[Live-devel] [Question] Streaming transmission rate of liveMedia Server

[Cristiano Belloni]

Ross Finlayson wrote:
>>  >> I'm analyzing Live555MediaServer to find out how
>>     
>>>>  the server decides its transmission rate!
>>>>    
>>>>         
>>>  It's determined by the "fDurationInMicroseconds" parameter set for
>>>  the source object that feeds into each "RTPSink" (subclass).  I.e.,
>>>  its the data sources that determine the transmission rate.
>>>
>>>  The "fDurationInMicroseconds" parameter is usually determined within
>>>  the "*Framer" object that lies between the data source object and the
>>>  "*RTPSink" object.  (Note the numerous examples of this in the source
>>>  code.)
>>>  
>>>       
>> I've always wondered what value "fDurationInMicroseconds" should take in
>> video frames.
>> A simple answer is probably 1 sec / framerate. Is it toio simple or am I
>> correct?
>>     
>
> You mean 1000000/framerate, of course.
>
>   
Yeah :)
>> Anyway, I set it to 0 in my framer, for now, and it seems it works
>> perfectly.
>>     
>
> That must be because you are streaming from a live source.  If you 
> are streaming from a live source, then it's perfectly OK (in fact, 
> preferred) to not set "fDurationInMicroseconds" (which means that it 
> retains its default value of 0), because in that case each frame will 
> be delivered to the downstream "RTPSink" object when it becomes 
> available, even though the "RTPSink" object asked for it immediately 
> after the previous frame was transmitted.
>   
Great.

Thanks,
Cristiano.

-- 
Belloni Cristiano
Imavis Srl.
www.imavis.com <http://www.imavis.com>
belloni at imavis.com <mailto://belloni@imavis.com>