Am 03.10.2018 um 10:43 schrieb Paul B Mahol:
On 10/2/18, Michael Koch <astroelectro...@t-online.de> wrote:
I'm still experimenting with the ultrasonic converter. Converting from
one file to another file works without problems:
C:\Users\mkoch\Desktop\Ultrasonic Live>c://ffmpeg/ffmpeg -i
test_15kHz.mp3 -f la
vfi -i aevalsrc="sin(12000*2*PI*t):c=stereo:s=44100" -filter_complex
"[0]volume=
1,highpass=f=12000,highpass=f=12000,highpass=f=12000,highpass=f=12000[sound];[so
und][1]amultiply,lowpass=f=10000,lowpass=f=10000,lowpass=f=10000,lowpass=f=10000
" -y out.mp3
(no console output, because this is working fine)
As the next step, I want to hear the output live on the speakers. I did
use exactly the same command line as above, but I replaced ffmpeg by
ffplay and I omitted the output file. At the end of the console output
is an error message. Can't ffplay handle two inputs? Why doesn't ffplay
accept the command line that works fine with ffmpeg?
You should really, really use mpv, it supports multiple inputs, and
complex filtergraph (unlike ffplay)
mpv test.mp3 -lavfi-complex
"aevalsrc=sin(5000*2*PI*t):c=stereo:s=44100[sine],[aid1]highpass=f=5000,highpass=f=5000,highpass=f=5000,highpass=f=5000[sound],[sound][sine]amultiply,dynaudnorm=m=100,lowpass=f=1000,lowpass=f=10000,lowpass=f=10000,lowpass=f=10000,asplit[ao],showspectrum=scale=log:size=hd720:color=channel[vo]"
oh no, I don't want to learn a new command line syntax only to solve
this simple problem.
I have a long ffmpeg command line that's working fine when writing the
output to a file. Is there really no easy way to send the output to the
speakers instead?
Michael
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