[Bug 242139] oss long sound delays

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=242139

--- Comment #13 from Artem Kim <prjanica at yandex.ru> ---

Mixer vol      is currently set to 100:100
Mixer pcm      is currently set to  75:75
Mixer speaker  is currently set to  75:75
Mixer mic      is currently set to   0:0
Mixer line2    is currently set to   100:100
Recording source: line2

microphone included in line2 input

I didn't say it right. the sound is there, but the frequency is very low-it's
more wheezing and clicks.

I record regularly record screencasts. a similar script only for video I use
for a long time.

$ cat grab_audio.sh
#!/bin/sh

sr=48000
name=au_grab
path=/tmp/scrCst

flnm=${path}/${name}

mixer vol 0
mixer line2 100

mkdir -p ${path}

ffmpeg -f oss -i /dev/dsp -ar ${sr}  "${flnm}.wav"

mixer line2 0
mixer vol 100

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