On 2016/04/17 1:43, Steve Corrao wrote:
1. run astats or volumedetect to calculate RMS level.
2. If RMS level = X dB, then add Y dB level to match the user specified dB
level.
Example: If RMS level = -30dB, and user specified RMS level = -20dB,
then add 10dB.
If LUFS can be used instead of RMS, this could be achieved by a two step
process. I could not find a tool off the shelf that measures RMS,
However, to my understanding, LUFS/LKFS is now the standard method of
normalizing audio for broadcast.
1. Measure LUFS using BS1770GAIN.
http://bs1770gain.sourceforge.net/
2. Transcode the source with FFmpeg with "--vol" option using values
parsed earlier.
--
David Shimamoto
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