Knowledge Base

qpSum

inbound-rtpinboundvideo

The sum of the QP values of frames decoded by this receiver.

Description

Non-negative integer

MUST NOT exist for audio (this is video only).

The sum of the QP values of frames decoded by this receiver. The count of frames is in framesDecoded.

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

Notes

  • Unless you are tuning an encoder and doing A/B tests about that it is not of much use to you