<html><head><meta http-equiv="Content-Type" content="text/html charset=windows-1251"><base href="x-msg://2245/"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "><div><blockquote type="cite"><div lang="RU" 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: 12pt; font-family: 'Times New Roman', serif; "><span class="hps"><span lang="EN" style="font-size: 11pt; font-family: Calibri, sans-serif; ">“</span></span><span lang="EN-US" style="font-size: 11pt; font-family: Calibri, sans-serif; ">*any* of these packets gets lost,”<o:p></o:p></span></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif; "><span lang="EN-US" style="font-size: 11pt; font-family: Calibri, sans-serif; "> </span></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif; "><span lang="EN-US" style="font-size: 11pt; font-family: Calibri, sans-serif; ">Some questions:<o:p></o:p></span></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif; "><span lang="EN-US" style="font-size: 11pt; font-family: Calibri, sans-serif; ">Does it mean that RPT protocol is un</span><span class="hps"><span lang="EN" style="font-size: 11pt; font-family: Calibri, sans-serif; ">reliable?</span></span></div></div></div></blockquote><div><br></div>Yes. RTP packets sent over UDP (as they usually are) are unreliable.</div><div><br><blockquote type="cite"><div lang="RU" 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: 12pt; font-family: 'Times New Roman', serif; "><span class="hps"><span lang="EN" style="font-size: 11pt; font-family: Calibri, sans-serif; "><o:p></o:p></span></span></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif; "><span class="hps"><span lang="EN" style="font-size: 11pt; font-family: Calibri, sans-serif; ">So, if <span class="Apple-converted-space"> </span></span></span><span lang="EN-US" style="font-size: 11pt; font-family: Calibri, sans-serif; ">'slices' (NAL units) would be delivered<span class="Apple-converted-space"> </span></span><span lang="EN" style="font-size: 11pt; font-family: Calibri, sans-serif; ">through<span class="Apple-converted-space"> </span></span><span lang="EN-US" style="font-size: 11pt; font-family: Calibri, sans-serif; ">RPT, can they be lost too?<o:p></o:p></span></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif; "><span class="hps"><span lang="EN-US" style="font-size: 11pt; font-family: Calibri, sans-serif; ">Why the<span class="Apple-converted-space"> </span></span></span><span lang="EN-US" style="font-size: 11pt; font-family: Calibri, sans-serif; ">'slices'<span class="Apple-converted-space"> </span></span><span class="hps"><span lang="EN-US" style="font-size: 11pt; font-family: Calibri, sans-serif; ">way is more reliable?</span></span></div></div></div></blockquote><div><br></div>Because even if one slice of a picture is lost, the other slices of the picture will get delivered, and (depending on the decoder) should be able to get rendered and displayed.</div><div><br><blockquote type="cite"><div lang="RU" 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: 12pt; font-family: 'Times New Roman', serif; "><span class="hps"><span lang="EN-US" style="font-size: 11pt; font-family: Calibri, sans-serif; "><o:p></o:p></span></span></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif; "><span class="hps"><span lang="EN-US" style="font-size: 11pt; font-family: Calibri, sans-serif; ">Is a<span class="Apple-converted-space"> </span></span></span><span class="hps"><span lang="EN" style="font-size: 11pt; font-family: Calibri, sans-serif; ">unreliable</span></span><span class="shorttext"><span lang="EN" style="font-size: 11pt; font-family: Calibri, sans-serif; "> </span></span><span class="hps"><span lang="EN" style="font-size: 11pt; font-family: Calibri, sans-serif; ">transmission normal (reality)?</span></span></div></div></div></blockquote><div><br></div>It depends upon your network. Usually, lost packets happen infrequently.</div><div><br><blockquote type="cite"><div lang="RU" 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: 12pt; font-family: 'Times New Roman', serif; "><span class="hps"><span lang="EN" style="font-size: 11pt; font-family: Calibri, sans-serif; "><o:p></o:p></span></span></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif; "><span class="hps"><span lang="EN" style="font-size: 11pt; font-family: Calibri, sans-serif; ">In what object I must realize<span class="Apple-converted-space"> </span></span></span><span lang="EN-US" style="font-size: 11pt; font-family: Calibri, sans-serif; ">'slices'</span><span class="hps"><span lang="EN-US" style="font-size: 11pt; font-family: Calibri, sans-serif; "> </span></span><span class="hps"><span lang="EN" style="font-size: 11pt; font-family: Calibri, sans-serif; ">technology?</span></span><span class="hps"></span></div></div></div></blockquote></div><br><div>You would reconfigure your encoder to generate each 'key frame' as a sequence of 'slice' NAL units, instead of as a single NAL unit.</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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