[Live-devel] What is a frame in the live-lib ?

[Ross Finlayson]

>What exactly is a Frame?

In the context of the "LIVE.COM Streaming Media" code, a "frame" is a 
discrete unit of data that gets delivered, by a "FramedSource" object, to a 
downstream receiver.  That's a deliberately vague explanation.

For RTP streaming, for example, a "frame" is a discrete unit of data - with 
special semantics - that can be packed (perhaps several at a time) into a 
RTP packet.

>  We want to implement a DVB source based on
>FramedSource. Our DVB-Parser currently exports PES-Frames

So, is there one PES source for audio, and another PES source for 
video?  Or is your input data really a single MPEG Program Stream (in which 
case you will want to pass your data through a "MPEG1or2Demux" 
first)?  Also, what do you want to do with this data?  Stream it using RTP 
(as separate audio and video streams), or convert it to a Transport Stream, 
or what?

Rather that focusing right now on the question of what a 'frame' is, you 
should first ask yourself what is the format of your input data, and what 
do you want to do with it?


	Ross Finlayson
	LIVE.COM
	<http://www.live.com/>