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Htsp » History » Version 128

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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enabled            u32   optional   Enabled flag (Added in version 19).
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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
564
id                 str   optional   ID (string!) of created autorec DVR entry
565
error              str   optional   English clear text of error message
566
</pre>
567
568
h3. deleteAutorecEntry (Added in version 13)
569
570
Delete an existing autorec DVR entry from the database.
571
572
Request message fields:
573
<pre>
574
id                 str   required   Autorec DVR Entry ID (string!)
575
</pre>
576
577
Reply message fields:
578
<pre>
579
success            u32   required   1 if entry was removed
580
error              str   optional   Error message if the delete fails
581 1 Andreas Smas
</pre>
582 83 Jaroslav Kysela
583 1 Andreas Smas
----
584 117 Jaroslav Kysela
---
585 1 Andreas Smas
586 117 Jaroslav Kysela
h3. addTimerecEntry (Added in version 18)
587
588
Create a new Timerec DVR entry. Title must be specified.
589
590
Request message fields:
591
<pre>
592
title              str   required   Title for the recordings.
593 125 Jaroslav Kysela
directory          str   optional   Forced output directory name (Added in version 19).
594 117 Jaroslav Kysela
name               str   optional   Name for this timerec entry.
595
configName         str   optional   DVR Configuration Name / UUID.
596
channelId          u32   required   Channel ID.
597
daysOfWeek         u32   optional   Bitmask - Days of week (0x01 = Monday, 0x40 = Sunday, 0x7f = Whole Week, 0 = Not set).
598
priority           u32   optional   Priority (0 = Important, 1 = High, 2 = Normal, 3 = Low, 4 = Unimportant, 5 = Not set).
599
start              u32   required   Minutes from midnight (up to 24*60) for the start of the time window (including)
600
stop               u32   required   Minutes from modnight (up to 24*60) for the end of the time window (including, cross-noon allowed)
601
retention          u32   optional   Retention in days. 
602
comment            str   optional   User Comment.
603
</pre>
604
605
Reply message fields:
606
<pre>
607
success            u32   required   1 if entry was added, 0 otherwise
608
id                 str   optional   ID (string!) of created timerec DVR entry
609
error              str   optional   English clear text of error message
610
</pre>
611
612
h3. deleteTimerecEntry (Added in version 18)
613
614
Delete an existing timerec DVR entry from the database.
615
616
Request message fields:
617
<pre>
618
id                 str   required   Timerec DVR Entry ID (string!)
619
</pre>
620
621
Reply message fields:
622
<pre>
623
success            u32   required   1 if entry was removed
624
error              str   optional   Error message if the delete fails
625
</pre>
626
627
----
628
629 66 Adam Sutton
h3. getTicket (Added in version 5)
630 1 Andreas Smas
631 66 Adam Sutton
Get a ticket to allow access to a channel or recording via HTTP
632 1 Andreas Smas
633 66 Adam Sutton
Request message fields:
634 1 Andreas Smas
<pre>
635 66 Adam Sutton
channelId          u32  optional   Channel to gain access for
636
dvrId              u32  optional   DVR file to gain access for
637 1 Andreas Smas
</pre>
638
639
Reply message fields:
640
<pre>
641 66 Adam Sutton
path               str  required   The full path for access URL (no scheme, host or port)
642
ticket             str  required   The ticket to pass in the URL query string
643 1 Andreas Smas
</pre>
644
645 66 Adam Sutton
h3. subscribe
646 1 Andreas Smas
647 66 Adam Sutton
Request subscription to the given channel. 
648 1 Andreas Smas
649 66 Adam Sutton
Request message fields:
650
<pre>
651
channelId          u32   required   ID for channel. 
652
subscriptionId     u32   required   Subscription ID. Selected by client. This value is not interpreted by the server in any form. 
653
                                    The value is used from now on in all messages related to the subscription.
654 1 Andreas Smas
weight             u32   optional   Weighting of this subscription (same as recording priority).
655 73 Adam Sutton
90khz              u32   optional   Request PTS/DTS in default 90kHz timebase, default is 1MHz (Added in version 7)
656
normts             u32   optional   Request PTS/DTS normalisation (Added in version 7)
657
                                    Note: this will mean missing timestamps are added, first packet should be ~0 and will always be an i-frame.
658
                                    Note: this is implied if timeshiftPeriod is enabled
659 114 Jaroslav Kysela
                                    Note: from version 17, this is always enabled and this parameter is ignored.
660 73 Adam Sutton
queueDepth         u32   optional   Change the default packet queue lengths, default 500000 bytes (Added in version 7)
661
                                    Note: I-frame depth is 3*queueDepth, P-frame is 2*queueDepth and B-frame is queueDepth
662
timeshiftPeriod    u32   optional   The number of seconds to keep in the timeshift buffer (Added in version 9)
663
                                    Note: this may be bounded by server configuration settings
664 108 Jaroslav Kysela
profile            str   optional   Select stream profile (Added in version 16).
665 11 Andreas Smas
</pre>
666 66 Adam Sutton
667 1 Andreas Smas
Reply message fields:
668
<pre>
669 73 Adam Sutton
90khz              u32   optional   Indicates 90khz timestamps will be used
670
normts             u32   optional   Indicates timestamps will be normalised (and fixed)
671
timeshiftPeriod    u32   optional   The actual timeshiftPeriod to be used
672 66 Adam Sutton
</pre>
673 1 Andreas Smas
674 66 Adam Sutton
h3. unsubscribe
675
676
Stop a subscription.
677
678
Request message fields:
679 1 Andreas Smas
<pre>
680 66 Adam Sutton
subscriptionId     u32   required   Subscription ID.
681 58 sbi -
</pre>
682
683 11 Andreas Smas
Reply message fields:
684 1 Andreas Smas
<pre>
685 66 Adam Sutton
None
686 58 sbi -
</pre>
687 11 Andreas Smas
688 66 Adam Sutton
h3. subscriptionChangeWeight (Added in version 5)
689 1 Andreas Smas
690 66 Adam Sutton
Change the weight of an existing subscription
691 1 Andreas Smas
692 66 Adam Sutton
Request message fields:
693
<pre>
694
subscriptionId     u32   required   Subscription ID.
695
weight             u32   optional   The new subscription weight.
696 1 Andreas Smas
</pre>
697
698
Reply message fields:
699
<pre>
700 69 Adam Sutton
None
701 1 Andreas Smas
</pre>
702
703 73 Adam Sutton
h3. subscriptionSkip (Added in version 9)
704
705
Skip a timeshift enabled subscription. The response will be asynchronous subscriptionSkip().
706
707
Request message fields:
708
<pre>
709
subscriptionId     u32   required   Subscription ID.
710
absolute           u32   optional   The skip request is absolute
711
time               u64   optional   Specify skip using time (units are as for PTS)
712
size               u64   optional   Specify skip using size (Not currently used)
713
</pre>
714
715
Reply message fields:
716
<pre>
717
None
718
</pre>
719
720
h3. subscriptionSeek (Added in version 9)
721
722
Synonym for subscriptionSkip
723
724
h3. subscriptionSpeed (Added in version 9)
725
726
Set the playback speed for the subscription. The response will be asynchronous subscriptionSpeed().
727
728
Request message fields:
729
<pre>
730
subscriptionId     u32   required   Subscription ID.
731
speed              u32   required   Specify speed (0=pause, 100=1x fwd, -100=1x backward)
732
</pre>
733
734
Reply message fields:
735
<pre>
736
None
737
</pre>
738
739
h3. subscriptionLive (Added in version 9)
740
741
Return a timeshifted session to live. Reply will be asynchronous subscriptionSkip().
742
743
Request message fields:
744
<pre>
745
subscriptionId     u32   required   Subscription ID.
746
</pre>
747
748
Reply message fields:
749
<pre>
750
None
751 82 Jaroslav Kysela
</pre>
752 1 Andreas Smas
753 83 Jaroslav Kysela
h3. subscriptionFilterStream (Added in version 12)
754 1 Andreas Smas
755 83 Jaroslav Kysela
Enable or disable specified streams by index.
756
757
Request message fields:
758
<pre>
759
subscriptionId     u32        required   Subscription ID.
760
enable             list[u32]  optional   Enable stream indexes
761
disable            list[u32]  optional   Disable (filter out) stream indexes
762
</pre>
763
764
Reply message fields:
765 1 Andreas Smas
<pre>
766
None
767 109 Jaroslav Kysela
</pre>
768
769
---
770
771
h3. getProfiles (Added in version 16)
772
773
Return a list of stream profiles (configurations).
774
775
Reply message fields:
776
<pre>
777
profiles           msg[]      optional   Supported profiles
778
</pre>
779
780
Message fields:
781
<pre>
782
uuid               str        required   Profile ID
783
name               str        required   Profile Name
784
comment            str        required   Profile Comment
785 83 Jaroslav Kysela
</pre>
786
787
h3. getCodecs (Added in version 11, Removed in version 16)
788
789 82 Jaroslav Kysela
Return a list of encoders (codecs).
790
791 1 Andreas Smas
Reply message fields:
792 82 Jaroslav Kysela
<pre>
793 83 Jaroslav Kysela
encoders           list[str]  optional   Supported encoders
794 82 Jaroslav Kysela
</pre>
795
796 70 Adam Sutton
h3. fileOpen (Added in version 8)
797 69 Adam Sutton
798
Open a file within the Tvheadend file system. This is now the preferred method (in place of HTTP) for accessing recordings.
799
800
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.
801
802 1 Andreas Smas
Request message fields:
803 69 Adam Sutton
<pre>
804 70 Adam Sutton
file               str   required   File path to open
805 1 Andreas Smas
</pre>
806
807 70 Adam Sutton
Valid file paths:
808
<pre>
809
/dvrfile/ID        will open the file associated with DVR entry ID
810 74 Adam Sutton
/imagecache/ID     will open the file associated with imagecache entry ID (Note: only works for HTSPv10+)
811 70 Adam Sutton
</pre>
812
813 69 Adam Sutton
Reply message fields:
814
<pre>
815
id                 u32   required   The file handle used for further file operations
816
size               u64   optional   The size of the file in bytes
817 1 Andreas Smas
mtime              u64   optional   The last time the file was modified
818 69 Adam Sutton
</pre>
819
820 70 Adam Sutton
h3. fileRead (Added in version 8)
821 69 Adam Sutton
822 1 Andreas Smas
Read data from a file.
823
824 69 Adam Sutton
Request message fields:
825
<pre>
826
id                 u32   required   The file handle used for further file operations
827 70 Adam Sutton
size               u64   required   The amount of data to read
828
offset             u64   optional   Offset into the file to read (default is current position)
829 69 Adam Sutton
</pre>
830 1 Andreas Smas
831 69 Adam Sutton
Reply message fields:
832
<pre>
833
data               bin   required   The data read from the file (size may be less than requested)
834
</pre>
835
836 70 Adam Sutton
h3. fileClose (Added in version 8)
837 69 Adam Sutton
838
Close an opened file.
839
840
Request message fields:
841
<pre>
842 1 Andreas Smas
id                 u32   required   The file handle to be closed
843 69 Adam Sutton
</pre>
844
845
Reply message fields:
846
<pre>
847
None
848
</pre>
849 70 Adam Sutton
850 69 Adam Sutton
h3. fileStat (Added in version 8)
851
852
Get status of a file.
853
854
Request message fields:
855
<pre>
856
id                 u32   required   The file handle to be stat'd
857 1 Andreas Smas
</pre>
858
859
Reply message fields:
860
<pre>
861
size               u64   optional   The size of the file in bytes
862
mtime              u64   optional   The last time the file was modified
863
</pre>
864 70 Adam Sutton
865
h3. fileSeek (Added in version 8)
866
867
Seek to position in a file.
868
869
Request message fields:
870
<pre>
871
id                 u32   required   The file handle to be stat'd
872
offset             u64   required   The position to seek in the file
873
whence             str   required   Where to seek relative to (default=SEEK_SET)
874
</pre>
875
876
Note: valid values for whence
877
<pre>
878
SEEK_SET           Seek relative to start of file
879
SEEK_CUR           Seek relative to current position in file
880 72 Adam Sutton
SEEK_END           Seek relative (backwards) to end of file
881 70 Adam Sutton
</pre>
882
883
Reply message fields:
884
<pre>
885
offset             u64   optional   The new absolute position within the file
886
</pre>
887 66 Adam Sutton
888 1 Andreas Smas
h1. Server to Client methods
889
890
----
891
892
h3. channelAdd
893
894
A new channel has been created on the server.
895
896
Message fields:
897
<pre>
898
channelId          u32   required   ID of channel.
899 66 Adam Sutton
channelNumber      u32   required   Channel number, 0 means unconfigured.
900 90 Jaroslav Kysela
channelNumberMinor u32   optional   Minor channel number (Added in version 13).
901 1 Andreas Smas
channelName        str   required   Name of channel.
902 70 Adam Sutton
channelIcon        str   optional   URL to an icon representative for the channel
903
                                    (For v8+ clients this could be a relative /imagecache/ID URL
904 73 Adam Sutton
                                     intended to be fed to fileOpen() or HTTP server)
905 104 Jaroslav Kysela
                                    (For v15+ clients this could be a relative imagecache/ID URL
906
                                     intended to be fed to fileOpen() or HTTP server)
907 66 Adam Sutton
eventId            u32   optional   ID of the current event on this channel.
908
nextEventId        u32   optional   ID of the next event on the channel.
909
tags               u32[] optional   Tags this channel is mapped to.
910
services           msg[] optional   List of available services (Added in version 5)
911 13 Andreas Smas
</pre>
912 1 Andreas Smas
913 66 Adam Sutton
Service fields:
914 1 Andreas Smas
<pre>
915 66 Adam Sutton
name               str   required   Service name
916
type               str   required   Service type
917
caid               u32   optional   Encryption CA ID
918
caname             str   optional   Encryption CA name
919 11 Andreas Smas
</pre>
920 1 Andreas Smas
921 66 Adam Sutton
h3. channelUpdate
922 11 Andreas Smas
923 66 Adam Sutton
Same as channelAdd, but all fields (except channelId) are optional.
924
925 58 sbi -
h3. channelDelete
926 1 Andreas Smas
927
A channel has been deleted on the server.
928 58 sbi -
929
Message fields:
930 1 Andreas Smas
<pre>
931
channelId          u32   required   ID of channel.
932
</pre>
933
934
----
935
936 11 Andreas Smas
h3. tagAdd
937 1 Andreas Smas
938
A new tag has been created on the server.
939
940
Message fields:
941
<pre>
942 66 Adam Sutton
tagId              u32   required   ID of tag.
943
tagName            str   required   Name of tag.
944 117 Jaroslav Kysela
tagIndex           u32   optional   Index value for sorting (default by from min to max) (Added in version 18).
945 66 Adam Sutton
tagIcon            str   optional   URL to an icon representative for the channel.
946
tagTitledIcon      u32   optional   Icon includes a title
947 1 Andreas Smas
members            u32[] optional   Channel IDs of those that belong to the tag
948 11 Andreas Smas
</pre>
949 39 elupus -
950 58 sbi -
h3. tagUpdate
951 66 Adam Sutton
952 11 Andreas Smas
Same as tagAdd, but all fields (except tagId) are optional.
953
954 1 Andreas Smas
h3. tagDelete
955 58 sbi -
956 1 Andreas Smas
A tag has been deleted from the server.
957
958
Message fields:
959 66 Adam Sutton
<pre>
960 58 sbi -
tagId              u32   required   ID of tag.
961
</pre>
962 12 Andreas Smas
963 1 Andreas Smas
----
964 66 Adam Sutton
965 58 sbi -
h3. dvrEntryAdd (Added in version 4)
966 1 Andreas Smas
967 58 sbi -
A new recording has been created on the server.
968 1 Andreas Smas
969 2 Andreas Smas
Message fields:
970 66 Adam Sutton
<pre>
971
id                 u32   required   ID of dvrEntry.
972
channel            u32   required   Channel of dvrEntry.
973
start              s64   required   Time of when this entry was scheduled to start recording.
974 89 Jaroslav Kysela
stop               s64   required   Time of when this entry was scheduled to stop recording.
975
startExtra         s64   required   Extra start time (pre-time) in minutes (Added in version 13).
976 1 Andreas Smas
stopExtra          s64   required   Extra stop time (post-time) in minutes (Added in version 13).
977
retention          s64   required   DVR Entry retention time in days.
978 89 Jaroslav Kysela
priority           u32   required   Priority (0 = Important, 1 = High, 2 = Normal, 3 = Low, 4 = Unimportant, 5 = Not set) (Added in version 13).
979
eventId            u32   optional   Associated EPG Event ID (Added in version 13).
980 117 Jaroslav Kysela
autorecId          str   optional   Associated Autorec UUID (Added in version 13).
981
timerecId          str   optional   Associated Timerec UUID (Added in version 18).
982 89 Jaroslav Kysela
contentType        u32   optional   Content Type (like in the DVB standard) (Added in version 13).
983 66 Adam Sutton
title              str   optional   Title of recording
984 1 Andreas Smas
summary            str   optional   Short description of the recording (Added in version 6).
985
description        str   optional   Long description of the recording.
986 66 Adam Sutton
state              str   required   Recording state
987
error              str   optional   Plain english error description (e.g. "Aborted by user").
988 117 Jaroslav Kysela
owner              str   optional   Name of the entry owner (Added in version 18).
989
creator            str   optional   Name of the entry creator (Added in version 18).
990 1 Andreas Smas
</pre>
991 66 Adam Sutton
992 48 mdd -
TODO: recording states
993
994
h3. dvrEntryUpdate
995 66 Adam Sutton
996
Message fields:
997
<pre>
998
Same as dvrEntryAdd, but all fields (except id) are optional.
999 51 elupus -
</pre>
1000 66 Adam Sutton
1001 58 sbi -
h3. dvrEntryDelete (Added in version 4)
1002 66 Adam Sutton
1003 58 sbi -
A recording has been deleted from the server.
1004 48 mdd -
1005
Message fields:
1006 66 Adam Sutton
<pre>
1007 1 Andreas Smas
id                 u32   required   ID of recording to delete.
1008 48 mdd -
</pre>
1009 58 sbi -
1010 48 mdd -
----
1011 95 Jaroslav Kysela
1012
h3. autorecEntryAdd (Added in version 13)
1013
1014
A new autorec recording has been created on the server.
1015
1016 1 Andreas Smas
Message fields:
1017 95 Jaroslav Kysela
<pre>
1018
id                 str   required   ID (string!) of dvrAutorecEntry.
1019
enabled            u32   required   If autorec entry is enabled (activated).
1020 117 Jaroslav Kysela
name               str   required   Name of the autorec entry (Added in version 18).
1021 95 Jaroslav Kysela
minDuration        u32   required   Minimal duration in seconds (0 = Any).
1022
maxDuration        u32   required   Maximal duration in seconds (0 = Any).
1023
retention          u32   required   Retention time (in days).
1024
daysOfWeek         u32   required   Bitmask - Days of week (0x01 = Monday, 0x40 = Sunday, 0x7f = Whole Week, 0 = Not set).
1025
priority           u32   required   Priority (0 = Important, 1 = High, 2 = Normal, 3 = Low, 4 = Unimportant, 5 = Not set).
1026
approxTime         u32   required   Minutes from midnight (up to 24*60).
1027 1 Andreas Smas
startExtra         s64   required   Extra start minutes (pre-time).
1028
stopExtra          s64   required   Extra stop minutes (post-time).
1029 95 Jaroslav Kysela
title              str   optional   Title.
1030 122 Jaroslav Kysela
directory          str   optional   Forced directory name (Added in version 19).
1031 95 Jaroslav Kysela
channel            u32   optional   Channel ID.
1032 117 Jaroslav Kysela
owner              str   optional   Owner of this autorec entry (Added in version 18).
1033
creator            str   optional   Creator of this autorec entry (Added in version 18).
1034 95 Jaroslav Kysela
</pre>
1035 1 Andreas Smas
1036 95 Jaroslav Kysela
h3. autorecEntryUpdate (Added in version 13)
1037
1038
Message fields:
1039
<pre>
1040 117 Jaroslav Kysela
Same as autorecEntryAdd but all fields (except id) are optional.
1041 95 Jaroslav Kysela
</pre>
1042
1043 1 Andreas Smas
h3. autorecEntryDelete (Added in version 13)
1044
1045
Message fields:
1046
<pre>
1047
id                 str   required   Autorec Entry ID (string!)
1048 117 Jaroslav Kysela
</pre>
1049
1050
----
1051
1052 118 Jaroslav Kysela
h3. timerecEntryAdd (Added in version 18)
1053 117 Jaroslav Kysela
1054
A new autorec recording has been created on the server.
1055
1056
Message fields:
1057
<pre>
1058
title              str   required   Title for the recordings.
1059 123 Jaroslav Kysela
directory          str   optional   Forced directory name (Added in version 19).
1060 117 Jaroslav Kysela
enabled            u32   required   Title for the recordings.
1061
name               str   required   Name for this timerec entry.
1062
configName         str   required   DVR Configuration Name / UUID.
1063
channelId          u32   required   Channel ID.
1064
daysOfWeek         u32   optional   Bitmask - Days of week (0x01 = Monday, 0x40 = Sunday, 0x7f = Whole Week, 0 = Not set).
1065
priority           u32   optional   Priority (0 = Important, 1 = High, 2 = Normal, 3 = Low, 4 = Unimportant, 5 = Not set).
1066
start              u32   required   Minutes from midnight (up to 24*60) for the start of the time window (including)
1067
stop               u32   required   Minutes from modnight (up to 24*60) for the end of the time window (including, cross-noon allowed)
1068
retention          u32   optional   Retention in days. 
1069
comment            str   optional   User Comment.
1070
owner              str   optional   Owner of this timerec entry.
1071
creator            str   optional   Creator of this timerec entry.
1072
</pre>
1073
1074
h3. timerecEntryUpdate (Added in version 18)
1075
1076
Message fields:
1077
<pre>
1078
Same as timerecEntryAdd but all fields (except id) are optional.
1079
</pre>
1080
1081
h3. timerecEntryDelete (Added in version 18)
1082
1083
Message fields:
1084
<pre>
1085
id                 str   required   Timerec Entry ID (string!)
1086 95 Jaroslav Kysela
</pre>
1087
1088
----
1089
1090 66 Adam Sutton
h3. eventAdd (Added in version 6)
1091 48 mdd -
1092 66 Adam Sutton
Message fields:
1093
<pre>
1094
eventId            u32   required   Event ID
1095
channelId          u32   required   The channel this event is related to.
1096
start              u64   required   Start time of event, UNIX time.
1097
stop               u64   required   Ending time of event, UNIX time.
1098
title              str   optional   Title of event.
1099
summary            str   optional   Short description of the event (Added in version 6).
1100
description        str   optional   Long description of the event.
1101
serieslinkId       u32   optional   Series Link ID (Added in version 6).
1102
episodeId          u32   optional   Episode ID (Added in version 6).
1103
seasonId           u32   optional   Season ID (Added in version 6).
1104
brandId            u32   optional   Brand ID (Added in version 6).
1105
contentType        u32   optional   DVB content code (Added in version 4, Modified in version 6*).
1106
ageRating          u32   optional   Minimum age rating (Added in version 6).
1107
starRating         u32   optional   Star rating (1-5) (Added in version 6).
1108
firstAired         s64   optional   Original broadcast time, UNIX time (Added in version 6).
1109
seasonNumber       u32   optional   Season number (Added in version 6).
1110
seasonCount        u32   optional   Show season count (Added in version 6).
1111
episodeNumber      u32   optional   Episode number (Added in version 6).
1112
episodeCount       u32   optional   Season episode count (Added in version 6).
1113
partNumber         u32   optional   Multi-part episode part number (Added in version 6).
1114
partCount          u32   optional   Multi-part episode part count (Added in version 6).
1115
episodeOnscreen    str   optional   Textual representation of episode number (Added in version 6).
1116
image              str   optional   URL to a still capture from the episode (Added in version 6).
1117
dvrId              u32   optional   ID of a recording (Added in version 5).
1118
nextEventId        u32   optional   ID of next event on the same channel.
1119
</pre>
1120 48 mdd -
1121 66 Adam Sutton
* *contentType previously had the major DVB category in the bottom 4 bits, 
1122
  however in v6 this has been changed to properly match DVB, so top 4 bits
1123
  as major category and bottom 4 bits has sub-category. Clients requesting
1124
  v5 or lower will get the old output.
1125 48 mdd -
1126 66 Adam Sutton
h3. eventUpdate (Added in version 6)
1127 35 Andreas Smas
1128 58 sbi -
Message fields:
1129
<pre>
1130 66 Adam Sutton
Same as eventAdd but all fields (except eventId) are optional.
1131 35 Andreas Smas
</pre>
1132 58 sbi -
1133 77 John Törnblom
h3. eventDelete (Added in version 6)
1134 35 Andreas Smas
1135 66 Adam Sutton
Message fields:
1136
<pre>
1137
eventId            u32   required   Event ID
1138
</pre>
1139 14 Andreas Smas
1140 66 Adam Sutton
---
1141 14 Andreas Smas
1142 66 Adam Sutton
h3. initialSyncCompleted (Added in version 2)
1143 14 Andreas Smas
1144 66 Adam Sutton
Sent after all the initial metadata has been sent when session has been set to async mode.
1145 38 Andreas Smas
1146
Message fields:
1147 14 Andreas Smas
<pre>
1148
</pre>
1149
1150
----
1151
1152
h3. subscriptionStart
1153 53 Andreas Smas
1154 66 Adam Sutton
Asynchronous message output when a new subscription is successfully started.
1155 14 Andreas Smas
1156
Message fields:
1157 1 Andreas Smas
<pre>
1158 66 Adam Sutton
subscriptionId     u32   required   Subscription ID.
1159
streams            msg[] required   Array of messages with stream information
1160
sourceinfo         msg   optional   Source information.
1161
</pre>
1162 37 Andreas Smas
1163 66 Adam Sutton
Stream message fields:
1164
<pre>
1165
index              u32   required   Index for this stream
1166
type               str   required   Type of stream
1167 113 Jaroslav Kysela
meta               bin   optional   Codec metadata (private data, libav - extradata) (Added in version 17)
1168 66 Adam Sutton
language           str   optional   Language for stream
1169
Video components only:
1170
width              u32   optional   Width of video in pixels
1171
height             u32   optional   Height of video in pixels
1172 68 Andreas Smas
aspect_num         u32   optional   Aspect ratio numerator (Added in version 5) *Can be incorrect and should not be relied upon*
1173
aspect_den         u32   optional   Aspect ratio denonminator (Added in version 5) *Can be incorrect and should not be relied upon*
1174 66 Adam Sutton
Audio components only:
1175 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)
1176 66 Adam Sutton
channels           u32   optional   Number of audio channels (Added in version 5)
1177
rate               u32   optional   Audio bitrate (Added in version 5)
1178
Subtitle components only:
1179
composition_id     u32   optional   ??? (Added in version 5)
1180
ancillary_id       u32   optional   ??? (Added in version 5)
1181
</pre>
1182 2 Andreas Smas
1183 66 Adam Sutton
Sourceinfo message fields:
1184
<pre>
1185
adapter            str   optional   Adapter name
1186
mux                str   optional   Transponder name
1187
network            str   optional   Network name
1188
provider           str   optional   ???
1189
service            str   optional   Service name
1190
</pre>
1191 15 Andreas Smas
1192 66 Adam Sutton
Video Stream types:
1193 1 Andreas Smas
<pre>
1194 79 Jaroslav Kysela
MPEG2VIDEO                    MPEG2 video, meta field is present (configuration blocks)
1195
H264                          H264 video, meta field is present (configuration blocks)
1196
HEVC                          HEVC video, meta field is present (configuration blocks)
1197 66 Adam Sutton
</pre>
1198 15 Andreas Smas
1199 1 Andreas Smas
Audio Stream types:
1200
<pre>
1201 66 Adam Sutton
MPEG2AUDIO                    MPEG2 audio (MP2)
1202
AC3                           AC3 audio
1203 79 Jaroslav Kysela
AAC                           ADTS framed AAC (one AAC packet per ADTS frame), meta field is present (MPEG4 config)
1204 66 Adam Sutton
EAC3                          Enhanced AC3 audio
1205 79 Jaroslav Kysela
VORBIS                        Vorbis audio, meta field is present with the main vorbis header
1206 16 Andreas Smas
</pre>
1207
1208 66 Adam Sutton
Subtitle Stream types:
1209
<pre>
1210
TELETEXT                      ???
1211
DVBSUB                        ???
1212
</pre>
1213 55 Lars Op den Kamp -
1214 112 Jaroslav Kysela
h3. subscriptionGrace
1215
1216
Notifies client about the grace timeout (timeout for stream activation). It can be issues multiple times.
1217
For example a configuration with satellite rotors requires more than 120 seconds to tune, so users
1218
should be notified..
1219
1220
Message fields:
1221
<pre>
1222
subscriptionId     u32   required   Subscription ID.
1223
graceTimeout       u32   required   Grace timeout in seconds.
1224
</pre>
1225
1226 55 Lars Op den Kamp -
h3. subscriptionStop
1227
1228 66 Adam Sutton
A subscription has been stopped.
1229 55 Lars Op den Kamp -
1230
Message fields:
1231
<pre>
1232 66 Adam Sutton
subscriptionId     u32   required   Subscription ID.
1233 1 Andreas Smas
status             str   optional   Error message if subscription stopped unexpectedly.
1234
</pre>
1235
1236 73 Adam Sutton
h3. subscriptionSkip (Added version 9)
1237
1238
A subscription has been skipped.
1239
1240
Message fields:
1241
<pre>
1242
subscriptionId     u32   required   Subscription ID.
1243
error              u32   optional   The last skip command caused an error.
1244
absolute           u32   optional   Indicates the output is absolute (Note: should always be 1 at the moment)
1245
time               u64   optional   The time the subscription has skipped to.
1246
size               u64   optional   The position in the file we've skipped to (Note: not currently used).
1247
</pre>
1248
1249
h3. subscriptionSpeed (Added version 9)
1250
1251
A subscription's playback speed has changed.
1252
1253
This can happen even without a speed request, should playback reach either end of the buffer.
1254
1255
Message fields:
1256
<pre>
1257
subscriptionId     u32   required   Subscription ID.
1258
speed              u32   required   The new speed of the subscription
1259
</pre>
1260
1261 55 Lars Op den Kamp -
h3. subscriptionStatus
1262
1263 66 Adam Sutton
Subscription status update.
1264 58 sbi -
1265
Message fields:
1266
<pre>
1267 66 Adam Sutton
subscriptionId     u32   required   Subscription ID.
1268
status             str   optional   English clear text of error status. Absence of this field means that the status is OK. 
1269 16 Andreas Smas
</pre>
1270 58 sbi -
1271 16 Andreas Smas
h3. queueStatus
1272
1273 1 Andreas Smas
The queueStatus message is sent every second during normal data delivery.
1274 60 John Törnblom
1275
The transmit scheduler have different drop thresholds for different frame types.
1276 66 Adam Sutton
1277 1 Andreas Smas
If congestion occurs it will favor dropping B-frames before P-frames before I-frames.
1278
All audio is recognized as I-frames. 
1279 58 sbi -
1280 1 Andreas Smas
Message fields:
1281
<pre>
1282 66 Adam Sutton
subscriptionId     u32   required   Subscription ID.
1283
packets            u32   required   Number of data packets in queue.
1284
bytes              u32   required   Number of bytes in queue.
1285
delay              u32   optional   Estimated delay of queue (in µs).
1286 1 Andreas Smas
Bdrops             u32   required   Number of B-frames dropped
1287 66 Adam Sutton
Pdrops             u32   required   Number of P-frames dropped
1288
Idrops             u32   required   Number of I-frames dropped
1289 73 Adam Sutton
delay              s64   required   Delta between first and last DTS (Added in version 9)
1290 1 Andreas Smas
</pre>
1291
1292
h3. signalStatus
1293
1294
The signalStatus message is sent every second during normal data delivery.
1295
1296
The optional fields may not have been implemented or may not be supported by the active adapter.
1297
1298
Message fields:
1299
<pre>
1300 66 Adam Sutton
subscriptionId     u32   required   Subscription ID.
1301
feStatus           str   required   Frontend status.
1302
feSNR              u32   optional   Signal to noise ratio.
1303 1 Andreas Smas
feSignal           u32   optional   Signal status percentage.
1304
feBER              u32   optional   Bit error rate.
1305
feUNC              u32   optional   Uncorrected blocks.
1306 73 Adam Sutton
</pre>
1307
1308
h3. timeshiftStatus
1309
1310
Provide status every second about the timeshift buffer.
1311
1312
Message fields:
1313
<pre>
1314
subscriptionId     u32   required   Subscription ID.
1315
full               u32   required   Indicates whether the buffer is full
1316
shift              s64   required   Current position relative to live
1317
start              s64   optional   PTS of the first frame in the buffer
1318
end                s64   optional   PTS of the last frame in the buffer
1319 1 Andreas Smas
</pre>
1320
1321
h3. muxpkt
1322
1323
Streaming data.
1324
1325
Message fields:
1326
<pre>
1327 66 Adam Sutton
subscriptionId     u32   required   Subscription ID.
1328
frametype          u32   required   Type of frame as ASCII value: 'I', 'P', 'B'
1329
stream             u32   required   Stream index. Corresponds to the streams reported in the subscriptionStart message.
1330
dts                s64   optional   Decode Time Stamp in µs.
1331
pts                s64   optional   Presentation Time Stamp in µs.
1332
duration           u32   required   Duration of frame in µs.
1333
payload            bin   required   Actual frame data.
1334 1 Andreas Smas
</pre>