odr-audioenc vlc transcoding and gain change

[Markus B.]

Hello,
possible there is another topic about this, but gain change with vlc transcoding in odr-audioenc wasn't work in my environment after 3 days testing.

odr-audioenc --vlc-uri=http://xyz.cast.addradio.de/xyz/simulcast/high/stream.mp3 --bitrate=72 --sbr -V -L --audio-resampler=samplerate -L --src-converter-type=1 -L --gain=4 --edi=tcp://localhost:7005

With -L --gain=4 nothing changes. Also nothing changes with
-L --audio-filter=gain -L --gain=4
-L --audio-replay-gain-default=-20
-L --audio-replay-gain-preamp=-20
-L --volume-step=20

The verbose option lists the parameter, but you can't hear any difference:

Initialising VLC...
You are using VLC with size_t size callbacks
Initialising VLC with options:
  --verbose=1
  --audio-resampler=samplerate
  --src-converter-type=1
  --gain=4
Setting VLC media option: :sout=#transcode{acodec=fl32,samplerate=48000}:smem{audio-postrender-callback=140168,audio-prerender-callback=137408,audio-data=13095756}

Has anybody any idea? Many thanks,
Markus

[Nick Piggott]

Hi Markus

Have you tried the native --vlc-gain switch?

odr-audioenc --vlc-uri=http://xyz.cast.addradio.de/xyz/simulcast/high/stream.mp3 --vlc-gain=4 --bitrate=72 --sbr -V -L --audio-resampler=samplerate -L --src-converter-type=1 --edi=tcp://localhost:7005  

That's working for me on my production versions (2.6.1)

Nick

[Markus B.]

Hello Nick,

with the native --vlc-gain switch you only can increase the volume, but I want to decrease the volume. The switch will not work with volumes like 0.1 or -4 or something else.

Markus

[Matthias Brändli]

Hi Markus,

negative values for --vlc-gain should work fine, they are forwarded to
VLC using its --compressor-makeup setting.

mpb

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[Nick Piggott]

Hello,

I can confirm that negative values of --vlc-gain= do work on odr-audioenc v 2.6.1

Nick

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Nick

[Markus B.]

Hello Matthias, hello Nick,

it is not working for me. Please see the output:

   Bandwidth is 10125
   DAB+ Encoding: framelen=1920 (7680B)

   Initialising VLC...
   You are using VLC with size_t size callbacks
   Initialising VLC with options:
     --verbose=1

     --compressor-makeup=-4
     --audio-resampler=samplerate
     --src-converter-type=1
I'm using ODR-AudioEnc 2.6.0 and VLC media player 3.0.8 Vetinari.

With cvlc -H you can see the vlc option has changed to --compressor-makup-gain= . But is isn't working, too.

Many thanks

Markus

[Markus B.]

Hello,

I have testet the gain change on 2 other systems. But it is the same problem. The gain only can changed to more - not to less.

Markus