[MPlayer-users] correct syntax for combining filters
wanderer at fastmail.fm
Thu Apr 15 19:48:23 EEST 2021
On 2021-04-15 at 10:08, Christian wrote:
> Hi all,
> I´m looking for the right way to combine filters in *mplayer*.
> I want to achieve the following:
> I´d like to play a .wav-file with the *equalizer*-option set and the
> *higher-speed*-option (plus: *not altering the pitch* when playing
> Man-pages say:
> -af <filter1[=parameter1:parameter2:...],filter2,...>
> Setup a chain of audio filters.
> Seems that´s what I´m looking for.
Notice the comma in the above, before 'filter2'.
> This command however doesn´t work:
> mplayer -af scaletempo=scale=1.2:speed=pitch -srate 44100 -af
> lavcresample=44100 -af equalizer=0:0:0:0:0:0:0:0:7:7 test.wav
> I.e.: the equalizer option does work (audio is much crisper) but it´s
> all played back at normal speed (not with the factor of "1.2").
> Could anybody help me with the correct syntax?
I haven't tried this myself, and don't have much experience with using
filters, but I'd suggest you see what you get from:
-srate 44100 test.wav
My guess is that each time you specified the '-af' option, it was
overriding the value you set with the previous time, so that in the end
only the equalizer filter was being applied.
The reasonable man adapts himself to the world; the unreasonable one
persists in trying to adapt the world to himself. Therefore all
progress depends on the unreasonable man. -- George Bernard Shaw
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