How a clock offset can produce a negative delay reading
A negative receiver-minus-sender timestamp can expose misaligned clocks. It does not mean the packet physically arrived before it left.
The journal
The viewing journal — page 51
Practical reading about streaming, devices and the decisions behind a better prepared setup.
Why an RTCP jitter value needs its media clock rate
The base RTCP interarrival jitter field uses RTP timestamp units. Convert it using the clock rate associated with that source.
Why recent RTCP loss and the lifetime count can disagree
A recent interval and a cumulative counter cover different spans. Compare their periods before treating the displayed values as contradictory.
Why an RTCP cumulative loss count can be negative
The base RTCP cumulative loss field compares expected packets with received packets. Its counting rules allow a negative result when duplicates or late arrivals affect the totals.
Why the same packet loss percentage can describe different problems
Ten missing packets out of one thousand gives one percent loss whether the missing packets are scattered or consecutive. The pattern adds information the percentage omits.
How a twenty millisecond average can hide a one second spike
An average summarises a distribution. Keep the sample size and tail observations when occasional stalls are the question.