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--></style><title>Re: [Live-devel] creating a simple RTP
server</title></head><body>
<blockquote type="cite" cite>
<blockquote>>Are you *sure* that you don't know anything about the
format of your media?<br>
</blockquote>
</blockquote>
<blockquote type="cite" cite> </blockquote>
<blockquote type="cite" cite> </blockquote>
<blockquote type="cite" cite>ok then, suppose I know what media type
it is, for instance h263+ or mpeg2 or whatever is easiest to converse
about.</blockquote>
<blockquote type="cite" cite>further suppose that they media is not
coming from file, but rather it is handed out to me, already divided
into frames.</blockquote>
<blockquote type="cite" cite> </blockquote>
<blockquote type="cite" cite>I wish to properly package them in RTP
and send them to a known RTP client, who is already listening and
waiting for the packets.</blockquote>
<blockquote type="cite" cite> </blockquote>
<blockquote type="cite" cite>The live555 library already has a
XXXframer class for the codec, but do I really need it, after all, its
already framed ...</blockquote>
<div><br></div>
<div>No, you shouldn't need a "*Framer" class, provided that
you provide accurate presentation times for each frame. (Note,
though, that if you have MPEG-2 video with B-frames, then the
presentation times will *not* be monotonically increasing. If
you don't understand what I mean by this, then you should use a
"MPEG1or2VideoStreamDiscreteFramer" with MPEG-2
video.)</div>
<div><br></div>
<blockquote type="cite" cite>how do I go about implementing the a
ServerMediaSubsession class?</blockquote>
<div><br></div>
<div>Just use the existing "*FileServerMediaSubsession"
class as a model.</div>
<div><br></div>
<div>Of course, you will also need to write your own
"FramedSource" subclass that encapsultes your data source -
delivering one frame at a time. See the "DeviceSource.cpp"
code for a model.</div>
<div><br></div>
<blockquote type="cite" cite>or should I use<font size="-1"
color="#010001"> PassiveServerMediaSubsession
instead?</font></blockquote>
<div><br></div>
<div>"PassiveServerMediaSubsession" is used only for
multicast streams.</div>
<x-sigsep><pre>--
</pre></x-sigsep>
<div><br>
Ross Finlayson<br>
Live Networks, Inc.<br>
http://www.live555.com/</div>
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