<html><head><meta http-equiv="Content-Type" content="text/html charset=KS_C_5601-1987"><base href="x-msg://2765/"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "><div><blockquote type="cite"><div lang="KO" link="blue" vlink="purple" style="font-family: Helvetica; font-size: medium; 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-text-size-adjust: auto; -webkit-text-stroke-width: 0px; "><div class="WordSection1" style="page: WordSection1; "><div style="margin: 0cm 0cm 0.0001pt; font-size: 10pt; font-family: 'Courier New'; "><span lang="EN-US">I had already conducted a test with VLC Media Player before testing with STB. (VLC v.2.0.6 and VLC v2.0.7)<o:p></o:p></span></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 10pt; font-family: 'Courier New'; "><span lang="EN-US"> </span></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 10pt; font-family: 'Courier New'; "><span lang="EN-US">As you can see original file, 2x file is not animated as original file and 4x file is somehow animated but looks quite unnatural.<o:p></o:p></span></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 10pt; font-family: 'Courier New'; "><span lang="EN-US">Could you please check it out again?</span></div></div></div></blockquote><div><br></div><div>Yes, I see the problem that you're referring to, but unfortunately I can't figure out specifically what's wrong with the videos. So I hope someone on this mailing list (with expertise in H.264/Transport Stream video) can help diagnose the problem.</div><div><br></div><div>I have put the example files online at</div><div><span class="Apple-tab-span" style="white-space:pre"> </span><a href="http://www.live555.com/ChunMyung/">http://www.live555.com/ChunMyung/</a></div><div><br></div><div>Note the file "ChunMyung1.ts". This file was created by applying 'trick play' to the original file, with a scale factor of 1 - i.e., by running:</div><div><span class="Apple-tab-span" style="white-space:pre"> </span>testMPEG2TransportStreamTrickPlay ChunMyung.ts 0 1 ChunMyung1.ts</div><div>Because our 'trick play' works by using I-frames only, this file effectively consists just of the i-frames from the original file. If you play this file in VLC, you can see that the I-frames freeze starting at about the 10 second mark, and do not resume until about the 1 minute mark. Does anyone know why?</div><div><br></div><div>For another illustration of this, note the file "ChunMyung1-30.ts". This file was created by applying 'trick play' to the original file, with a scale factor of 1, but starting at the 30 second mark - i.e., by running:</div><div><span class="Apple-tab-span" style="white-space:pre"> </span>testMPEG2TransportStreamTrickPlay ChunMyung.ts 30 1 ChunMyung1-30.ts</div><div>If you play this file in VLC, you can see that the video is 'empty' until about the 30 second mark (i.e., corresponding to about 1 minute into the original video). Does anyone know why?</div></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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