[MPlayer-users] looking for the correct syntax of a certain command
abelschreck3 at freenet.de
Sat Apr 10 15:43:48 EEST 2021
I found out that mplayer supports an *equalizer* option natively.
The command "mplayer -af equalizer=0:0:0:0:0:0:0:0:10:10
sound-file.wav" generally works fine. It produces much crisper audio.
But: *Some* wav-files have a sample-rate that is too low for that
process. Terminal says:
"[equalizer] Limiting the number of filters to 8 due to low sample rate."
So the equalizer option has no effect.
On http://mplayerhq.hu/DOCS/HTML/en/MPlayer.html I found an interesting
"Sample Rate Conversion:
If the audio sample rate in the original file is not the same as
required by the target format, sample rate conversion is required. This
is achieved using the -srate option and the -af lavcresample audio
This is the example they give:
"DVD: -srate 48000 -af lavcresample=48000"
Now I´m not dealing with a DVD here but a mere audio-file. So I tried
two different commands:
"mplayer -srate 44100 -af equalizer=0:0:0:0:0:0:0:0:10:10
"mplayer -srate 44100 -af lavcresample=44100 -af
Both work equally well and produce an exit code of "0". And both have
the desired effect of making the equalizer kick in.
So my question is:
What do you think, which syntax is the correct one and which should I use?
Thanks in advance for your help.
my system: Linux/Lubuntu 20.04.2 LTS
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