totalCorruptionProbability
The cumulative sum of all corruption probability measurements that have been made for this SSRC.
Description
Real number; probability
MUST NOT exist for audio (this is video only).
Represents the cumulative sum of all corruption probability measurements that have been made for this SSRC, see corruptionMeasurements regarding when this attribute SHOULD be present.
Each measurement added to totalCorruptionProbability MUST be in the range [0.0, 1.0], where a value of 0.0 indicates the system has estimated there is no or negligible corruption present in the processed frame. Similarly a value of 1.0 indicates there is almost certainly a corruption visible in the processed frame. A value in between those two indicates there is likely some corruption visible, but it could for instance have a low magnitude or be present only in a small portion of the frame.
See also
- inbound-rtp->totalSquaredCorruptionProbability
- inbound-rtp->corruptionMeasurements
- WebRTC Statistics Specification
Notes
The corruption likelihood values are estimates - not guarantees. Even if the estimate is 0.0, there could be corruptions present (i.e. it's a false negative) for instance if only a very small area of the frame is affected. Similarly, even if the estimate is 1.0 there might not be a corruption present (i.e. it's a false positive) for instance if there are macroblocks with a QP far higher than the frame average. Just like there are edge cases for e.g. PSNR measurements, these metrics should primarily be used as a basis for statistical analysis rather than be used as an absolute truth on a per-frame basis.