- From: henbos via GitHub <sysbot+gh@w3.org>
- Date: Tue, 31 Jan 2017 16:05:06 +0000
- To: public-webrtc@w3.org
henbos has just created a new issue for https://github.com/w3c/webrtc-stats: == RTCMediaStreamTrackStats.audioLevel... input vs output? == The spec currently says: > Only valid for audio. The value is between 0..1 (linear), where 1.0 represents 0 dBov, 0 represents silence, and 0.5 represents approximately 6 dBSPL change in the sound pressure level from 0 dBov. > > The "audio level" value defined in [RFC6464] and used in the RTCRtpContributingSource.audioLevel of [WEBRTC] (defined as 0..127, where 0 represents 0 dBov, 126 represents -126 dBov and 127 represents silence) is obtained by the calculation given in appendix A of [RFC6465]: informally, level = -round(log10(audioLevel) * 20), with audioLevel 0.0 and values below 127 mapped to 127. The non-standardized Chromium getStats has both `ssrc.audioInputLevel` and `ssrc.audioOutputLevel`. The source audio level would be the "input" audio level. Question is, should there also be a standardized stat for "output" level? Please view or discuss this issue at https://github.com/w3c/webrtc-stats/issues/145 using your GitHub account
Received on Tuesday, 31 January 2017 16:06:40 UTC