[Live-devel] How to transform the presentationTime to Normal Play Time(NPT) ?

[weiyutao36]

Hi Ross,
In your last letter, you gave me some advice and I followed that.In 
liveMedia/FileSink.cpp, in the function "FileSink::addData()" I could 
get the presentationTime of the latest frame/packet. But when I 
printed out the "presentationTime", I found that it had the following 
form:
                 latest_NPT.tv_sec = 1156840357                 
,presentationTime.tv_sec=1156840357
I don't what does this mean---the number is so big!
And furthermore, when I want to use the 
"playMediaSession(MediaSession &session, start, end,scale) " 
function,
 I know there's something more to be done. The playMediaSession() 
function requires a "start" parameter of "float type"(am I right?) and 
the parameter should be in the range of the media file such as 
"0-7.845000",which is the range of the media file mpg1video.mpg. 
So, my question is: how to transform the presentationTime to NPT of 
the media? Or what is the relationship between thepresentationTime 
and the NPT?
Maybe I missed something.
Any opinion is appreciated.
Thank you.
 
 
 
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://lists.live555.com/pipermail/live-devel/attachments/20060829/56244729/attachment.html