpdate
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** added timerecId field
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** added owner/creator fields
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* extended addAutorecEntry, deleteAutorecEntry methods
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** added start/startWindow fields
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** obsoleted approxTime
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** added name/owner/creator fields
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* extended autorecEntryAdd, autorecEntryUpdate server-to-client methods
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** fields like for addAutorecEntry
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* extended getTag method
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** added tagIndex field
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h3. v16..v17
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* extended subscriptionStart server-to-client method
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** added meta field
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* changed H264 meta data handling (codec meta data are in the meta field only in start message)
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* VORBIS and AAC codecs have codec specific meta data in the meta field in start message
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* changed subscribe method
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** the normts is always active and the parameter is ignored
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h3. v15..v16
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* added getProfiles, getDvrConfigs methods
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* removed getCodecs methods
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* extended subscribe method
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** add profile field
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h3. v14..v15
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* extended channelAdd, channelUpdate server-to-client methods
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** the channelIcon URL can be relative 'imagecache/%d' or '/imagecache/%d'
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* extended getChannel method
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** the channelIcon URL can be relative 'imagecache/%d' or '/imagecache/%d'
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h3. v13..v14
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* added getChannel method
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h3. v12..v13
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* added addAutorecEntry method
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* added deleteAutorecEntry method
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* added autorecEntryAdd, autorecEntryUpdate, autorecEntryDelete server-to-client methods
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* extended channelAdd server-to-client method
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** added channelNumberMinor (for {major}.{minor} channel numbers)
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* extended dvrEntryAdd and dvrEntryUpdate server-to-client methods
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** added eventId, autorecId, startExtra, stopExtra, retention, priority, contentType fields
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* extended addDvrEntry method
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** added retention
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* extended updateDvrEntry method
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** added retention, priority
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* extended epgQuery method
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** added minduration, maxduration
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* added subscriptionGrace server-to-client method
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h3. v11..v12
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* added subscriptionFilterStream method
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* added getDvrCutpoints method
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h3. v10..v11
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* added audio_type in the subscriptionStart server-to-client method
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* added getCodecs method
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h2. Communication
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This communication is currently implemented by using htsmsg's. All strings are encoded as UTF-8.
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There are two distinct ways for communication within HTSP.
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Apart from this there is a number of messages that needs to be exchanged during login, see the login section below.
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h3. RPC communication
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There is a normal RPC way of doing things. I.e. the client sends a request and the server responds with a reply. All the RPC methods are listed below as the 'Client to Server' methods. Apart from all message fields listed within each message type the client can add an additional field:
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RPC request extra fields:
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<pre>
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seq              int  optional   Sequence number. This field will be echoed back by the server in the reply.
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username         str  optional   Username, in combination with 'digest' this can be used to raise the privileges
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                                 for the session in combination with invocation of a method. 
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digest           bin  optional   Used to raise privileges.
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</pre>
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The followings field should be used by the client to match the reply with the request.
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All replies are guaranteed to arrive in the same order as the requests.
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Even so, probably the best way to implement the request-reply client is by taking advantage of the 'seq' field.
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RPC reply extra fields:
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<pre>
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seq              int  optional   Sequence number. Same as in the request.
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error            str  optional   If present an error has occurred and the text describes the error.
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noaccess         int  optional   If present and set to '1' the user is prohibited from invoking the method due to 
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                                 access restrictions. 
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</pre>
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h3. Streaming communication
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For streaming of live TV and various related messages the server will continuously push data to the client.
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These messages are referred to as asynchronous messages and always have the 'method' field set and never have the 'seq' field set.
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Also, the client can enable an additional asyncMetadata mode and by doing so it will be notified by the server when meta data changes. (EPG updates, creation of channels and tags, etc). 
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h3. Authentication
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In Tvheadend, each method has an associated access restriction. Currently there is only one restriction (Streaming). However, this may change in the future.
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Privileges for these restrictions may be granted in two ways: Username + Password and/or Source IP address.
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Therefore it is possible to gain permissions to the system without entering a username and password.
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While this is really useful it also complicates the authentication schema a bit.
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Upon connect the initial privileges will be raised based on the source address.
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Before any username / password based authentication has taken place the client must have
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obtained a challenge (which stays fixed for the session). This is done via the 'hello' method.
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In principle it's possible to use two different authentication idioms with HTSP.
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Depending on how your application works one or another may be more suitable.
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While they do not really differ from a protocol point of view it's worth mentioning a bit about them here:
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h3. Initial login authentication
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The client performs all of its authentication using the 'login' method.
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It may choose to send:
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* Username and password: Privileges will be raised based on these credentials.
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* Username only: Privileges will be based on just the source address. The username will be used for various logging purposes.
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* Nothing: Privileges will be based on just the source address.
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If no privileges are granted after the login message has been received by the server (i.e. both network and username + password based)
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the server will reply with 'noaccess' set to 1. A client that only employs initial login should honor this flag and ask the
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user for a username + password and retry by using the 'authenticate' method. I.e. it should not send the 'login' method again.
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h3. On-demand authentication
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The client performs all of its authentication when it needs to.
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When using this method, the client will check every RPC reply for the 'noaccess' field.
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If it set to 1 it whould ask the user for username + password and retry the request but also
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add 'username' and 'digest' to the original message. (See _RPC request extra fields_ above)
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Typically it would not send a username or digest during login.
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----
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h2. Client to Server (RPC) methods
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h3. hello
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Used to identify the client toward the server and to get the session challenge used to
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hash passwords into digests. The client can request a different version of the HTSP
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protocol with this method. If no 'hello' message is sent the server assumes latest version
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is to be used.
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Client/Server should select lowest common version, if this is not possible connection should be terminated.
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Request message fields:
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<pre>
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htspversion        u32   required   Client preferred HTSP version.
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clientname         str   required   Client software name.
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clientversion      str   required   Client software version.
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</pre>
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Reply message fields:
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<pre>
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htspversion        u32   required   The server supports all versions of the protocol up to and including this number.
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servername         str   required   Server software name.
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serverversion      str   required   Server software version.
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servercapability   str[] required   Server capabilities (Added in version 6)
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challenge          bin   required   32 bytes randomized data used to generate authentication digests
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webroot            str   optional   Server HTTP webroot (Added in version 8)
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                                    Note: any access to TVH webserver should include this at start of URL path
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</pre>
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Note: possible values for servercapability[]:
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<pre>
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cwc                Descrambling available
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v4l                Analogue TV available
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linuxdvb           Linux DVB API available
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imagecache         Image caching available
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timeshift          Timeshifting available (Added in version 9).
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</pre>
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h3. authenticate
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This can be used to issue authentication without doing anything else.
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If no privileges are gained it will return with 'noaccess' set to 1.
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Request message fields:
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<pre>
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None   
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</pre>
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Reply message fields:
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<pre>
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noaccess           u32   optional   If set to 1, no privileges were granted.
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</pre>
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----
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h3. getDiskSpace (Added in version 3)
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Return diskspace status from Tvheadend's PVR storage
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Request message fields:
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<pre>
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None
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</pre>
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Reply message fields:
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<pre>
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freediskspace      s64   required   Bytes available.
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totaldiskspace     s64   required   Total capacity.
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</pre>
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h3. getSysTime (Added in version 3)
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Return system time on the server.
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Request message fields:
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<pre>
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None
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</pre>
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Reply message fields:
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<pre>
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time               s64  required   UNIX time.
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timezone           s32  required   Minutes west of GMT.
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</pre>
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----
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h3. enableAsyncMetadata
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When this is enabled the client will get continuous updates from the server about added, update or deleted channels, tags, dvr and epg entries.
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An interactive application that presents the user with information about these things should probably enable this and the implement the various server to client methods.
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Request message fields:
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<pre>
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epg                u32   optional   Set to 1, to include EPG data in async, implied by epgMaxTime (Added in version 6).
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lastUpdate         s64   optional   Only provide metadata that has changed since this time (Added in version 6).
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epgMaxTime         s64   optional   Maximum time to return EPG data up to (Added in version 6)
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language           str   optional   RFC 2616 compatible language list (Added in version 6)
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</pre>
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Reply message fields:
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<pre>
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None
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</pre>
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Once the reply as been sent the initial data set will be provided, and then updates will arrive asynchronously after that. The initial data dump is sent using the following messages:
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<pre>
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tagAdd                   optional
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channelAdd               optional
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tagUpdate                optional
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dvrEntryAdd              optional
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eventAdd                 optional   (Added in version 6)
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initialSyncComplete      required
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</pre>
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----
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h3. getChannel (Added in version 14)
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Request information about the given channel.
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Request message fields:
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<pre>
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channelId          u32   required   Channel ID.
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</pre>
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Reply message fields:
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<pre>
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see channelAdd
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</pre>
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----
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h3. getEvent
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Request information about the given event. An event typically corresponds to a program on a channel.
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The language field in the request allows preference for languages to be requested for the various string fields.
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Request message fields:
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<pre>
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eventId            u32   required   Event ID.
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language           str   optional   RFC 2616 compatible language list (Added in version 6)
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</pre>
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Reply message fields:
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<pre>
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see eventAdd
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</pre>
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h3. getEvents (Added in version 4)
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Request information about a set of events. If no options are specified the entire EPG database will be returned.
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Request message fields:
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<pre>
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eventId            u32   optional   Event ID to begin from (Optional since version 6)
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channelId          u32   optional   Channel ID to get data for (Added in version 6)
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numFollowing       u32   optional   Number of events to add (Optional since version 6)
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maxTime            u64   optional   Maximum time to return data up to (Added in version 6)
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language           str   optional   RFC 2616 compatible language list (Added in version 6)
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</pre>
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Reply message fields:
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<pre>
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events             msg[] required   List of events, using response message fields from eventAdd
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</pre>
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h3. epgQuery (Added in version 4)
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Query the EPG (event titles) and optionally restrict to channel/tag/content type.
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Request message fields:
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<pre>
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query              str   required  Title regular expression to search for
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channelId          u32   optional  [[ChannelId]] to restrict search to
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tagId              u32   optional  [[TagId]] to restrict search to
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contentType        u32   optional  DVB content type to restrict search to
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minduration        u32   optional  Minimal duration in seconds (Added in version 13)
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maxduration        u32   optional  Maximal duration in seconds (Added in version 13)
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language           str   optional  RFC 2616 compatible language list for title (Added in version 6)
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full               u32   optional  Output full event list rather than just IDs
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</pre>
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Reply message fields:
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if full == 1
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<pre>
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events             msg[] optional   List of events, using response message fields from eventAdd
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</pre>
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else
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<pre>
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eventIds           u32[] optional  List of eventIds that match the query
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</pre>
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h3. getEpgObject
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Get detailed EPG Object info.
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Request message fields:
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<pre>
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id                 u32   required  Object ID
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type               u32   optional  Object type
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</pre>
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Reply message fields:
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<pre>
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TODO
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</pre>
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----
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h3. getDvrConfigs (Added in version 16)
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Return a list of DVR configurations.
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Reply message fields:
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<pre>
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dvrconfigs         msg[]      optional   Supported DVR configurations.
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</pre>
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Message fields:
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<pre>
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uuid               str        required   DVR configuration ID
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name               str        required   DVR configuration Name
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comment            str        required   DVR configuration Comment
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</pre>
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h3. addDvrEntry (Added in version 4)
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Create a new DVR entry. Either eventId or channelId, start and stop must be specified.
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Request message fields:
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<pre>
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eventId            u32   optional   Event ID (Optional since version 5).
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channelId          u32   optional   Channel ID (Added in version 5)
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start              s64   optional   Time to start recording (Added in version 5)
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stop               s64   optional   Time to stop recording (Added in version 5)
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retention          u32   optional   Retention time in days (Added in version 13)
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creator            str   optional   Name of the event creator (Added in version 5, obsoleted in version 18 - applications are not allowed to change credential)
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priority           u32   optional   Recording priority (Added in version 5)
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startExtra         s64   optional   Pre-recording buffer in minutes (Added in version 5)
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stopExtra          s64   optional   Post-recording buffer in minutes (Added in version 5)
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title              str   optional   Recording title, if no eventId (Added in version 6)
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description        str   optional   Recording description, if no eventId (Added in version 5)
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configName         str   optional   DVR configuration name or UUID
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</pre>
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Reply message fields:
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<pre>
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success            u32   required   1 if entry was added, 0 otherwise
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id                 u32   optional   ID of created DVR entry
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error              str   optional   English clear text of error message
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</pre>
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h3. updateDvrEntry (Added in version 5)
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Update an existing DVR entry.
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Request message fields:
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<pre>
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id                 u32   required   DVR Entry ID
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start              s64   optional   New start time
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stop               s64   optional   New stop time
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title              str   optional   New entry title
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description        str   optional   New entry description (Added in version 6)
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startExtra         s64   optional   New pre-record buffer (Added in version 6)
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stopExtra          s64   optional   New post-record buffer (Added in version 6)
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configName         str   optional   New DVR configuration name or UUID
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retention          u32   optional   Retention in days (Added in version 13)
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priority           u32   optional   Recording priority (Added in version 13)
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</pre>
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Reply message fields:
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<pre>
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success            u32   required   1 if update as successful, otherwise 0
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error              str   optional   Error message if update failed
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</pre>
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h3. cancelDvrEntry (Added in version 5)
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Cancel an existing recording, but don't remove the entry from the database.
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Request message fields:
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<pre>
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id                 u32   required   dvrEnryId to delete
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</pre>
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Reply message fields:
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<pre>
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success            int   required   1 if entry was cancelled
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error              str   optional   Error message if cancellation failed
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</pre>
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h3. deleteDvrEntry (Added in version 4)
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Delete an existing DVR entry from the database.
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Request message fields:
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<pre>
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id                 u32   required   DVR Entry ID
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</pre>
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Reply message fields:
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<pre>
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success            u32   required   1 if entry was removed
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error              str   optional   Error message if the delete fails
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</pre>
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h3. getDvrCutpoints (Added in version 12)
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Get DVR cutpoints.
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Request message fields:
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<pre>
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id                 u32   required   DVR Entry ID
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</pre>
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Reply message fields:
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<pre>
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cutpoints          msg[] optional   List of cutpoint entries, if a file is found and has some valid data.
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</pre>
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Cutpoint fields:
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<pre>
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start              u32   required   Cut start time in ms.
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end                u32   required   Cut end time in ms.
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type               u32   required   Action type: 
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                                      0=Cut, 1=Mute, 2=Scene, 
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                                      3=Commercial break.
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</pre>
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---
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h3. addAutorecEntry (Added in version 13)
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Create a new Autorec DVR entry. Title must be specified.
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Request message fields:
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<pre>
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title              str   required   Title for the recordings.
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directory          str   optional   Forced directory name - missing or empty = auto (Added in version 19).
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name               str   optional   Name of this autorec entry (Added in version 18).
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configName         str   optional   DVR Configuration Name / UUID.
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channelId          u32   optional   Channel ID.
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minDuration        u32   optional   Minimal duration in seconds (0 = Any).
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maxDuration        u32   optional   Maximal duration in seconds (0 = Any).
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daysOfWeek         u32   optional   Bitmask - Days of week (0x01 = Monday, 0x40 = Sunday, 0x7f = Whole Week, 0 = Not set).
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priority           u32   optional   Priority (0 = Important, 1 = High, 2 = Normal, 3 = Low, 4 = Unimportant, 5 = Not set).
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approxTime         u32   optional   Minutes from midnight (up to 24*60) (window +- 15 mintes) (Obsoleted from version 18).
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start              s32   optional   Minutes from midnight (up to 24*60) for the start of the time window (including) (Added in version 18).
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startWindow        s32   optional   Minutes from modnight (up to 24*60) for the end of the time window (including, cross-noon allowed) (Added in version 18).
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startExtra         s64   optional   Extra start minutes (pre-time).
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stopExtra          s64   optional   Extra stop minutes (post-time).
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comment            str   optional   User Comment.
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</pre>
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Reply message fields:
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<pre>
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success            u32   required   1 if entry was added, 0 otherwise
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id                 str   optional   ID (string!) of created autorec DVR entry
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error              str   optional   English clear text of error message
565
</pre>
566
567
h3. deleteAutorecEntry (Added in version 13)
568
569
Delete an existing autorec DVR entry from the database.
570
571
Request message fields:
572
<pre>
573
id                 str   required   Autorec DVR Entry ID (string!)
574
</pre>
575
576
Reply message fields:
577
<pre>
578
success            u32   required   1 if entry was removed
579
error              str   optional   Error message if the delete fails
580 1 Andreas Smas
</pre>
581 83 Jaroslav Kysela
582 1 Andreas Smas
----
583 117 Jaroslav Kysela
---
584 1 Andreas Smas
585 117 Jaroslav Kysela
h3. addTimerecEntry (Added in version 18)
586
587
Create a new Timerec DVR entry. Title must be specified.
588
589
Request message fields:
590
<pre>
591
title              str   required   Title for the recordings.
592 125 Jaroslav Kysela
directory          str   optional   Forced output directory name (Added in version 19).
593 117 Jaroslav Kysela
name               str   optional   Name for this timerec entry.
594
configName         str   optional   DVR Configuration Name / UUID.
595
channelId          u32   required   Channel ID.
596
daysOfWeek         u32   optional   Bitmask - Days of week (0x01 = Monday, 0x40 = Sunday, 0x7f = Whole Week, 0 = Not set).
597
priority           u32   optional   Priority (0 = Important, 1 = High, 2 = Normal, 3 = Low, 4 = Unimportant, 5 = Not set).
598
start              u32   required   Minutes from midnight (up to 24*60) for the start of the time window (including)
599
stop               u32   required   Minutes from modnight (up to 24*60) for the end of the time window (including, cross-noon allowed)
600
retention          u32   optional   Retention in days. 
601
comment            str   optional   User Comment.
602
</pre>
603
604
Reply message fields:
605
<pre>
606
success            u32   required   1 if entry was added, 0 otherwise
607
id                 str   optional   ID (string!) of created timerec DVR entry
608
error              str   optional   English clear text of error message
609
</pre>
610
611
h3. deleteTimerecEntry (Added in version 18)
612
613
Delete an existing timerec DVR entry from the database.
614
615
Request message fields:
616
<pre>
617
id                 str   required   Timerec DVR Entry ID (string!)
618
</pre>
619
620
Reply message fields:
621
<pre>
622
success            u32   required   1 if entry was removed
623
error              str   optional   Error message if the delete fails
624
</pre>
625
626
----
627
628 66 Adam Sutton
h3. getTicket (Added in version 5)
629 1 Andreas Smas
630 66 Adam Sutton
Get a ticket to allow access to a channel or recording via HTTP
631 1 Andreas Smas
632 66 Adam Sutton
Request message fields:
633 1 Andreas Smas
<pre>
634 66 Adam Sutton
channelId          u32  optional   Channel to gain access for
635
dvrId              u32  optional   DVR file to gain access for
636 1 Andreas Smas
</pre>
637
638
Reply message fields:
639
<pre>
640 66 Adam Sutton
path               str  required   The full path for access URL (no scheme, host or port)
641
ticket             str  required   The ticket to pass in the URL query string
642 1 Andreas Smas
</pre>
643
644 66 Adam Sutton
h3. subscribe
645 1 Andreas Smas
646 66 Adam Sutton
Request subscription to the given channel. 
647 1 Andreas Smas
648 66 Adam Sutton
Request message fields:
649
<pre>
650
channelId          u32   required   ID for channel. 
651
subscriptionId     u32   required   Subscription ID. Selected by client. This value is not interpreted by the server in any form. 
652
                                    The value is used from now on in all messages related to the subscription.
653 1 Andreas Smas
weight             u32   optional   Weighting of this subscription (same as recording priority).
654 73 Adam Sutton
90khz              u32   optional   Request PTS/DTS in default 90kHz timebase, default is 1MHz (Added in version 7)
655
normts             u32   optional   Request PTS/DTS normalisation (Added in version 7)
656
                                    Note: this will mean missing timestamps are added, first packet should be ~0 and will always be an i-frame.
657
                                    Note: this is implied if timeshiftPeriod is enabled
658 114 Jaroslav Kysela
                                    Note: from version 17, this is always enabled and this parameter is ignored.
659 73 Adam Sutton
queueDepth         u32   optional   Change the default packet queue lengths, default 500000 bytes (Added in version 7)
660
                                    Note: I-frame depth is 3*queueDepth, P-frame is 2*queueDepth and B-frame is queueDepth
661
timeshiftPeriod    u32   optional   The number of seconds to keep in the timeshift buffer (Added in version 9)
662
                                    Note: this may be bounded by server configuration settings
663 108 Jaroslav Kysela
profile            str   optional   Select stream profile (Added in version 16).
664 11 Andreas Smas
</pre>
665 66 Adam Sutton
666 1 Andreas Smas
Reply message fields:
667
<pre>
668 73 Adam Sutton
90khz              u32   optional   Indicates 90khz timestamps will be used
669
normts             u32   optional   Indicates timestamps will be normalised (and fixed)
670
timeshiftPeriod    u32   optional   The actual timeshiftPeriod to be used
671 66 Adam Sutton
</pre>
672 1 Andreas Smas
673 66 Adam Sutton
h3. unsubscribe
674
675
Stop a subscription.
676
677
Request message fields:
678 1 Andreas Smas
<pre>
679 66 Adam Sutton
subscriptionId     u32   required   Subscription ID.
680 58 sbi -
</pre>
681
682 11 Andreas Smas
Reply message fields:
683 1 Andreas Smas
<pre>
684 66 Adam Sutton
None
685 58 sbi -
</pre>
686 11 Andreas Smas
687 66 Adam Sutton
h3. subscriptionChangeWeight (Added in version 5)
688 1 Andreas Smas
689 66 Adam Sutton
Change the weight of an existing subscription
690 1 Andreas Smas
691 66 Adam Sutton
Request message fields:
692
<pre>
693
subscriptionId     u32   required   Subscription ID.
694
weight             u32   optional   The new subscription weight.
695 1 Andreas Smas
</pre>
696
697
Reply message fields:
698
<pre>
699 69 Adam Sutton
None
700 1 Andreas Smas
</pre>
701
702 73 Adam Sutton
h3. subscriptionSkip (Added in version 9)
703
704
Skip a timeshift enabled subscription. The response will be asynchronous subscriptionSkip().
705
706
Request message fields:
707
<pre>
708
subscriptionId     u32   required   Subscription ID.
709
absolute           u32   optional   The skip request is absolute
710
time               u64   optional   Specify skip using time (units are as for PTS)
711
size               u64   optional   Specify skip using size (Not currently used)
712
</pre>
713
714
Reply message fields:
715
<pre>
716
None
717
</pre>
718
719
h3. subscriptionSeek (Added in version 9)
720
721
Synonym for subscriptionSkip
722
723
h3. subscriptionSpeed (Added in version 9)
724
725
Set the playback speed for the subscription. The response will be asynchronous subscriptionSpeed().
726
727
Request message fields:
728
<pre>
729
subscriptionId     u32   required   Subscription ID.
730
speed              u32   required   Specify speed (0=pause, 100=1x fwd, -100=1x backward)
731
</pre>
732
733
Reply message fields:
734
<pre>
735
None
736
</pre>
737
738
h3. subscriptionLive (Added in version 9)
739
740
Return a timeshifted session to live. Reply will be asynchronous subscriptionSkip().
741
742
Request message fields:
743
<pre>
744
subscriptionId     u32   required   Subscription ID.
745
</pre>
746
747
Reply message fields:
748
<pre>
749
None
750 82 Jaroslav Kysela
</pre>
751 1 Andreas Smas
752 83 Jaroslav Kysela
h3. subscriptionFilterStream (Added in version 12)
753 1 Andreas Smas
754 83 Jaroslav Kysela
Enable or disable specified streams by index.
755
756
Request message fields:
757
<pre>
758
subscriptionId     u32        required   Subscription ID.
759
enable             list[u32]  optional   Enable stream indexes
760
disable            list[u32]  optional   Disable (filter out) stream indexes
761
</pre>
762
763
Reply message fields:
764 1 Andreas Smas
<pre>
765
None
766 109 Jaroslav Kysela
</pre>
767
768
---
769
770
h3. getProfiles (Added in version 16)
771
772
Return a list of stream profiles (configurations).
773
774
Reply message fields:
775
<pre>
776
profiles           msg[]      optional   Supported profiles
777
</pre>
778
779
Message fields:
780
<pre>
781
uuid               str        required   Profile ID
782
name               str        required   Profile Name
783
comment            str        required   Profile Comment
784 83 Jaroslav Kysela
</pre>
785
786
h3. getCodecs (Added in version 11, Removed in version 16)
787
788 82 Jaroslav Kysela
Return a list of encoders (codecs).
789
790 1 Andreas Smas
Reply message fields:
791 82 Jaroslav Kysela
<pre>
792 83 Jaroslav Kysela
encoders           list[str]  optional   Supported encoders
793 82 Jaroslav Kysela
</pre>
794
795 70 Adam Sutton
h3. fileOpen (Added in version 8)
796 69 Adam Sutton
797
Open a file within the Tvheadend file system. This is now the preferred method (in place of HTTP) for accessing recordings.
798
799
Accessing recordings via HTSP will overcome the limitations of standard HTTP streaming which cannot handle both skipping and growing files (i.e. in-progress recordings) at the same time.
800
801 1 Andreas Smas
Request message fields:
802 69 Adam Sutton
<pre>
803 70 Adam Sutton
file               str   required   File path to open
804 1 Andreas Smas
</pre>
805
806 70 Adam Sutton
Valid file paths:
807
<pre>
808
/dvrfile/ID        will open the file associated with DVR entry ID
809 74 Adam Sutton
/imagecache/ID     will open the file associated with imagecache entry ID (Note: only works for HTSPv10+)
810 70 Adam Sutton
</pre>
811
812 69 Adam Sutton
Reply message fields:
813
<pre>
814
id                 u32   required   The file handle used for further file operations
815
size               u64   optional   The size of the file in bytes
816 1 Andreas Smas
mtime              u64   optional   The last time the file was modified
817 69 Adam Sutton
</pre>
818
819 70 Adam Sutton
h3. fileRead (Added in version 8)
820 69 Adam Sutton
821 1 Andreas Smas
Read data from a file.
822
823 69 Adam Sutton
Request message fields:
824
<pre>
825
id                 u32   required   The file handle used for further file operations
826 70 Adam Sutton
size               u64   required   The amount of data to read
827
offset             u64   optional   Offset into the file to read (default is current position)
828 69 Adam Sutton
</pre>
829 1 Andreas Smas
830 69 Adam Sutton
Reply message fields:
831
<pre>
832
data               bin   required   The data read from the file (size may be less than requested)
833
</pre>
834
835 70 Adam Sutton
h3. fileClose (Added in version 8)
836 69 Adam Sutton
837
Close an opened file.
838
839
Request message fields:
840
<pre>
841 1 Andreas Smas
id                 u32   required   The file handle to be closed
842 69 Adam Sutton
</pre>
843
844
Reply message fields:
845
<pre>
846
None
847
</pre>
848 70 Adam Sutton
849 69 Adam Sutton
h3. fileStat (Added in version 8)
850
851
Get status of a file.
852
853
Request message fields:
854
<pre>
855
id                 u32   required   The file handle to be stat'd
856 1 Andreas Smas
</pre>
857
858
Reply message fields:
859
<pre>
860
size               u64   optional   The size of the file in bytes
861
mtime              u64   optional   The last time the file was modified
862
</pre>
863 70 Adam Sutton
864
h3. fileSeek (Added in version 8)
865
866
Seek to position in a file.
867
868
Request message fields:
869
<pre>
870
id                 u32   required   The file handle to be stat'd
871
offset             u64   required   The position to seek in the file
872
whence             str   required   Where to seek relative to (default=SEEK_SET)
873
</pre>
874
875
Note: valid values for whence
876
<pre>
877
SEEK_SET           Seek relative to start of file
878
SEEK_CUR           Seek relative to current position in file
879 72 Adam Sutton
SEEK_END           Seek relative (backwards) to end of file
880 70 Adam Sutton
</pre>
881
882
Reply message fields:
883
<pre>
884
offset             u64   optional   The new absolute position within the file
885
</pre>
886 66 Adam Sutton
887 1 Andreas Smas
h1. Server to Client methods
888
889
----
890
891
h3. channelAdd
892
893
A new channel has been created on the server.
894
895
Message fields:
896
<pre>
897
channelId          u32   required   ID of channel.
898 66 Adam Sutton
channelNumber      u32   required   Channel number, 0 means unconfigured.
899 90 Jaroslav Kysela
channelNumberMinor u32   optional   Minor channel number (Added in version 13).
900 1 Andreas Smas
channelName        str   required   Name of channel.
901 70 Adam Sutton
channelIcon        str   optional   URL to an icon representative for the channel
902
                                    (For v8+ clients this could be a relative /imagecache/ID URL
903 73 Adam Sutton
                                     intended to be fed to fileOpen() or HTTP server)
904 104 Jaroslav Kysela
                                    (For v15+ clients this could be a relative imagecache/ID URL
905
                                     intended to be fed to fileOpen() or HTTP server)
906 66 Adam Sutton
eventId            u32   optional   ID of the current event on this channel.
907
nextEventId        u32   optional   ID of the next event on the channel.
908
tags               u32[] optional   Tags this channel is mapped to.
909
services           msg[] optional   List of available services (Added in version 5)
910 13 Andreas Smas
</pre>
911 1 Andreas Smas
912 66 Adam Sutton
Service fields:
913 1 Andreas Smas
<pre>
914 66 Adam Sutton
name               str   required   Service name
915
type               str   required   Service type
916
caid               u32   optional   Encryption CA ID
917
caname             str   optional   Encryption CA name
918 11 Andreas Smas
</pre>
919 1 Andreas Smas
920 66 Adam Sutton
h3. channelUpdate
921 11 Andreas Smas
922 66 Adam Sutton
Same as channelAdd, but all fields (except channelId) are optional.
923
924 58 sbi -
h3. channelDelete
925 1 Andreas Smas
926
A channel has been deleted on the server.
927 58 sbi -
928
Message fields:
929 1 Andreas Smas
<pre>
930
channelId          u32   required   ID of channel.
931
</pre>
932
933
----
934
935 11 Andreas Smas
h3. tagAdd
936 1 Andreas Smas
937
A new tag has been created on the server.
938
939
Message fields:
940
<pre>
941 66 Adam Sutton
tagId              u32   required   ID of tag.
942
tagName            str   required   Name of tag.
943 117 Jaroslav Kysela
tagIndex           u32   optional   Index value for sorting (default by from min to max) (Added in version 18).
944 66 Adam Sutton
tagIcon            str   optional   URL to an icon representative for the channel.
945
tagTitledIcon      u32   optional   Icon includes a title
946 1 Andreas Smas
members            u32[] optional   Channel IDs of those that belong to the tag
947 11 Andreas Smas
</pre>
948 39 elupus -
949 58 sbi -
h3. tagUpdate
950 66 Adam Sutton
951 11 Andreas Smas
Same as tagAdd, but all fields (except tagId) are optional.
952
953 1 Andreas Smas
h3. tagDelete
954 58 sbi -
955 1 Andreas Smas
A tag has been deleted from the server.
956
957
Message fields:
958 66 Adam Sutton
<pre>
959 58 sbi -
tagId              u32   required   ID of tag.
960
</pre>
961 12 Andreas Smas
962 1 Andreas Smas
----
963 66 Adam Sutton
964 58 sbi -
h3. dvrEntryAdd (Added in version 4)
965 1 Andreas Smas
966 58 sbi -
A new recording has been created on the server.
967 1 Andreas Smas
968 2 Andreas Smas
Message fields:
969 66 Adam Sutton
<pre>
970
id                 u32   required   ID of dvrEntry.
971
channel            u32   required   Channel of dvrEntry.
972
start              s64   required   Time of when this entry was scheduled to start recording.
973 89 Jaroslav Kysela
stop               s64   required   Time of when this entry was scheduled to stop recording.
974
startExtra         s64   required   Extra start time (pre-time) in minutes (Added in version 13).
975 1 Andreas Smas
stopExtra          s64   required   Extra stop time (post-time) in minutes (Added in version 13).
976
retention          s64   required   DVR Entry retention time in days.
977 89 Jaroslav Kysela
priority           u32   required   Priority (0 = Important, 1 = High, 2 = Normal, 3 = Low, 4 = Unimportant, 5 = Not set) (Added in version 13).
978
eventId            u32   optional   Associated EPG Event ID (Added in version 13).
979 117 Jaroslav Kysela
autorecId          str   optional   Associated Autorec UUID (Added in version 13).
980
timerecId          str   optional   Associated Timerec UUID (Added in version 18).
981 89 Jaroslav Kysela
contentType        u32   optional   Content Type (like in the DVB standard) (Added in version 13).
982 66 Adam Sutton
title              str   optional   Title of recording
983 1 Andreas Smas
summary            str   optional   Short description of the recording (Added in version 6).
984
description        str   optional   Long description of the recording.
985 66 Adam Sutton
state              str   required   Recording state
986
error              str   optional   Plain english error description (e.g. "Aborted by user").
987 117 Jaroslav Kysela
owner              str   optional   Name of the entry owner (Added in version 18).
988
creator            str   optional   Name of the entry creator (Added in version 18).
989 1 Andreas Smas
</pre>
990 66 Adam Sutton
991 48 mdd -
TODO: recording states
992
993
h3. dvrEntryUpdate
994 66 Adam Sutton
995
Message fields:
996
<pre>
997
Same as dvrEntryAdd, but all fields (except id) are optional.
998 51 elupus -
</pre>
999 66 Adam Sutton
1000 58 sbi -
h3. dvrEntryDelete (Added in version 4)
1001 66 Adam Sutton
1002 58 sbi -
A recording has been deleted from the server.
1003 48 mdd -
1004
Message fields:
1005 66 Adam Sutton
<pre>
1006 1 Andreas Smas
id                 u32   required   ID of recording to delete.
1007 48 mdd -
</pre>
1008 58 sbi -
1009 48 mdd -
----
1010 95 Jaroslav Kysela
1011
h3. autorecEntryAdd (Added in version 13)
1012
1013
A new autorec recording has been created on the server.
1014
1015 1 Andreas Smas
Message fields:
1016 95 Jaroslav Kysela
<pre>
1017
id                 str   required   ID (string!) of dvrAutorecEntry.
1018
enabled            u32   required   If autorec entry is enabled (activated).
1019 117 Jaroslav Kysela
name               str   required   Name of the autorec entry (Added in version 18).
1020 95 Jaroslav Kysela
minDuration        u32   required   Minimal duration in seconds (0 = Any).
1021
maxDuration        u32   required   Maximal duration in seconds (0 = Any).
1022
retention          u32   required   Retention time (in days).
1023
daysOfWeek         u32   required   Bitmask - Days of week (0x01 = Monday, 0x40 = Sunday, 0x7f = Whole Week, 0 = Not set).
1024
priority           u32   required   Priority (0 = Important, 1 = High, 2 = Normal, 3 = Low, 4 = Unimportant, 5 = Not set).
1025
approxTime         u32   required   Minutes from midnight (up to 24*60).
1026 1 Andreas Smas
startExtra         s64   required   Extra start minutes (pre-time).
1027
stopExtra          s64   required   Extra stop minutes (post-time).
1028 95 Jaroslav Kysela
title              str   optional   Title.
1029 122 Jaroslav Kysela
directory          str   optional   Forced directory name (Added in version 19).
1030 95 Jaroslav Kysela
channel            u32   optional   Channel ID.
1031 117 Jaroslav Kysela
owner              str   optional   Owner of this autorec entry (Added in version 18).
1032
creator            str   optional   Creator of this autorec entry (Added in version 18).
1033 95 Jaroslav Kysela
</pre>
1034 1 Andreas Smas
1035 95 Jaroslav Kysela
h3. autorecEntryUpdate (Added in version 13)
1036
1037
Message fields:
1038
<pre>
1039 117 Jaroslav Kysela
Same as autorecEntryAdd but all fields (except id) are optional.
1040 95 Jaroslav Kysela
</pre>
1041
1042 1 Andreas Smas
h3. autorecEntryDelete (Added in version 13)
1043
1044
Message fields:
1045
<pre>
1046
id                 str   required   Autorec Entry ID (string!)
1047 117 Jaroslav Kysela
</pre>
1048
1049
----
1050
1051 118 Jaroslav Kysela
h3. timerecEntryAdd (Added in version 18)
1052 117 Jaroslav Kysela
1053
A new autorec recording has been created on the server.
1054
1055
Message fields:
1056
<pre>
1057
title              str   required   Title for the recordings.
1058 123 Jaroslav Kysela
directory          str   optional   Forced directory name (Added in version 19).
1059 117 Jaroslav Kysela
enabled            u32   required   Title for the recordings.
1060
name               str   required   Name for this timerec entry.
1061
configName         str   required   DVR Configuration Name / UUID.
1062
channelId          u32   required   Channel ID.
1063
daysOfWeek         u32   optional   Bitmask - Days of week (0x01 = Monday, 0x40 = Sunday, 0x7f = Whole Week, 0 = Not set).
1064
priority           u32   optional   Priority (0 = Important, 1 = High, 2 = Normal, 3 = Low, 4 = Unimportant, 5 = Not set).
1065
start              u32   required   Minutes from midnight (up to 24*60) for the start of the time window (including)
1066
stop               u32   required   Minutes from modnight (up to 24*60) for the end of the time window (including, cross-noon allowed)
1067
retention          u32   optional   Retention in days. 
1068
comment            str   optional   User Comment.
1069
owner              str   optional   Owner of this timerec entry.
1070
creator            str   optional   Creator of this timerec entry.
1071
</pre>
1072
1073
h3. timerecEntryUpdate (Added in version 18)
1074
1075
Message fields:
1076
<pre>
1077
Same as timerecEntryAdd but all fields (except id) are optional.
1078
</pre>
1079
1080
h3. timerecEntryDelete (Added in version 18)
1081
1082
Message fields:
1083
<pre>
1084
id                 str   required   Timerec Entry ID (string!)
1085 95 Jaroslav Kysela
</pre>
1086
1087
----
1088
1089 66 Adam Sutton
h3. eventAdd (Added in version 6)
1090 48 mdd -
1091 66 Adam Sutton
Message fields:
1092
<pre>
1093
eventId            u32   required   Event ID
1094
channelId          u32   required   The channel this event is related to.
1095
start              u64   required   Start time of event, UNIX time.
1096
stop               u64   required   Ending time of event, UNIX time.
1097
title              str   optional   Title of event.
1098
summary            str   optional   Short description of the event (Added in version 6).
1099
description        str   optional   Long description of the event.
1100
serieslinkId       u32   optional   Series Link ID (Added in version 6).
1101
episodeId          u32   optional   Episode ID (Added in version 6).
1102
seasonId           u32   optional   Season ID (Added in version 6).
1103
brandId            u32   optional   Brand ID (Added in version 6).
1104
contentType        u32   optional   DVB content code (Added in version 4, Modified in version 6*).
1105
ageRating          u32   optional   Minimum age rating (Added in version 6).
1106
starRating         u32   optional   Star rating (1-5) (Added in version 6).
1107
firstAired         s64   optional   Original broadcast time, UNIX time (Added in version 6).
1108
seasonNumber       u32   optional   Season number (Added in version 6).
1109
seasonCount        u32   optional   Show season count (Added in version 6).
1110
episodeNumber      u32   optional   Episode number (Added in version 6).
1111
episodeCount       u32   optional   Season episode count (Added in version 6).
1112
partNumber         u32   optional   Multi-part episode part number (Added in version 6).
1113
partCount          u32   optional   Multi-part episode part count (Added in version 6).
1114
episodeOnscreen    str   optional   Textual representation of episode number (Added in version 6).
1115
image              str   optional   URL to a still capture from the episode (Added in version 6).
1116
dvrId              u32   optional   ID of a recording (Added in version 5).
1117
nextEventId        u32   optional   ID of next event on the same channel.
1118
</pre>
1119 48 mdd -
1120 66 Adam Sutton
* *contentType previously had the major DVB category in the bottom 4 bits, 
1121
  however in v6 this has been changed to properly match DVB, so top 4 bits
1122
  as major category and bottom 4 bits has sub-category. Clients requesting
1123
  v5 or lower will get the old output.
1124 48 mdd -
1125 66 Adam Sutton
h3. eventUpdate (Added in version 6)
1126 35 Andreas Smas
1127 58 sbi -
Message fields:
1128
<pre>
1129 66 Adam Sutton
Same as eventAdd but all fields (except eventId) are optional.
1130 35 Andreas Smas
</pre>
1131 58 sbi -
1132 77 John Törnblom
h3. eventDelete (Added in version 6)
1133 35 Andreas Smas
1134 66 Adam Sutton
Message fields:
1135
<pre>
1136
eventId            u32   required   Event ID
1137
</pre>
1138 14 Andreas Smas
1139 66 Adam Sutton
---
1140 14 Andreas Smas
1141 66 Adam Sutton
h3. initialSyncCompleted (Added in version 2)
1142 14 Andreas Smas
1143 66 Adam Sutton
Sent after all the initial metadata has been sent when session has been set to async mode.
1144 38 Andreas Smas
1145
Message fields:
1146 14 Andreas Smas
<pre>
1147
</pre>
1148
1149
----
1150
1151
h3. subscriptionStart
1152 53 Andreas Smas
1153 66 Adam Sutton
Asynchronous message output when a new subscription is successfully started.
1154 14 Andreas Smas
1155
Message fields:
1156 1 Andreas Smas
<pre>
1157 66 Adam Sutton
subscriptionId     u32   required   Subscription ID.
1158
streams            msg[] required   Array of messages with stream information
1159
sourceinfo         msg   optional   Source information.
1160
</pre>
1161 37 Andreas Smas
1162 66 Adam Sutton
Stream message fields:
1163
<pre>
1164
index              u32   required   Index for this stream
1165
type               str   required   Type of stream
1166 113 Jaroslav Kysela
meta               bin   optional   Codec metadata (private data, libav - extradata) (Added in version 17)
1167 66 Adam Sutton
language           str   optional   Language for stream
1168
Video components only:
1169
width              u32   optional   Width of video in pixels
1170
height             u32   optional   Height of video in pixels
1171 68 Andreas Smas
aspect_num         u32   optional   Aspect ratio numerator (Added in version 5) *Can be incorrect and should not be relied upon*
1172
aspect_den         u32   optional   Aspect ratio denonminator (Added in version 5) *Can be incorrect and should not be relied upon*
1173 66 Adam Sutton
Audio components only:
1174 76 Dave Chapman
audio_type         u32   optional   Audio type - 0=Normal; 1=Clean effects; 2=Hearing impaired; 3=Visually impaired commentary; 4-255=Reserved (Added in version 11)
1175 66 Adam Sutton
channels           u32   optional   Number of audio channels (Added in version 5)
1176
rate               u32   optional   Audio bitrate (Added in version 5)
1177
Subtitle components only:
1178
composition_id     u32   optional   ??? (Added in version 5)
1179
ancillary_id       u32   optional   ??? (Added in version 5)
1180
</pre>
1181 2 Andreas Smas
1182 66 Adam Sutton
Sourceinfo message fields:
1183
<pre>
1184
adapter            str   optional   Adapter name
1185
mux                str   optional   Transponder name
1186
network            str   optional   Network name
1187
provider           str   optional   ???
1188
service            str   optional   Service name
1189
</pre>
1190 15 Andreas Smas
1191 66 Adam Sutton
Video Stream types:
1192 1 Andreas Smas
<pre>
1193 79 Jaroslav Kysela
MPEG2VIDEO                    MPEG2 video, meta field is present (configuration blocks)
1194
H264                          H264 video, meta field is present (configuration blocks)
1195
HEVC                          HEVC video, meta field is present (configuration blocks)
1196 66 Adam Sutton
</pre>
1197 15 Andreas Smas
1198 1 Andreas Smas
Audio Stream types:
1199
<pre>
1200 66 Adam Sutton
MPEG2AUDIO                    MPEG2 audio (MP2)
1201
AC3                           AC3 audio
1202 79 Jaroslav Kysela
AAC                           ADTS framed AAC (one AAC packet per ADTS frame), meta field is present (MPEG4 config)
1203 66 Adam Sutton
EAC3                          Enhanced AC3 audio
1204 79 Jaroslav Kysela
VORBIS                        Vorbis audio, meta field is present with the main vorbis header
1205 16 Andreas Smas
</pre>
1206
1207 66 Adam Sutton
Subtitle Stream types:
1208
<pre>
1209
TELETEXT                      ???
1210
DVBSUB                        ???
1211
</pre>
1212 55 Lars Op den Kamp -
1213 112 Jaroslav Kysela
h3. subscriptionGrace
1214
1215
Notifies client about the grace timeout (timeout for stream activation). It can be issues multiple times.
1216
For example a configuration with satellite rotors requires more than 120 seconds to tune, so users
1217
should be notified..
1218
1219
Message fields:
1220
<pre>
1221
subscriptionId     u32   required   Subscription ID.
1222
graceTimeout       u32   required   Grace timeout in seconds.
1223
</pre>
1224
1225 55 Lars Op den Kamp -
h3. subscriptionStop
1226
1227 66 Adam Sutton
A subscription has been stopped.
1228 55 Lars Op den Kamp -
1229
Message fields:
1230
<pre>
1231 66 Adam Sutton
subscriptionId     u32   required   Subscription ID.
1232 1 Andreas Smas
status             str   optional   Error message if subscription stopped unexpectedly.
1233
</pre>
1234
1235 73 Adam Sutton
h3. subscriptionSkip (Added version 9)
1236
1237
A subscription has been skipped.
1238
1239
Message fields:
1240
<pre>
1241
subscriptionId     u32   required   Subscription ID.
1242
error              u32   optional   The last skip command caused an error.
1243
absolute           u32   optional   Indicates the output is absolute (Note: should always be 1 at the moment)
1244
time               u64   optional   The time the subscription has skipped to.
1245
size               u64   optional   The position in the file we've skipped to (Note: not currently used).
1246
</pre>
1247
1248
h3. subscriptionSpeed (Added version 9)
1249
1250
A subscription's playback speed has changed.
1251
1252
This can happen even without a speed request, should playback reach either end of the buffer.
1253
1254
Message fields:
1255
<pre>
1256
subscriptionId     u32   required   Subscription ID.
1257
speed              u32   required   The new speed of the subscription
1258
</pre>
1259
1260 55 Lars Op den Kamp -
h3. subscriptionStatus
1261
1262 66 Adam Sutton
Subscription status update.
1263 58 sbi -
1264
Message fields:
1265
<pre>
1266 66 Adam Sutton
subscriptionId     u32   required   Subscription ID.
1267
status             str   optional   English clear text of error status. Absence of this field means that the status is OK. 
1268 16 Andreas Smas
</pre>
1269 58 sbi -
1270 16 Andreas Smas
h3. queueStatus
1271
1272 1 Andreas Smas
The queueStatus message is sent every second during normal data delivery.
1273 60 John Törnblom
1274
The transmit scheduler have different drop thresholds for different frame types.
1275 66 Adam Sutton
1276 1 Andreas Smas
If congestion occurs it will favor dropping B-frames before P-frames before I-frames.
1277
All audio is recognized as I-frames. 
1278 58 sbi -
1279 1 Andreas Smas
Message fields:
1280
<pre>
1281 66 Adam Sutton
subscriptionId     u32   required   Subscription ID.
1282
packets            u32   required   Number of data packets in queue.
1283
bytes              u32   required   Number of bytes in queue.
1284
delay              u32   optional   Estimated delay of queue (in µs).
1285 1 Andreas Smas
Bdrops             u32   required   Number of B-frames dropped
1286 66 Adam Sutton
Pdrops             u32   required   Number of P-frames dropped
1287
Idrops             u32   required   Number of I-frames dropped
1288 73 Adam Sutton
delay              s64   required   Delta between first and last DTS (Added in version 9)
1289 1 Andreas Smas
</pre>
1290
1291
h3. signalStatus
1292
1293
The signalStatus message is sent every second during normal data delivery.
1294
1295
The optional fields may not have been implemented or may not be supported by the active adapter.
1296
1297
Message fields:
1298
<pre>
1299 66 Adam Sutton
subscriptionId     u32   required   Subscription ID.
1300
feStatus           str   required   Frontend status.
1301
feSNR              u32   optional   Signal to noise ratio.
1302 1 Andreas Smas
feSignal           u32   optional   Signal status percentage.
1303
feBER              u32   optional   Bit error rate.
1304
feUNC              u32   optional   Uncorrected blocks.
1305 73 Adam Sutton
</pre>
1306
1307
h3. timeshiftStatus
1308
1309
Provide status every second about the timeshift buffer.
1310
1311
Message fields:
1312
<pre>
1313
subscriptionId     u32   required   Subscription ID.
1314
full               u32   required   Indicates whether the buffer is full
1315
shift              s64   required   Current position relative to live
1316
start              s64   optional   PTS of the first frame in the buffer
1317
end                s64   optional   PTS of the last frame in the buffer
1318 1 Andreas Smas
</pre>
1319
1320
h3. muxpkt
1321
1322
Streaming data.
1323
1324
Message fields:
1325
<pre>
1326 66 Adam Sutton
subscriptionId     u32   required   Subscription ID.
1327
frametype          u32   required   Type of frame as ASCII value: 'I', 'P', 'B'
1328
stream             u32   required   Stream index. Corresponds to the streams reported in the subscriptionStart message.
1329
dts                s64   optional   Decode Time Stamp in µs.
1330
pts                s64   optional   Presentation Time Stamp in µs.
1331
duration           u32   required   Duration of frame in µs.
1332
payload            bin   required   Actual frame data.
1333 1 Andreas Smas
</pre>