Additional description of audioLevel #288
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@@ -1996,6 +1996,23 @@ <h2> | |
| level = -round(log10(audioLevel) * 20), with audioLevel 0.0 and values above 127 | ||
| mapped to 127. | ||
| </p> | ||
| <p> | ||
| The <a>audioLevel</a> represents the output audio | ||
| level of the track; thus, if the track is sourced | ||
| from an <a>RTCReceiver</a>, does no audio | ||
| processing, has a constant level, and has | ||
| a <a>volume</a> setting of 1.0, the audio level is | ||
| expected to be the same as the audio level of the | ||
| source SSRC, while if the <a>volume</a> setting is | ||
| 0.5, the audioLevel is expected to be half that | ||
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There was a problem hiding this comment. Doesn't this go against @vr000m's recommendation? There was a problem hiding this comment. Not sure which recommendation you're referring to. There was a problem hiding this comment. My expectation was that input audio level and output level would match. And if someone did not hear anything then the volume stat being 0 would identify the problem. I am trying to see now if we compare the input audio level with the audio output level and the audio output takes the volume into account, how do I diagnose if the issue is with the post decoding filter...? There was a problem hiding this comment. You ask for a solution to #271 |
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| value. | ||
| </p> | ||
| <p> | ||
| The audioLevel is averaged over some small | ||
| interval, using the algortihm described | ||
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There was a problem hiding this comment. This "small interval" part is new; what was the assumption before? That it was just the last decoded/sent packet? There was a problem hiding this comment. The previous assumption was that it wasn't mentioned; I think the code averaged over a packet. This leaves it specified as "implementation defined", but the averaging has to use the sum-of-squares method rather than just averaging (averaging gives a completely bogus number). |
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| under <a>totalAudioEnergy</a>. The interval used is | ||
| implementation dependent. | ||
| </p> | ||
| </dd> | ||
| <dt> | ||
| <dfn><code>totalAudioEnergy</code></dfn> of type <span class= | ||
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nit: RTCRtpReceiver
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did this metric not report on the input and an output audio level?
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Or at least there should be a section on input audio level as well.
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#271