<html xmlns:v="urn:schemas-microsoft-com:vml" xmlns:o="urn:schemas-microsoft-com:office:office" xmlns:w="urn:schemas-microsoft-com:office:word" xmlns:m="http://schemas.microsoft.com/office/2004/12/omml" xmlns="http://www.w3.org/TR/REC-html40"><head><meta http-equiv=Content-Type content="text/html; charset=gb2312"><meta name=Generator content="Microsoft Word 14 (filtered medium)"><base href="x-msg://3133/"><style><!--
/* Font Definitions */
@font-face
{font-family:Helvetica;
panose-1:2 11 6 4 2 2 2 2 2 4;}
@font-face
{font-family:宋体;
panose-1:2 1 6 0 3 1 1 1 1 1;}
@font-face
{font-family:宋体;
panose-1:2 1 6 0 3 1 1 1 1 1;}
@font-face
{font-family:Calibri;
panose-1:2 15 5 2 2 2 4 3 2 4;}
@font-face
{font-family:"\@宋体";
panose-1:2 1 6 0 3 1 1 1 1 1;}
/* Style Definitions */
p.MsoNormal, li.MsoNormal, div.MsoNormal
{margin:0cm;
margin-bottom:.0001pt;
font-size:12.0pt;
font-family:宋体;}
a:link, span.MsoHyperlink
{mso-style-priority:99;
color:blue;
text-decoration:underline;}
a:visited, span.MsoHyperlinkFollowed
{mso-style-priority:99;
color:purple;
text-decoration:underline;}
span.apple-style-span
{mso-style-name:apple-style-span;}
span.EmailStyle18
{mso-style-type:personal-reply;
font-family:"Calibri","sans-serif";
color:#1F497D;}
.MsoChpDefault
{mso-style-type:export-only;
font-size:10.0pt;}
@page WordSection1
{size:612.0pt 792.0pt;
margin:72.0pt 90.0pt 72.0pt 90.0pt;}
div.WordSection1
{page:WordSection1;}
--></style><!--[if gte mso 9]><xml>
<o:shapedefaults v:ext="edit" spidmax="1026" />
</xml><![endif]--><!--[if gte mso 9]><xml>
<o:shapelayout v:ext="edit">
<o:idmap v:ext="edit" data="1" />
</o:shapelayout></xml><![endif]--></head><body lang=ZH-CN link=blue vlink=purple><div class=WordSection1><p class=MsoNormal><span lang=EN-US style='font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1F497D'>I get the time by gettimeofday, and they are equal in the video and audio’s stream.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><div><div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0cm 0cm 0cm'><p class=MsoNormal><b><span style='font-size:10.0pt'>发件人<span lang=EN-US>:</span></span></b><span lang=EN-US style='font-size:10.0pt'> live-devel-bounces@ns.live555.com [mailto:live-devel-bounces@ns.live555.com] </span><b><span style='font-size:10.0pt'>代表 </span></b><span lang=EN-US style='font-size:10.0pt'>Ross Finlayson<br></span><b><span style='font-size:10.0pt'>发送时间<span lang=EN-US>:</span></span></b><span lang=EN-US style='font-size:10.0pt'> 2012</span><span style='font-size:10.0pt'>年<span lang=EN-US>9</span>月<span lang=EN-US>17</span>日<span lang=EN-US> 16:08<br></span><b>收件人<span lang=EN-US>:</span></b><span lang=EN-US> LIVE555 Streaming Media - development & use<br></span><b>主题<span lang=EN-US>:</span></b><span lang=EN-US> Re: [Live-devel] Regarding the audio and video sync<o:p></o:p></span></span></p></div></div><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><div><blockquote style='margin-top:5.0pt;margin-bottom:5.0pt'><div><p class=MsoNormal style='text-align:justify;text-justify:inter-ideograph'><span lang=EN-US style='font-size:10.5pt;font-family:"Calibri","sans-serif"'>But unfortunately, I use vlc to access it, it can’t work correctly. If video is appear, then audio disappears. Otherwise, audio appears, video disappears.<o:p></o:p></span></p></div></blockquote><div><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p></div><p class=MsoNormal><span lang=EN-US>This is probably because the presentation time ("fPresentationTime") values for the audio and video streams are not properly synchronized. Remember, the audio and video presentation times need to come from the same time base, which needs to be aligned with 'wall clock' time (the time that you would get by calling "gettimeofday()"). You haven't said what your "GetTimeScale()" function (the function that sets the first presentation time for each substream) does, but it needs to be equivalent to calling "gettimeofday()".<o:p></o:p></span></p></div><div><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p></div><div><p class=MsoNormal><span lang=EN-US>In any case, I've spent enough time on this - so this will be my last posting on this topic.<o:p></o:p></span></p></div><p class=MsoNormal style='margin-bottom:12.0pt'><span lang=EN-US><o:p> </o:p></span></p><div><p class=MsoNormal><span class=apple-style-span><span lang=EN-US style='font-size:13.5pt;font-family:"Helvetica","sans-serif";color:black'>Ross Finlayson</span></span><span lang=EN-US style='font-size:13.5pt;font-family:"Helvetica","sans-serif";color:black'><br><span class=apple-style-span>Live Networks, Inc.</span><br><span class=apple-style-span><a href="http://www.live555.com/">http://www.live555.com/</a></span></span><span lang=EN-US> <o:p></o:p></span></p></div><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p></div></body></html>