<html><head></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; ">The following Matroska file (the file "test2.mkv" from the Matroska test suite), after being downloaded, plays perfectly on VLC (v1.1.11).<div><span class="Apple-tab-span" style="white-space:pre"> </span><a href="http://www.live555.com/test2.mkv">http://www.live555.com/test2.mkv</a><span class="Apple-tab-span" style="white-space:pre"> </span>(~20 MBytes)</div><div><br></div><div>However, if I extract the H.264 video track data (using the 'mkvtoolnix' "mkvextract" tool) into a file:</div><div><span class="Apple-tab-span" style="white-space:pre"> </span><a href="http://www.live555.com/">http://www.live555.com/</a><span class="Apple-tab-span" style="white-space:pre">test2-mkvextract.h264 </span>(~20 MBytes)</div><div>I find that the video is jittery when I play this file using VLC (again, v1.1.11).</div><div><br></div><div>Is this a known problem?</div><div><br></div><div>(The stream's H.264 SPS and PPS NAL units appear at the start of the "<span class="Apple-tab-span" style="white-space: pre; ">test2-mkvextract.h264</span>" file. Is it possible that some information in these NAL units is incorrect or missing, and that this turns out not to be a problem when the H.264 video stream is embedded within a Matroska file (e.g., because of all of the extra timecode information etc. that's present in the Matroska file)?)</div><br><br><div>
<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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