<html xmlns:o="urn:schemas-microsoft-com:office:office" xmlns:w="urn:schemas-microsoft-com:office:word" xmlns="http://www.w3.org/TR/REC-html40">
<head>
<META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=us-ascii">
<meta name=Generator content="Microsoft Word 11 (filtered medium)">
<style>
<!--
/* Style Definitions */
p.MsoNormal, li.MsoNormal, div.MsoNormal
{margin-top:6.0pt;
margin-right:0cm;
margin-bottom:0cm;
margin-left:18.0pt;
margin-bottom:.0001pt;
text-align:justify;
font-size:11.0pt;
font-family:Arial;}
a:link, span.MsoHyperlink
{color:blue;
text-decoration:underline;}
a:visited, span.MsoHyperlinkFollowed
{color:purple;
text-decoration:underline;}
p
{margin-top:6.0pt;
margin-right:0cm;
margin-bottom:0cm;
margin-left:18.0pt;
margin-bottom:.0001pt;
text-align:justify;
font-size:12.0pt;
font-family:"Times New Roman";}
p.Image, li.Image, div.Image
{margin-top:3.0pt;
margin-right:0cm;
margin-bottom:3.0pt;
margin-left:1.0cm;
text-align:center;
font-size:11.0pt;
font-family:Arial;}
span.EmailStyle19
{mso-style-type:personal-compose;
font-family:Arial;
color:windowtext;}
@page Section1
{size:595.3pt 841.9pt;
margin:70.85pt 70.85pt 70.85pt 70.85pt;}
div.Section1
{page:Section1;}
-->
</style>
</head>
<body lang=FR link=blue vlink=purple>
<div class=Section1>
<p class=MsoNormal><font size=2 face=Arial><span lang=EN-GB style='font-size:
10.0pt'>Hi all,<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=EN-GB style='font-size:
10.0pt'>I’m trying to find out the frame rate of an H264 video stream
generated by a Linphone soft phone : I know that the actual framerate is 15fps
but the decoded timing information decoded from the sequence parameters set NAL
are num_units_in_ticks=384 and time_scale=16777217… These 2 values are
the same when I decode the sps nal with my own decoder or when I use the
WireSharck analyser, so I think they are good.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=EN-GB style='font-size:
10.0pt'>The issue is that I don’t understand how I could compute 15 fps
from these values!<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=EN-GB style='font-size:
10.0pt'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt'>Regards,<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;color:navy'>Philippe Triolet<o:p></o:p></span></font></p>
<p class=MsoNormal align=center style='text-align:center'><strong><b><font
size=2 color=navy face=Arial><span style='font-size:10.0pt;font-family:Arial;
color:navy'>AASTRA France</span></font></b></strong><strong><b><font size=3
face="Times New Roman"><span style='font-size:12.0pt'><o:p></o:p></span></font></b></strong></p>
<p class=MsoNormal align=center style='text-align:center'><font size=2
color=navy face=Arial><span style='font-size:10.0pt;color:navy'>1 rue Arnold
Schoenberg</span></font><o:p></o:p></p>
<p class=MsoNormal align=center style='text-align:center'><font size=2
color=navy face=Arial><span style='font-size:10.0pt;color:navy'>78280
Guyancourt<o:p></o:p></span></font></p>
<p class=MsoNormal align=center style='text-align:center'><font size=2
color=navy face=Arial><span style='font-size:10.0pt;color:navy'>01-30-96-44-33<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><o:p> </o:p></font></p>
</div>
</body>
</html>