qpSum
outbound-rtpoutboundvideo
The sum of the QP values of frames encoded by this sender.
Description
Non-negative integer
MUST NOT exist for audio (this is video only).
The sum of the QP values of frames encoded by this sender. The count of frames is in framesEncoded.
The definition of QP value depends on the codec; for VP8, the QP value is the value carried in the frame header as the syntax element y_ac_qi, and defined in RFC6386 section 19.2. Its range is 0..127.
Note that the QP value is only an indication of quantizer values used; many formats have ways to vary the quantizer value within the frame.
This value is an accumulator.
See also
- outbound-rtp->qpSum/framesEncoded
- outbound-rtp->framesEncoded
- WebRTC Statistics Specification
Notes
- Unless you are tuning an encoder and doing A/B tests about that it is not of much use to you