Gain adjustment in odr-audioenc?

[Peter Whisker]

Hi

When encoding from a stream using -v, the input is processed through libvlc. I have tried unsuccessfully to alter the gain of the imput using the -L --norm-max-level, -L --compressor-rms-peak and -L --gain cvlc settings but none of them seem to have any effect on the level of audio passed through the encoder. Perhaps this is because these controls work on the output side in VLC and the part of libvlc used is only the input?

Is there any way to adjust the gain? I have one icecast feed I use which is at 0db and I would like to take adjust it down to -6dB.

Thanks
Peter

[Matthias Brändli]

Hi,

From the ODR-AudioEnc usage screen:

-g, --vlc-gain=db Enable VLC audio compressor,
with given compressor-makeup value.
Use this as a workaround to
correct the gain for streams that are
much too loud.

Does that work?

mpb

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[Peter Whisker]

I've tried with -g=20 and -g=-20 and neither seems to make any difference. I am using your latest odr-audioenc with the samplerate fix.

Peter

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[Matthias Brändli]

and --vlc-gain=20 ?

I'm not sure if

-g=20

is equivalent to

-g 20

mpb

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[Matthias Brändli]

Yeah sorry, the option gets passed directly to VLC, so if you put -g=20,
VLC gets

--compressor-makeup==20

instead of

--compressor-makeup=20

With -g 20 I see an effect, with -g=20 I don't.

mpb

[888...@gmail.com]

Option -g is compressor? how to change gain without use compression?

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[Peter Whisker]

Hi, thanks. -g -6 does what I need :-)

Peter

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