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Holger Hans Peter Freyther holger at freyther.deOn Thu, Jan 30, 2014 at 09:01:34PM +0100, Jacob Erlbeck wrote: Hi jacob! > This patch changes get_current_ts() to accept the desired rate as > argument and to use it for the time conversion instead of always > converting to microseconds. If microseconds are needed, > get_current_ts(1000) can be used. > The arrival_time is now measured in 1/rtp_end->rate seconds so that > it can be directly compared to RTP timestamps as required by RFC3550 > (section 6.4.1, see definition of 'interarrival jitter'). thanks for spotting this issue while working on related code. I am embarassed. It appears that the transmit time was already drifting apart.