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Re: normalize audio in mp4s



Quoting Emanuel Berg (2020-03-12 03:07:23)
> Reco wrote:
> 
> > FL = FL + 0.707 * FC + 0.707 * BL
> 
> With mediainfo(1) as recommended by Mr. Smedegaard, I got
> this
> 
> $ mediainfo ford-v-ferrari-2019.mkv | grep -i channel
> Channel(s)                               : 6 channels
> Channel layout                           : L R C LFE Ls Rs
> Channel(s)                               : 6 channels
> Channel layout                           : L R C LFE Ls Rs

You could also do this:

  mediainfo --Inform="Audio;%Channel(s)%: %ChannelLayout%" ford-v-ferrari-2019.mkv


> L = left, R = right, C = center?
> 
> LEF = low-frequency effects? [1]
> 
> Ls, Rs = left and right subwoofers?

Left/right _surround_.

5.1 means 5 discrete channels + subwoofer

...because low-frequency audio is difficult for humans to locate so a 
single mono channel is adequate for that.


 - Jonas

-- 
 * Jonas Smedegaard - idealist & Internet-arkitekt
 * Tlf.: +45 40843136  Website: http://dr.jones.dk/

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