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@ -20587,11 +20587,16 @@ ebur128=metadata=1,adrawgraph=lavfi.r128.M:min=-120:max=5 |
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@anchor{ebur128} |
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@section ebur128 |
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EBU R128 scanner filter. This filter takes an audio stream as input and outputs |
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it unchanged. By default, it logs a message at a frequency of 10Hz with the |
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EBU R128 scanner filter. This filter takes an audio stream and analyzes its loudness |
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level. By default, it logs a message at a frequency of 10Hz with the |
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Momentary loudness (identified by @code{M}), Short-term loudness (@code{S}), |
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Integrated loudness (@code{I}) and Loudness Range (@code{LRA}). |
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The filter can only analyze streams which have a sampling rate of 48000 Hz and whose |
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sample format is double-precision floating point. The input stream will be converted to |
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this specification, if needed. Users may need to insert aformat and/or aresample filters |
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after this filter to obtain the original parameters. |
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The filter also has a video output (see the @var{video} option) with a real |
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time graph to observe the loudness evolution. The graphic contains the logged |
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message mentioned above, so it is not printed anymore when this option is set, |
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