On 18 Nov 2008, at 22:43, Jonathan Lennox wrote:
Magnus Westerlund writes:
...
So I do want to question if we really should do this restriction which only provides a benefit in the single media case. As soon you have more than one media or streams that needs synchronization you anyway need touse RTCP.No one is suggesting not using RTCP for all the things it's currentlyused for -- lip sync, statistics reporting, etc. We're just saying thatit has enough limitations, at least as implemented in almost all existing implementations, that it shouldn't be extended to this new domain.
The point, for which I agree with Magnus, is that you need to implement the RTCP SR-based mechanism anyway for lip-sync. If you implement it correctly, it also solves the synchronisation problem for layered codecs. Rather than spending all this energy inventing yet another different and incompatible synchronisation mechanism, spend the energy documenting how to implement the existing standard solution.
-- Colin Perkins http://csperkins.org/ _______________________________________________ Audio/Video Transport Working Group avt at ietf.org https://www.ietf.org/mailman/listinfo/avt