<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">I'm trying to stream live H.264 video and live G.711 audio, using<br>testMPEG1or2AudioVideoStreamer.cpp as an example.</blockquote><div><br></div>I'm not sure how much of an 'example' the "testMPEG1or2AudioVideoStreamer" code can be, given that it streams from a file source, and uses completely different codecs (and thus uses completely different "RTPSink" subclasses). But anyway...</div><div><br></div><div><br><blockquote type="cite"> Both video<br>and audio come from hardware encoders. As soon as encoded buffer<br>is available, live555 code is notified via event trigger associated<br>with media source. I'm using VLC to play the stream.<br><br>The problem is that video freezes almost immediately.<br>If only video is streamed, there's no problem.<br><br>I suspect that audio can starve video since audio frame size produced<br>by encoder is 160 bytes and some find of aggregation is required.<br>Does this sound right ?<br></blockquote><div><br></div>That's a possibility. However a more likely cause of problems like this is that you are setting "fPresentationTime" incorrectly for one or both of your audio and video substreams - so they end up being non-synchronized at the receiver (VLC) end.</div><div><br></div><div>For each frame delivered by your input source, "fPresentationTime" must be set properly, and must be aligned with 'wall clock' time - i.e., the time that you'd get by calling "gettimeofday()".</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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