Libvlc : audio-filter as argument

[bounty]

Hi
when I use
C:\Program Files (x86)\VideoLAN\VLC\vlc.exe mymusic.mp3 –audio-filter=mono
It works well .

When I use libvlc in C or C++

char const *vlc_argv[] = {
"--audio-filter=mono"
};
int vlc_argc = sizeof(vlc_argv) / sizeof(*vlc_argv);
libvlc = libvlc_new(vlc_argc, vlc_argv);

It seems that VLC does not use the filter.
What's wrong?

[grindstone]

It seems to me that "--audio-filter=mono" doesn't work at all. As a workaround you can use the "transcode" - option instead:

Code: Select all

char smem_options[256]; sprintf(smem_options, "#transcode{acodec=s16l,channels=1}:duplicate{dst=display,dst=dummy}"; const char * const vlc_argv[] = { "--sout", smem_options }; int vlc_argc = sizeof(vlc_argv) / sizeof(*vlc_argv); libvlc = libvlc_new(vlc_argc, vlc_argv);

[Rémi Denis-Courmont]

audio-filter is not meant to be used with LibVLC.

[bounty]

Thanks for the tip grindstone.

My aim was to be able to use an audio -filter custom , but
I understand that this is only possible through libvlccore

https://forum.videolan.org/viewtopic.php?f=32&t=121953

[grindstone]

@bounty:
That's a very interesting thread! Maybe it's valuable to create libvlccore bindings for freeBasic (or maybe it's easier to use the command line args). I'll have a look at it.

[ppcat]

Hi.

...through libvlccore
https://forum.videolan.org/viewtopic.php?f=32&t=121953

It works great.
Can I to chain 2 audio filters this way?
If not, maybe is there other way?