<html><head><meta http-equiv="Content-Type" content="text/html charset=us-ascii"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "><div><blockquote type="cite">FramedSource* H264LiveServerMediaSubsession::createNewStreamSource(unsigned /*clientSessionId*/, unsigned& estBitrate) {<br> estBitrate = 10000; // kbps, estimate<br> // Create the video source:<br> H264LiveStreamFramedSource* liveFramer = H264LiveStreamFramedSource::createNew(envir(),liveBuffer);<br><span class="Apple-tab-span" style="white-space:pre"> </span>H264VideoStreamDiscreteFramer* discFramer = H264VideoStreamDiscreteFramer::createNew(envir(),liveFramer);<br> // Create a framer for the Video Elementary Stream:<br> return H264VideoStreamFramer::createNew(envir(), discFramer);<br></blockquote><div><br></div>No, this is wrong! You should not be creating/using a "H264VideoStreamFramer" at all. That class should be used *only* when the input is a byte stream (e.g., from a file). If - as in your case - the input is a discrete sequence of NAL units (i.e., one NAL unit at a time), then you should use a "H264VideoStreamDiscreteFramer" only. So, you should replace the line</div><div><span class="Apple-tab-span" style="white-space:pre"> </span>return H264VideoStreamFramer::createNew(envir(), discFramer);</div><div>with</div><div><span class="Apple-tab-span" style="white-space:pre"> </span>return discFramer;</div><div><br></div><div>That should also fix the problem that you're seeing with "fMaxSize" not being large enough in your "H264VideoStreamLiveFramedSource" implementation.</div><div><br></div><div><br><blockquote type="cite">This is the doGetNextFrame in the H264LiveStreamFramedSource I'm using:<br><br>void H264LiveStreamFramedSource::doGetNextFrame() {<br><br><span class="Apple-tab-span" style="white-space:pre"> </span>// Try to read as many bytes as will fit in the buffer provided (or "fPreferredFrameSize" if less)<br><span class="Apple-tab-span" style="white-space:pre"> </span>fFrameSize=fBuffer->read(fTo,fMaxSize,&fNumTruncatedBytes);<br></blockquote><div><br></div>This should work, provided that your "read()" function always delivers (to "*fTo") a single NAL unit, and nothing else - and blocks until one becomes available. In other words, after "read()" is called, the first bytes of *fTo must be the start of a single NAL unit, with *no* 'start code'.</div><div><br></div><div>This is not ideal, though, because, ideally, 'read' functions called from a LIVE555-based application should not block (because LIVE555-based applications run in a single-threaded event loop). Instead, if "doGetNextFrame()" gets called when no new NAL unit is currently available, it should return immediately.</div><div><br></div><div>I suggest that you review the sample code that we have provided in "liveMedia/DeviceSource.cpp". You can use this class as a model for how to write your "H264LiveStreamFramedSource" class.</div><br><br><div apple-content-edited="true">
<span class="Apple-style-span" style="border-collapse: separate; color: rgb(0, 0, 0); font-family: Helvetica; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-align: -webkit-auto; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-border-horizontal-spacing: 0px; -webkit-border-vertical-spacing: 0px; -webkit-text-decorations-in-effect: none; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; font-size: medium; "><span class="Apple-style-span" style="border-collapse: separate; color: rgb(0, 0, 0); font-family: Helvetica; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-align: -webkit-auto; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-border-horizontal-spacing: 0px; -webkit-border-vertical-spacing: 0px; -webkit-text-decorations-in-effect: none; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; font-size: medium; ">Ross Finlayson<br>Live Networks, Inc.<br><a href="http://www.live555.com/">http://www.live555.com/</a></span></span>
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