From kde-multimedia  Sun May 01 23:14:38 2022
From: David Jarvie <djarvie () kde ! org>
Date: Sun, 01 May 2022 23:14:38 +0000
To: kde-multimedia
Subject: Re: Phonon VolumeFaderEffect not working with VLC backend
Message-Id: <2247222.7m4b2nqHh7 () stewjar>
X-MARC-Message: https://marc.info/?l=kde-multimedia&m=165144684825190

On Sunday, 1 May 2022 19:59:46 BST David Jarvie wrote:
> On Sunday, 1 May 2022 00:23:30 BST Harald Sitter wrote:
> > Unfortunately VolumeFaderEffect is presently not supported by VLC
> 
> Is it possible to determine programmatically whether the current backend
> supports VolumeFaderEffect? I looked at the output from
> BackendCapabilities::availableAudioEffects(), and for GStreamer it returns
> names and descriptions:
> 
> "equalizer-10bands",  desc: "Direct Form 10 band IIR equalizer"
> "KEqualizer",  desc: "Compatibility effect. Do not use in new software!"
> "audiopanorama",  desc: "Positions audio streams in the stereo panorama"
> "audioamplify",  desc: "Amplifies an audio stream by a given factor"
> "audiodynamic",  desc: "Compressor and Expander"
> 
> None of these is (to me) obviously related to VolumeFaderEffect. For VLC,
> only the first one is returned, "equalizer-10bands".

I just discovered that VolumeFaderEffect::isValid() tells whether the backend 
supports VolumeFaderEffect. So please ignore my last message.

Thanks,
-- 
David Jarvie.
KDE developer, KAlarm author.