LibVLC: add APIs for audio-filter

Original title: "How do we use the Audio Filter, such like: pitch-shift?"

I'm using the v4.0 beta version of LibVLCSharp in Windows 10, I ask this question in here because this is more like a core issue.(VLC lib version is same: v4.0)

I want the audio using the pitch-shift effect. So I tried use:

string[] options = { "--audio-filter=scaletempo_pitch", "--pitch-shift=5", "--scaletempo-search=100", "--scaletempo-overlap=0.5", "--scaletempo-stride=1000" };
_mediaPlayer = new MediaPlayer(_libVLC);

But nothings change, then I tried other way like:

_mediaPlayer.Play(new Media(new Uri(@"Y:\video.mp4"), options));

Or :

videoView.MediaPlayer.Media.AddOption("--audio-filter=scaletempo_pitch");
videoView.MediaPlayer.Media.AddOption("--pitch-shift=5");

But all not working, what's happening? what is the correct way? My second question is : Is it possible to access some custom audio filter file like : *.ax file?

changed the description

marked this issue as related to #27252 (closed)

marked this issue as related to #24640 (closed)

added Component::Bindings: LibVLC (native API) label

changed title from How do we use the Audio Filter, such like: pitch-shift? to LibVLC: add APIs for audio-folter

changed the description

changed title from LibVLC: add APIs for audio-folter to LibVLC: add APIs for audio-filter

marked this issue as related to #5603

Hello @huangjinshe, thanks for the report, we are aware of this issue, it is currently not possible (but we will work on it).

changed milestone to %5.0.0