[FFmpeg-user] ffmpeg development
shima at pspunch.com
Mon Apr 18 06:12:36 CEST 2016
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.
2. Transcode the source with FFmpeg with "--vol" option using values
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