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313 lines
8.5 KiB
HTML
313 lines
8.5 KiB
HTML
<HTML>
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<HEAD>
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<title>LIBRTMP(3): </title></head>
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<table>
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<thead>
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<tr><td>LIBRTMP(3)<td align="center"><td align="right">LIBRTMP(3)
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</thead>
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<tfoot>
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<tr><td>RTMPDump v2.4<td align="center">2011-07-20<td align="right">LIBRTMP(3)
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</tfoot>
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<tbody><tr><td colspan="3"><br><br><ul>
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<!-- Copyright 2011 Howard Chu.
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Copying permitted according to the GNU General Public License V2.-->
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</ul>
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<h3>NAME</h3><ul>
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librtmp − RTMPDump Real-Time Messaging Protocol API
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</ul>
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<h3>LIBRARY</h3><ul>
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RTMPDump RTMP (librtmp, -lrtmp)
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</ul>
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<h3>SYNOPSIS</h3><ul>
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<b>#include <librtmp/rtmp.h></b>
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</ul>
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<h3>DESCRIPTION</h3><ul>
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The Real-Time Messaging Protocol (RTMP) is used for streaming
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multimedia content across a TCP/IP network. This API provides most client
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functions and a few server functions needed to support RTMP, RTMP tunneled
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in HTTP (RTMPT), encrypted RTMP (RTMPE), RTMP over SSL/TLS (RTMPS) and
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tunneled variants of these encrypted types (RTMPTE, RTMPTS). The basic
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RTMP specification has been published by Adobe but this API was
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reverse-engineered without use of the Adobe specification. As such, it may
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deviate from any published specifications but it usually duplicates the
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actual behavior of the original Adobe clients.
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<p>
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The RTMPDump software package includes a basic client utility program
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in
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<a href="../man1/rtmpdump.1"><b>rtmpdump</b></a>(1),
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some sample servers, and a library used to provide programmatic access
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to the RTMP protocol. This man page gives an overview of the RTMP
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library routines. These routines are found in the -lrtmp library. Many
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other routines are also available, but they are not documented yet.
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<p>
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The basic interaction is as follows. A session handle is created using
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<b>RTMP_Alloc</b>()
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and initialized using
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<b>RTMP_Init</b>().
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All session parameters are provided using
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<b>RTMP_SetupURL</b>().
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The network connection is established using
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<b>RTMP_Connect</b>(),
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and then the RTMP session is established using
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<b>RTMP_ConnectStream</b>().
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The stream is read using
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<b>RTMP_Read</b>().
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A client can publish a stream by calling
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<b>RTMP_EnableWrite</b>()
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before the
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<b>RTMP_Connect</b>()
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call, and then using
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<b>RTMP_Write</b>()
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after the session is established.
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While a stream is playing it may be paused and unpaused using
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<b>RTMP_Pause</b>().
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The stream playback position can be moved using
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<b>RTMP_Seek</b>().
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When
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<b>RTMP_Read</b>()
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returns 0 bytes, the stream is complete and may be closed using
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<b>RTMP_Close</b>().
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The session handle is freed using
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<b>RTMP_Free</b>().
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<p>
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All data is transferred using FLV format. The basic session requires
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an RTMP URL. The RTMP URL format is of the form
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<pre>
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rtmp[t][e|s]://hostname[:port][/app[/playpath]]
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</pre>
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<p>
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Plain rtmp, as well as tunneled and encrypted sessions are supported.
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<p>
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Additional options may be specified by appending space-separated
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key=value pairs to the URL. Special characters in values may need
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to be escaped to prevent misinterpretation by the option parser.
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The escape encoding uses a backslash followed by two hexadecimal digits
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representing the ASCII value of the character. E.g., spaces must
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be escaped as <b>\20</b> and backslashes must be escaped as <b>\5c</b>.
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</ul>
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<h3>OPTIONS</h3><ul>
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</ul>
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<h4>Network Parameters</h4><ul>
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These options define how to connect to the media server.
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<p>
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<dl compact><dt>
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<b>socks=</b><i>host:port</i>
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<dd>
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Use the specified SOCKS4 proxy.
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</dl>
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</ul>
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<h4>Connection Parameters</h4><ul>
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These options define the content of the RTMP Connect request packet.
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If correct values are not provided, the media server will reject the
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connection attempt.
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<p>
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<dl compact><dt>
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<b>app=</b><i>name</i>
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<dd>
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Name of application to connect to on the RTMP server. Overrides
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the app in the RTMP URL. Sometimes the librtmp URL parser cannot
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determine the app name automatically, so it must be given explicitly
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using this option.
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</dl>
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<p>
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<dl compact><dt>
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<b>tcUrl=</b><i>url</i>
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<dd>
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URL of the target stream. Defaults to rtmp[t][e|s]://host[:port]/app.
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</dl>
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<p>
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<dl compact><dt>
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<b>pageUrl=</b><i>url</i>
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<dd>
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URL of the web page in which the media was embedded. By default no
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value will be sent.
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</dl>
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<p>
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<dl compact><dt>
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<b>swfUrl=</b><i>url</i>
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<dd>
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URL of the SWF player for the media. By default no value will be sent.
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</dl>
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<p>
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<dl compact><dt>
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<b>flashVer=</b><i>version</i>
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<dd>
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Version of the Flash plugin used to run the SWF player. The
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default is "LNX 10,0,32,18".
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</dl>
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<p>
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<dl compact><dt>
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<b>conn=</b><i>type:data</i>
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<dd>
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Append arbitrary AMF data to the Connect message. The type
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must be B for Boolean, N for number, S for string, O for object, or Z
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for null. For Booleans the data must be either 0 or 1 for FALSE or TRUE,
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respectively. Likewise for Objects the data must be 0 or 1 to end or
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begin an object, respectively. Data items in subobjects may be named, by
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prefixing the type with 'N' and specifying the name before the value, e.g.
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NB:myFlag:1. This option may be used multiple times to construct arbitrary
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AMF sequences. E.g.
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<pre>
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conn=B:1 conn=S:authMe conn=O:1 conn=NN:code:1.23 conn=NS:flag:ok conn=O:0
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</pre>
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</dl>
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</ul>
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<h4>Session Parameters</h4><ul>
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These options take effect after the Connect request has succeeded.
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<p>
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<dl compact><dt>
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<b>playpath=</b><i>path</i>
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<dd>
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Overrides the playpath parsed from the RTMP URL. Sometimes the
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rtmpdump URL parser cannot determine the correct playpath
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automatically, so it must be given explicitly using this option.
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</dl>
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<p>
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<dl compact><dt>
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<b>playlist=</b><i>0|1</i>
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<dd>
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If the value is 1 or TRUE, issue a set_playlist command before sending the
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play command. The playlist will just contain the current playpath. If the
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value is 0 or FALSE, the set_playlist command will not be sent. The
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default is FALSE.
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</dl>
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<p>
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<dl compact><dt>
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<b>live=</b><i>0|1</i>
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<dd>
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Specify that the media is a live stream. No resuming or seeking in
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live streams is possible.
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</dl>
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<p>
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<dl compact><dt>
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<b>subscribe=</b><i>path</i>
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<dd>
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Name of live stream to subscribe to. Defaults to
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<i>playpath</i>.
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</dl>
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<p>
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<dl compact><dt>
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<b>start=</b><i>num</i>
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<dd>
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Start at
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<i>num</i>
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seconds into the stream. Not valid for live streams.
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</dl>
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<p>
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<dl compact><dt>
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<b>stop=</b><i>num</i>
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<dd>
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Stop at
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<i>num</i>
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seconds into the stream.
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</dl>
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<p>
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<dl compact><dt>
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<b>buffer=</b><i>num</i>
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<dd>
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Set buffer time to
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<i>num</i>
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milliseconds. The default is 30000.
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</dl>
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<p>
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<dl compact><dt>
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<b>timeout=</b><i>num</i>
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<dd>
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Timeout the session after
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<i>num</i>
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seconds without receiving any data from the server. The default is 120.
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</dl>
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</ul>
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<h4>Security Parameters</h4><ul>
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These options handle additional authentication requests from the server.
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<p>
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<dl compact><dt>
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<b>token=</b><i>key</i>
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<dd>
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Key for SecureToken response, used if the server requires SecureToken
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authentication.
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</dl>
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<p>
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<dl compact><dt>
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<b>jtv=</b><i>JSON</i>
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<dd>
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JSON token used by legacy Justin.tv servers. Invokes NetStream.Authenticate.UsherToken
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</dl>
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<p>
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<dl compact><dt>
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<b>swfVfy=</b><i>0|1</i>
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<dd>
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If the value is 1 or TRUE, the SWF player is retrieved from the
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specified
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<i>swfUrl</i>
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for performing SWF Verification. The SWF hash and size (used in the
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verification step) are computed automatically. Also the SWF information is
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cached in a
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<i>.swfinfo</i>
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file in the user's home directory, so that it doesn't need to be retrieved
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and recalculated every time. The .swfinfo file records
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the SWF URL, the time it was fetched, the modification timestamp of the SWF
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file, its size, and its hash. By default, the cached info will be used
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for 30 days before re-checking.
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</dl>
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<p>
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<dl compact><dt>
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<b>swfAge=</b><i>days</i>
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<dd>
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Specify how many days to use the cached SWF info before re-checking. Use
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0 to always check the SWF URL. Note that if the check shows that the
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SWF file has the same modification timestamp as before, it will not be
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retrieved again.
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</dl>
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</ul>
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<h3>EXAMPLES</h3><ul>
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An example character string suitable for use with
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<b>RTMP_SetupURL</b>():
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<pre>
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"rtmp://flashserver:1935/ondemand/thefile swfUrl=<a href="http://flashserver/player.swf">http://flashserver/player.swf</a> swfVfy=1"
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</pre>
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</ul>
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<h3>ENVIRONMENT</h3><ul>
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<p>
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<dl compact><dt>
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<b>HOME</b>
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<dd>
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The value of
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$<b>HOME</b>
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is used as the location for the
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<i>.swfinfo</i>
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file.
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</dl>
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</ul>
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<h3>FILES</h3><ul>
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<p>
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<dl compact><dt>
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<i>$HOME/.swfinfo</i>
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<dd>
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Cache of SWF Verification information
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</dl>
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</ul>
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<h3>SEE ALSO</h3><ul>
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<a href="../man1/rtmpdump.1"><b>rtmpdump</b></a>(1),
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<a href="../man8/rtmpgw.8"><b>rtmpgw</b></a>(8)
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</ul>
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<h3>AUTHORS</h3><ul>
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Andrej Stepanchuk, Howard Chu, The Flvstreamer Team
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<br>
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<<a href="http://rtmpdump.mplayerhq.hu">http://rtmpdump.mplayerhq.hu</a>>
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</ul></tbody></table></html>
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