[Live-devel] MultiFramedRTPSink::specialHeaderSize()

[Ross Finlayson]

At 04:43 PM 4/7/2006, you wrote:
>I'm sure I didn't do this the best way, but I created a new class
>H264VideoStreamFUAFramer (derived from FramedFilter) that takes NAL Units as
>input and outputs fragmented (FU-A) NAL Unit types.

FYI, I've come to the conclusion that - right now, at least - this is 
probably the most reasonable way to implement a "H264VideoRTPSink", 
because of the problem of variable-sized 'special headers' in the RTP 
payload format for H.264.

I.e., sitting in front of the "MultiFramedRTPSink" subclass, there 
would be a separate "FramedFilter" subclass that takes complete NAL 
units as input, and outputs appropriately fragmented NAL units 
(including all required header bytes).

Unfortunately this is a bit of a hack, because it requires knowledge 
of the preferred output packet size, and because it would end up 
doing an extra memory copy of each NAL unit.  But it seems like the 
simplest solution, for now at least.


	Ross Finlayson
	Live Networks, Inc. (LIVE555.COM)
	<http://www.live555.com/>