<div dir="ltr">On 13 May 2013 09:45, Hermann Weber <span dir="ltr"><<a href="mailto:hermie.weber@gmx.de" target="_blank">hermie.weber@gmx.de</a>></span> wrote:<br><div class="gmail_extra"><div class="gmail_quote"><blockquote class="gmail_quote" style="margin:0pt 0pt 0pt 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
Hello!<br>
<br>
I need to extract audio data at a certain position in respect to the<br>
original audio data.<br>
<br>
Is the "-cbr" switch meant to ensure that data can be found on a<br>
specific position?<br>
<br>
I want to be able to predict where certain audio can be found in the<br>
encoded data.<br>
<br>
An example:<br>
If you put 10 apples into a box and then compress the box, you will not<br>
be able to predict where apple C can be found in the box.<br>
Perhaps apple B could be compressed more than apple C, and now the<br>
"position" of apple C is not predictable anymore.<br>
This is exactely NOT what I want :-)<br>
<br>
<br></blockquote><div><br></div><div>(Oops, replied off-list by mistake)<br></div><div><br>The encapsulation records this information, for Opus in Ogg you want 'granule position':<br><a href="http://tools.ietf.org/html/draft-ietf-codec-oggopus-00#section-4" target="_blank">http://tools.ietf.org/html/draft-ietf-codec-oggopus-00#section-4</a><br>
<a href="https://wiki.xiph.org/GranulePosAndSeeking" target="_blank">https://wiki.xiph.org/GranulePosAndSeeking</a><br><br><div>I'm less familiar with RTP, but I think the RTP timestamp is probably the equivalent thing:<br>
<a href="http://tools.ietf.org/html/draft-spittka-payload-rtp-opus-03" target="_blank">http://tools.ietf.org/html/draft-spittka-payload-rtp-opus-03</a><br>
</div><br><div class=""><div id=":20" class="" tabindex="0"><img class="" src="images/cleardot.gif"><br></div></div></div></div><br>-- <br>imalone<br><a href="http://ibmalone.blogspot.co.uk" target="_blank">http://ibmalone.blogspot.co.uk</a>
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